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Journal articles on the topic 'Left parietal cortex'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Moustafa EM Radwan. "Cortical Laminar necrosis in a patient with chronic cerebral infarction; Case report." World Journal of Advanced Research and Reviews 8, no. 2 (2020): 095–98. http://dx.doi.org/10.30574/wjarr.2020.8.2.0407.

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Cortical laminar necrosis (CLN) is a persistent ischemic injury attributed to a particular pan necrosis of the cerebral cortex (comprising neurons, glia, and blood vessels although underline white matter is totally or partially spared). CLN is represented radiologically by the typical curvilinear gyriform distribution high signal intensity cortical lesions on T1 weighted MRI images in the affected cerebral convolutions. This is a case of cortical laminar necrosis following old left temporo-parietal ischemic infarction. A 67-year male patient with a prior history of old left temporo-parietal is

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Moustafa, EM Radwan. "Cortical Laminar necrosis in a patient with chronic cerebral infarction; Case report." World Journal of Advanced Research and Reviews 8, no. 2 (2020): 095–98. https://doi.org/10.5281/zenodo.4318494.

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Cortical laminar necrosis (CLN) is a persistent ischemic injury attributed to a particular pan necrosis of the cerebral cortex (comprising neurons, glia, and blood vessels although underline white matter is totally or partially spared). CLN is represented radiologically by the typical curvilinear gyriform distribution high signal intensity cortical lesions on T1 weighted MRI images in the affected cerebral convolutions. This is a case of cortical laminar necrosis following old left temporo-parietal ischemic infarction. A 67-year male patient with a prior history of old left temporo-parietal is

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Ruff, Christian C., Felix Blankenburg, Otto Bjoertomt, Sven Bestmann, Nikolaus Weiskopf, and Jon Driver. "Hemispheric Differences in Frontal and Parietal Influences on Human Occipital Cortex: Direct Confirmation with Concurrent TMS–fMRI." Journal of Cognitive Neuroscience 21, no. 6 (2009): 1146–61. http://dx.doi.org/10.1162/jocn.2009.21097.

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We used concurrent TMS–fMRI to test directly for hemispheric differences in causal influences of the right or left fronto-parietal cortex on activity (BOLD signal) in the human occipital cortex. Clinical data and some behavioral TMS studies have been taken to suggest right-hemisphere specialization for top–down modulation of vision in humans, based on deficits such as spatial neglect or extinction in lesioned patients, or findings that TMS to right (vs. left) fronto-parietal structures can elicit stronger effects on visual performance. But prior to the recent advent of concurrent TMS and neuro

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Rushworth, M. "The left parietal cortex and motor attention." Neuropsychologia 35, no. 9 (1997): 1261–73. http://dx.doi.org/10.1016/s0028-3932(97)00050-x.

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Garcea, Frank E., Jorge Almeida, Maxwell H. Sims, et al. "Domain-Specific Diaschisis: Lesions to Parietal Action Areas Modulate Neural Responses to Tools in the Ventral Stream." Cerebral Cortex 29, no. 7 (2018): 3168–81. http://dx.doi.org/10.1093/cercor/bhy183.

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Abstract Neural responses to small manipulable objects (“tools”) in high-level visual areas in ventral temporal cortex (VTC) provide an opportunity to test how anatomically remote regions modulate ventral stream processing in a domain-specific manner. Prior patient studies indicate that grasp-relevant information can be computed about objects by dorsal stream structures independently of processing in VTC. Prior functional neuroimaging studies indicate privileged functional connectivity between regions of VTC exhibiting tool preferences and regions of parietal cortex supporting object-directed

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Fitzpatrick, Aoife M., Neil M. Dundon, and Kenneth F. Valyear. "Hand choice is unaffected by high frequency continuous theta burst transcranial magnetic stimulation to the posterior parietal cortex." PLOS ONE 17, no. 10 (2022): e0275262. http://dx.doi.org/10.1371/journal.pone.0275262.

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The current study used a high frequency TMS protocol known as continuous theta burst stimulation (cTBS) to test a model of hand choice that relies on competing interactions between the hemispheres of the posterior parietal cortex. Based on the assumption that cTBS reduces cortical excitability, the model predicts a significant decrease in the likelihood of selecting the hand contralateral to stimulation. An established behavioural paradigm was used to estimate hand choice in each individual, and these measures were compared across three stimulation conditions: cTBS to the left posterior pariet

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Wei, Pengxu, and Ruixue Bao. "The Role of Insula-Associated Brain Network in Touch." BioMed Research International 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/734326.

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The insula is believed to be associated with touch-evoked effects. In this work, functional MRI was applied to investigate the network model of insula function when 20 normal subjects received tactile stimulation over segregated areas. Data analysis was performed with SPM8 and Conn toolbox. Activations in the contralateral posterior insula were consistently revealed for all stimulation areas, with the overlap located in area Ig2. The area Ig2 was then used as the seed to estimate the insula-associated network. The right insula, left superior parietal lobule, left superior temporal gyrus, and l

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Assmus, Ann, Carsten Giessing, Peter H. Weiss, and Gereon R. Fink. "Functional Interactions during the Retrieval of Conceptual Action Knowledge: An fMRI Study." Journal of Cognitive Neuroscience 19, no. 6 (2007): 1004–12. http://dx.doi.org/10.1162/jocn.2007.19.6.1004.

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Impaired retrieval of conceptual knowledge for actions has been associated with lesions of left premotor, left parietal, and left middle temporal areas [Tranel, D., Kemmerer, D., Adolphs, R., Damasio, H., & Damasio, A. R. Neural correlates of conceptual knowledge for actions. Cognitive Neuropsychology, 409–432, 2003]. Here we aimed at characterizing the differential contribution of these areas to the retrieval of conceptual knowledge about actions. During functional magnetic resonance imaging (fMRI), different categories of pictograms (whole-body actions, manipulable and nonmanipulable obj

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Davranche, Karen, Bruno Nazarian, Franck Vidal, and Jennifer Coull. "Orienting Attention in Time Activates Left Intraparietal Sulcus for Both Perceptual and Motor Task Goals." Journal of Cognitive Neuroscience 23, no. 11 (2011): 3318–30. http://dx.doi.org/10.1162/jocn_a_00030.

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Attention can be directed not only toward a location in space but also to a moment in time (“temporal orienting”). Temporally informative cues allow subjects to predict when an imminent event will occur, thereby speeding responses to that event. In contrast to spatial orienting, temporal orienting preferentially activates left inferior parietal cortex. Yet, left parietal cortex is also implicated in selective motor attention, suggesting its activation during temporal orienting could merely reflect incidental engagement of preparatory motor processes. Using fMRI, we therefore examined whether t

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Breveglieri, Rossella, Sara Borgomaneri, Matteo Filippini, Marina De Vitis, Alessia Tessari, and Patrizia Fattori. "Functional Connectivity at Rest between the Human Medial Posterior Parietal Cortex and the Primary Motor Cortex Detected by Paired-Pulse Transcranial Magnetic Stimulation." Brain Sciences 11, no. 10 (2021): 1357. http://dx.doi.org/10.3390/brainsci11101357.

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The medial posterior parietal cortex (PPC) is involved in the complex processes of visuomotor integration. Its connections to the dorsal premotor cortex, which in turn is connected to the primary motor cortex (M1), complete the fronto-parietal network that supports important cognitive functions in the planning and execution of goal-oriented movements. In this study, we wanted to investigate the time-course of the functional connectivity at rest between the medial PPC and the M1 using dual-site transcranial magnetic stimulation in healthy humans. We stimulated the left M1 using a suprathreshold

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Bakulin, I. S., A. H. Zabirova, P. N. Kopnin, et al. "Cerebral cortex activation during the Sternberg verbal working memory task." Bulletin of Russian State Medical University, no. (1)2020 (February 29, 2020): 40–48. http://dx.doi.org/10.24075/brsmu.2020.013.

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Despite intensive study, the data regarding functional role of specific brain regions in the working memory processes still remain controversial. The study was aimed to determine the activation of cerebral cortex regions at different stages of the working memory task (information encoding, maintenance and retrieval). Functional magnetic resonance imaging (fMRI) with the modified Sternberg task was applied to 19 healthy volunteers. The objective of the task was to memorize and retain in memory the sequence of 7 letters with the subsequent comparison of one letter with the sequence. Activation w

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Wiener, Martin, Peter E. Turkeltaub, and H. Branch Coslett. "Implicit timing activates the left inferior parietal cortex." Neuropsychologia 48, no. 13 (2010): 3967–71. http://dx.doi.org/10.1016/j.neuropsychologia.2010.09.014.

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Berthoz, Alain. "Parietal and hippocampal contribution to topokinetic and topographic memory." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 352, no. 1360 (1997): 1437–48. http://dx.doi.org/10.1098/rstb.1997.0130.

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This paper reviews the involvement of the parietal cortex and the hippocampus in three kinds of spatial memory tasks which all require a memory of a previously experienced movement in space. The first task compared, by means of positron emission tomography (PET) scan techniques, the production, in darkness, of self–paced saccades (SAC) with the reproduction, in darkness, of a previously learned sequence of saccades to visual targets (SEQ). The results show that a bilateral increase of activity was seen in the depth of the intraparietal sulcus and the medial superior parietal cortex (superior p

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Schroeder, J., M. S. Buchsbaum, B. V. Siegel, et al. "Patterns of cortical activity in schizophrenia." Psychological Medicine 24, no. 4 (1994): 947–55. http://dx.doi.org/10.1017/s0033291700029032.

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SynopsisEighty-three patients with schizophrenia and 47 healthy controls received positron emission tomography (PET) with 18F-2-deoxyglucose uptake while they were executing the Continuous Performance Test (CPT). The entire cortex was divided into 16 regions of interest in each hemisphere, four in each lobe of the brain, and data from corresponding right and left hemispheric regions were averaged. Data from the schizophrenic patients were subjected to a factor analysis, which revealed five factors that explained 80% of the common variance. According to their content, the factors were identifie

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Haaland, Kathleen Y., Catherine L. Elsinger, Andrew R. Mayer, Sally Durgerian, and Stephen M. Rao. "Motor Sequence Complexity and Performing Hand Produce Differential Patterns of Hemispheric Lateralization." Journal of Cognitive Neuroscience 16, no. 4 (2004): 621–36. http://dx.doi.org/10.1162/089892904323057344.

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Studies in brain damaged patients conclude that the left hemisphere is dominant for controlling heterogeneous sequences performed by either hand, presumably due to the cognitive resources involved in planning complex sequential movements. To determine if this lateralized effect is due to asymmetries in primary sensorimotor or association cortex, whole-brain functional magnetic resonance imaging was used to measure differences in volume of activation while healthy right-handed subjects performed repetitive (simple) or heterogeneous (complex) finger sequences using the right or left hand. Advanc

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Notebaert, Karolien, Sabine Nelis, and Bert Reynvoet. "The Magnitude Representation of Small and Large Symbolic Numbers in the Left and Right Hemisphere: An Event-related fMRI Study." Journal of Cognitive Neuroscience 23, no. 3 (2011): 622–30. http://dx.doi.org/10.1162/jocn.2010.21445.

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Numbers are known to be processed along the left and right intraparietal sulcus. The present study investigated hemispheric differences between the magnitude representation of small and large symbolic numbers. To this purpose, an fMRI adaptation paradigm was used, where the continuous presentation of a habituation number was interrupted by an occasional deviant number. The results presented a distance-dependent increase of activation: larger ratios of habituation and deviant number caused a larger recovery of activation. Similar activation patterns were observed for small and large symbolic nu

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Arnold, Stephan, Soheyl Noachtar, Rainer Linke, et al. "Ictal SPECT hyperperfusion reflects the activation of the symptomatogenic cortex in spontaneous and electrically‐induced non‐habitual focal epileptic seizures: correlation with subdural EEG recordings." Epileptic Disorders 2, no. 1 (2000): 41–44. http://dx.doi.org/10.1684/j.1950-6945.2000.tb00349.x.

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ABSTRACT We report a patient with left temporal lobe epilepsy and a left parietal angioma, in whom ictal SPECT showed hyperperfusion in a spontaneous and an electrically‐induced, non‐habitual focal seizure. A SPECT investigation during an habitual seizure originating in the left temporal lobe showed a left temporal hyperperfusion. Electrical stimulation of the parietal cortex adjacent to the location of a previously resected angioma using subdural electrodes resulted in a non‐habitual seizure beginning with a unilateral somatosensory aura. Ictal SPECT of this seizure demonstrated contralateral

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Sui, Shuang Ge, Ming Xiang Wu, Mark E. King, et al. "Abnormal grey matter in victims of rape with PTSD in Mainland China: a voxel-based morphometry study." Acta Neuropsychiatrica 22, no. 3 (2010): 118–26. http://dx.doi.org/10.1111/j.1601-5215.2010.00459.x.

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Sui SG, Wu MX, King ME, Zhang Y, Ling L, Xu JM, Weng XC, Duan L, Shan BC, Li LJ. Abnormal grey matter in victims of rape with PTSD in Mainland China: a voxel-based morphometry study.Objective:This study examined changes in brain grey matter in victims of rape (VoR) with and without post-traumatic stress disorder (PTSD). Previous research has focused on PTSD caused by various traumatic events, such as war and disaster, among others. Although considerable research has focused on rape-related PTSD, limited studies have been carried out in the context of Mainland China.Methods:The study included 1

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Vallar, Giuseppe. "Spatial Neglect, Balint-Homes' and Gerstmann's Syndrome, and Other Spatial Disorders." CNS Spectrums 12, no. 7 (2007): 527–36. http://dx.doi.org/10.1017/s1092852900021271.

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ABSTRACTBrain-damaged patients with lesion or dysfunction involving the parietal cortex may show a variety of neuropsychological impairments involving spatial cognition. The more frequent and disabling deficit is the syndrome of unilateral spatial neglect that, in a nutshell, consists in a bias of spatial representation and attention ipsilateral to of extrapersonal, personal (ie, the body) space, or both, toward the side of the hemispheric lesion. The deficit is more frequent and severe after damage to the right hemisphere, involving particularly the posterior-inferior parietal cortex at the t

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Wada, Makoto, Kouji Takano, Shiro Ikegami, Hiroki Ora, Charles Spence, and Kenji Kansaku. "Spatio-Temporal Updating in the Left Posterior Parietal Cortex." PLoS ONE 7, no. 6 (2012): e39800. http://dx.doi.org/10.1371/journal.pone.0039800.

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Nelson, Steven M., Alexander L. Cohen, Jonathan D. Power, et al. "A Parcellation Scheme for Human Left Lateral Parietal Cortex." Neuron 67, no. 1 (2010): 156–70. http://dx.doi.org/10.1016/j.neuron.2010.05.025.

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Bracci, Stefania, Cristiana Cavina-Pratesi, Magdalena Ietswaart, Alfonso Caramazza, and Marius V. Peelen. "Closely overlapping responses to tools and hands in left lateral occipitotemporal cortex." Journal of Neurophysiology 107, no. 5 (2012): 1443–56. http://dx.doi.org/10.1152/jn.00619.2011.

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The perception of object-directed actions performed by either hands or tools recruits regions in left fronto-parietal cortex. Here, using functional MRI (fMRI), we tested whether the common role of hands and tools in object manipulation is also reflected in the distribution of response patterns to these categories in visual cortex. In two experiments we found that static pictures of hands and tools activated closely overlapping regions in left lateral occipitotemporal cortex (LOTC). Left LOTC responses to tools selectively overlapped with responses to hands but not with responses to whole bodi

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Martin, Ruth E., Bradley J. MacIntosh, Rebecca C. Smith, et al. "Cerebral Areas Processing Swallowing and Tongue Movement Are Overlapping but Distinct: A Functional Magnetic Resonance Imaging Study." Journal of Neurophysiology 92, no. 4 (2004): 2428–43. http://dx.doi.org/10.1152/jn.01144.2003.

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Although multiple regions of the cerebral cortex have been implicated in swallowing, the functional contributions of each brain area remain unclear. The present study sought to clarify the roles of these cortical foci in swallowing by comparing brain activation associated with voluntary saliva swallowing and voluntary tongue elevation. Fourteen healthy right-handed subjects were examined with single-event–related functional magnetic resonance imaging (fMRI) while laryngeal movements associated with swallowing and tongue movement were simultaneously recorded. Both swallowing and tongue elevatio

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Leo, Andrea, Giulio Bernardi, Giacomo Handjaras, Daniela Bonino, Emiliano Ricciardi, and Pietro Pietrini. "Increased BOLD Variability in the Parietal Cortex and Enhanced Parieto-Occipital Connectivity during Tactile Perception in Congenitally Blind Individuals." Neural Plasticity 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/720278.

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Previous studies in early blind individuals posited a possible role of parieto-occipital connections in conveying nonvisual information to the visual occipital cortex. As a consequence of blindness, parietal areas would thus become able to integrate a greater amount of multimodal information than in sighted individuals. To verify this hypothesis, we compared fMRI-measured BOLD signal temporal variability, an index of efficiency in functional information integration, in congenitally blind and sighted individuals during tactile spatial discrimination and motion perception tasks. In both tasks, t

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Schumacher, Eric H., Puni A. Elston, and Mark D'Esposito. "Neural Evidence for Representation-Specific Response Selection." Journal of Cognitive Neuroscience 15, no. 8 (2003): 1111–21. http://dx.doi.org/10.1162/089892903322598085.

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Response selection is the mental process of choosing representations for appropriate motor behaviors given particular environmental stimuli and one's current task situation and goals. Many cognitive theories of response selection postulate a unitary process. That is, one central response-selection mechanism chooses appropriate responses in most, if not all, task situations. However, neuroscience research shows that neural processing is often localized based on the type of information processed. Our current experiments investigate whether response selection is unitary or stimulus specific by ma

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Skagerlund, Kenny, Taylor Bolt, Jason S. Nomi, et al. "Disentangling Mathematics from Executive Functions by Investigating Unique Functional Connectivity Patterns Predictive of Mathematics Ability." Journal of Cognitive Neuroscience 31, no. 4 (2019): 560–73. http://dx.doi.org/10.1162/jocn_a_01367.

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What are the underlying neurocognitive mechanisms that give rise to mathematical competence? This study investigated the relationship between tests of mathematical ability completed outside the scanner and resting-state functional connectivity (FC) of cytoarchitectonically defined subdivisions of the parietal cortex in adults. These parietal areas are also involved in executive functions (EFs). Therefore, it remains unclear whether there are unique networks for mathematical processing. We investigate the neural networks for mathematical cognition and three measures of EF using resting-state fM

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Gerschlager, Willibald, Hartwig R. Siebner, and John C. Rothwell. "Decreased corticospinal excitability after subthreshold 1 Hz rTMS over lateral premotor cortex." Neurology 57, no. 3 (2001): 449–55. http://dx.doi.org/10.1212/wnl.57.3.449.

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Objective: To study whether trains of subthreshold 1 Hz repetitive transcranial magnetic stimulation (rTMS) over premotor, prefrontal, or parietal cortex can produce changes in excitability of motor cortex that outlast the application of the train.Background: Prolonged 1 Hz rTMS over the motor cortex can suppress the amplitude of motor-evoked potentials (MEP) for several minutes after the end of the train. Because TMS can produce effects not only at the site of stimulation but also at distant sites to which it projects, the authors asked whether prolonged stimulation of sites distant but conne

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Beeram, Vamseemohan, Sundaram Challa, and Prasad Vannemreddy. "Cerebral mycetoma with cranial osteomyelitis." Journal of Neurosurgery: Pediatrics 1, no. 6 (2008): 493–95. http://dx.doi.org/10.3171/ped/2008/1/6/493.

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✓ Craniocerebral maduromycetoma is extremely rare. The authors describe a case of maduromycetoma involving the left parietal cortex, bone, and subcutaneous tissue in a young male farm laborer who presented with left parietal scalp swelling that had progressed into a relentlessly discharging sinus. Computed tomography (CT) scanning of his brain revealed osteomyelitis of the parietal bone with an underlying homogeneously enhancing tumor. Intraoperatively, the mass was revealed to be a black lesion involving the bone, dura mater, and underlying cerebral cortex. It was friable and separated from t

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Vesia, Michael, Jachin A. Monteon, Lauren E. Sergio, and J. D. Crawford. "Hemispheric Asymmetry in Memory-Guided Pointing During Single-Pulse Transcranial Magnetic Stimulation of Human Parietal Cortex." Journal of Neurophysiology 96, no. 6 (2006): 3016–27. http://dx.doi.org/10.1152/jn.00411.2006.

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Dorsal posterior parietal cortex (PPC) has been implicated through single-unit recordings, neuroimaging data, and studies of brain-damaged humans in the spatial guidance of reaching and pointing movements. The present study examines the causal effect of single-pulse transcranial magnetic stimulation (TMS) over the left and right dorsal posterior parietal cortex during a memory-guided “reach-to-touch” movement task in six human subjects. Stimulation of the left parietal hemisphere significantly increased endpoint variability, independent of visual field, with no horizontal bias. In contrast, ri

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Price, C. J., C. J. Mummery, C. J. Moore, R. S. J. Frackowiak, and K. J. Friston. "Delineating Necessary and Sufficient Neural Systems with Functional Imaging Studies of Neuropsychological Patients." Journal of Cognitive Neuroscience 11, no. 4 (1999): 371–82. http://dx.doi.org/10.1162/089892999563481.

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This paper demonstrates how functional imaging studies of neuropsychological patients can provide a way of determining which areas in a cognitive network are jointly necessary and sufficient. The approach is illustrated with an investigation of the neural system underlying semantic similarity judgments. Functional neuroimaging demonstrates that normal subjects activate left temporal, parietal, and inferior frontal cortices during this task relative to physical size judgments. Neuropsychology demonstrates that damage to the temporal and parietal regions results in semantic deficits, indicating

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Lyons, Ian M., and Daniel Ansari. "The Cerebral Basis of Mapping Nonsymbolic Numerical Quantities onto Abstract Symbols: An fMRI Training Study." Journal of Cognitive Neuroscience 21, no. 9 (2009): 1720–35. http://dx.doi.org/10.1162/jocn.2009.21124.

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Although significant insights into the neural basis of numerical and mathematical processing have been made, the neural processes that enable abstract symbols to become numerical remain largely unexplored in humans. In the present study, adult participants were trained to associate novel symbols with nonsymbolic numerical magnitudes (arrays of dots). Functional magnetic resonance imaging was used to examine the neural correlates of numerical comparison versus recognition of the novel symbols after each of two training stages. A left-lateralized fronto-parietal network, including the intraparie

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Malfait, Nicole, Kenneth F. Valyear, Jody C. Culham, Jean-Luc Anton, Liana E. Brown, and Paul L. Gribble. "fMRI Activation during Observation of Others' Reach Errors." Journal of Cognitive Neuroscience 22, no. 7 (2010): 1493–503. http://dx.doi.org/10.1162/jocn.2009.21281.

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When exposed to novel dynamical conditions (e.g., externally imposed forces), neurologically intact subjects easily adjust motor commands on the basis of their own reaching errors. Subjects can also benefit from visual observation of others' kinematic errors. Here, using fMRI, we scanned subjects watching movies depicting another person learning to reach in a novel dynamic environment created by a robotic device. Passive observation of reaching movements (whether or not they were perturbed by the robot) was associated with increased activation in fronto-parietal regions that are normally recru

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Schiff, Sami, Lara Bardi, Demis Basso, and Daniela Mapelli. "Timing Spatial Conflict within the Parietal Cortex: A TMS Study." Journal of Cognitive Neuroscience 23, no. 12 (2011): 3998–4007. http://dx.doi.org/10.1162/jocn_a_00080.

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Orienting and motor attention are known to recruit different regions within right and left parietal lobes. However, the time course and the role played by these modules when visual information competes for different motor response are still unknown. To deal with this issue, single-pulse TMS was applied over the angular (AG) and the supramarginal (SMG) gyri of both hemispheres at several time intervals during the execution of a Simon task. Suppression of the conflict between stimulus and response positions (i.e., the Simon effect) was found when TMS pulse was applied 130 msec after stimulus ons

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Rounis, Elisabeth, Kielan Yarrow, and John C. Rothwell. "Effects of rTMS Conditioning over the Fronto-parietal Network on Motor versus Visual Attention." Journal of Cognitive Neuroscience 19, no. 3 (2007): 513–24. http://dx.doi.org/10.1162/jocn.2007.19.3.513.

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Many studies have shown that visuospatial orienting attention depends on a network of frontal and parietal areas in the right hemisphere. Rushworth et al. [Rushworth, M. F., Krams, M., & Passingham, R. E. The attentional role of the left parietal cortex: The distinct lateralization and localization of motor attention in the human brain. Journal of Cognitive Neuroscience, 13, 698–710, 2001] have recently provided evidence for a left-lateralized network of parietal areas involved in motor attention. Using two variants of a cued reaction time (RT) task, we set out to investigate whether high-

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Öztekin, Ilke, Brian McElree, Bernhard P. Staresina, and Lila Davachi. "Working Memory Retrieval: Contributions of the Left Prefrontal Cortex, the Left Posterior Parietal Cortex, and the Hippocampus." Journal of Cognitive Neuroscience 21, no. 3 (2009): 581–93. http://dx.doi.org/10.1162/jocn.2008.21016.

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Functional magnetic resonance imaging was used to identify regions involved in working memory (WM) retrieval. Neural activation was examined in two WM tasks: an item recognition task, which can be mediated by a direct-access retrieval process, and a judgment of recency task that requires a serial search. Dissociations were found in the activation patterns in the hippocampus and in the left inferior frontal gyrus (LIFG) when the probe contained the most recently studied serial position (where a test probe can be matched to the contents of focal attention) compared to when it contained all other

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Mevorach, Carmel, Glyn W. Humphreys, and Lilach Shalev. "Reflexive and Preparatory Selection and Suppression of Salient Information in the Right and Left Posterior Parietal Cortex." Journal of Cognitive Neuroscience 21, no. 6 (2009): 1204–14. http://dx.doi.org/10.1162/jocn.2009.21088.

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Attentional cues can trigger activity in the parietal cortex in anticipation of visual displays, and this activity may, in turn, induce changes in other areas of the visual cortex, hence, implementing attentional selection. In a recent TMS study [Mevorach, C., Humphreys, G. W., & Shalev, L. Opposite biases in salience-based selection for the left and right posterior parietal cortex. Nature Neuroscience, 9, 740–742, 2006b], it was shown that the posterior parietal cortex (PPC) can utilize the relative saliency (a nonspatial property) of a target and a distractor to bias visual selection. Fu

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Lucerna, Alan, James Espinosa, Taimur Zaman, Risha Hertz, and Douglas Stranges. "Limb Pain as Unusual Presentation of a Parietal Intraparenchymal Bleeding Associated with Crack Cocaine Use: A Case Report." Case Reports in Neurological Medicine 2018 (May 31, 2018): 1–4. http://dx.doi.org/10.1155/2018/9598675.

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Limb pain as a presenting feature of an ischemic or hemorrhagic stroke is extremely rare. Here we present a case of a 65-year-old male with complaints of left arm pain and allodynia (specifically light touch to any part of the left arm produced significant discomfort) who was found to have a right parietal lobe intraparenchymal bleed after smoking crack cocaine. Acute central pain is mainly associated with parietal, thalamic, and brainstem lesions. It has been proposed that acute limb pain from a parietal lobe stroke is due to the disconnection of the parietal cortex from the thalamus secondar

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Brass, Marcel, Markus Ullsperger, Thomas R. Knoesche, D. Yves von Cramon, and Natalie A. Phillips. "Who Comes First? The Role of the Prefrontal and Parietal Cortex in Cognitive Control." Journal of Cognitive Neuroscience 17, no. 9 (2005): 1367–75. http://dx.doi.org/10.1162/0898929054985400.

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Cognitive control processes enable us to adjust our behavior to changing environmental demands. Although neuropsychological studies suggest that the critical cortical region for cognitive control is the prefrontal cortex, neuro-imaging studies have emphasized the interplay of prefrontal and parietal cortices. This raises the fundamental question about the different contributions of prefrontal and parietal areas in cognitive control. It was assumed that the prefrontal cortex biases processing in posterior brain regions. This assumption leads to the hypothesis that neural activity in the prefron

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Bueti, Domenica, Bahador Bahrami, and Vincent Walsh. "Sensory and Association Cortex in Time Perception." Journal of Cognitive Neuroscience 20, no. 6 (2008): 1054–62. http://dx.doi.org/10.1162/jocn.2008.20060.

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The recent upsurge of interest in brain mechanisms of time perception is beginning to converge on some new starting points for investigating this long under studied aspect of our experience. In four experiments, we asked whether disruption of normal activity in human MT/V5 would interfere with temporal discrimination. Although clearly associated with both spatial and motion processing, MT/V5 has not yet been implicated in temporal processes. Following predictions from brain imaging studies that have shown the parietal cortex to be important in human time perception, we also asked whether disru

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Stockert, Anika, Max Wawrzyniak, Julian Klingbeil, et al. "Dynamics of language reorganization after left temporo-parietal and frontal stroke." Brain 143, no. 3 (2020): 844–61. http://dx.doi.org/10.1093/brain/awaa023.

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Abstract The loss and recovery of language functions are still incompletely understood. This longitudinal functional MRI study investigated the neural mechanisms underlying language recovery in patients with post-stroke aphasia putting particular emphasis on the impact of lesion site. To identify patterns of language-related activation, an auditory functional MRI sentence comprehension paradigm was administered to patients with circumscribed lesions of either left frontal (n = 17) or temporo-parietal (n = 17) cortex. Patients were examined repeatedly during the acute (≤1 week, t1), subacute (1

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Shulman, Gordon L., Julie A. Fiez, Maurizio Corbetta, et al. "Common Blood Flow Changes across Visual Tasks: II. Decreases in Cerebral Cortex." Journal of Cognitive Neuroscience 9, no. 5 (1997): 648–63. http://dx.doi.org/10.1162/jocn.1997.9.5.648.

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Nine previous positron emission tomography (PET) studies of human visual information processing were reanalyzed to determine the consistency across experiments of blood flow decreases during active tasks relative to passive viewing of the same stimulus array. Areas showing consistent decreases during active tasks included posterior cingulate/precuneous (Brodmann area, BA 31/7), left (BAS 40 and 39/19) and right (BA 40) inferior parietal cortex, left dorsolateral frontal cortex (BA S), left lateral inferior frontal cortex (BA 10/47), left inferior temporal gyrus @A 20), a strip of medial fronta

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Thimm, M., G. R. Fink, and W. Sturm. "Neural correlates of recovery from acute hemispatial neglect." Restorative Neurology and Neuroscience 26, no. 6 (2008): 481–92. https://doi.org/10.3233/rnn-2008-00434.

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Purpose: To investigate the neural correlates associated with recovery from acute spatial neglect resulting from right hemispheric stroke. Methods: Four neglect patients were investigated both behaviourally and by fMRI at an acute (18 ± 5 days) and at a chronic stage (123 ± 18 days) post stroke. Results: At the second assessment all patients showed substantial behavioural improvements. These were associated with an increase of neural activity in the right middle frontal gyrus, right inferior parietal cortex, right inferior temporal gyrus/fusiform gyrus, left superior temporal gyrus/angular gyr

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PERES, JULIO F. P., ANDREW B. NEWBERG, JULIANE P. MERCANTE, et al. "Cerebral blood flow changes during retrieval of traumatic memories before and after psychotherapy: a SPECT study." Psychological Medicine 37, no. 10 (2007): 1481–91. http://dx.doi.org/10.1017/s003329170700997x.

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ABSTRACTBackgroundTraumatic memory is a key symptom in psychological trauma victims and may remain vivid for several years. Psychotherapy has shown that neither the psychopathological signs of trauma nor the expression of traumatic memories are static over time. However, few studies have investigated the neural substrates of psychotherapy-related symptom changes.MethodWe studied 16 subthreshold post-traumatic stress disorder (PTSD) subjects by using a script-driven symptom provocation paradigm adapted for single photon emission computed tomography (SPECT) that was read aloud during traumatic m

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Zacks, Jeffrey M., Jean M. Vettel, and Pascale Michelon. "Imagined Viewer and Object Rotations Dissociated with Event-Related fMRI." Journal of Cognitive Neuroscience 15, no. 7 (2003): 1002–18. http://dx.doi.org/10.1162/089892903770007399.

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Human spatial reasoning may depend in part on two dissociable types of mental image transformations: objectbased transformations, in which an object is imagined to move in space relative to the viewer and the environment, and perspective transformations, in which the viewer imagines the scene from a different vantage point. This study measured local brain activity with event-related fMRI while participants were instructed to either imagine an array of objects rotating (an object-based transformation) or imagine themselves rotating around the array (a perspective transformation). Object-based t

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Lange, Floris P. de, Peter Hagoort, and Ivan Toni. "Neural Topography and Content of Movement Representations." Journal of Cognitive Neuroscience 17, no. 1 (2005): 97–112. http://dx.doi.org/10.1162/0898929052880039.

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We have used implicit motor imagery to investigate the neural correlates of motor planning independently from actual movements. Subjects were presented with drawings of left or right hands and asked to judge the hand laterality, regardless of the stimulus rotation from its upright orientation. We paired this task with a visual imagery control task, in which subjects were presented with typographical characters and asked to report whether they saw a canonical letter or its mirror image, regardless of its rotation. We measured neurovascular activity with fast event-related fMRI, distinguishing r

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Kansaku, Kenji. "Spatio-temporal updating in the posterior parietal cortex." Seeing and Perceiving 25 (2012): 12. http://dx.doi.org/10.1163/187847612x646352.

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Adopting an unusual posture can sometimes give rise to paradoxical experiences. For example, the subjective ordering of successive unseen tactile stimuli delivered to the two arms can be affected when people cross them. A growing body of evidence highlights the role played by the parietal cortex in spatio-temporal information processing when sensory stimuli are delivered to the body or when actions are executed; however, little is known about the neural basis of such paradoxical feelings. We demonstrate increased fMRI activation in the left posterior parietal cortex when human participants ado

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Cappelletti, Marinella, Hwee Ling Lee, Elliot D. Freeman, and Cathy J. Price. "The Role of Right and Left Parietal Lobes in the Conceptual Processing of Numbers." Journal of Cognitive Neuroscience 22, no. 2 (2010): 331–46. http://dx.doi.org/10.1162/jocn.2009.21246.

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Neuropsychological and functional imaging studies have associated the conceptual processing of numbers with bilateral parietal regions (including intraparietal sulcus). However, the processes driving these effects remain unclear because both left and right posterior parietal regions are activated by many other conceptual, perceptual, attention, and response-selection processes. To dissociate parietal activation that is number-selective from parietal activation related to other stimulus or response-selection processes, we used fMRI to compare numbers and object names during exactly the same con

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Hu, Haimeng, Yining Lyu, Shihong Li, et al. "Aberrant Resting-State Functional Connectivity of the Dorsal Attention Network in Tinnitus." Neural Plasticity 2021 (December 31, 2021): 1–9. http://dx.doi.org/10.1155/2021/2804533.

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Previous functional magnetic resonance imaging (fMRI) analyses have shown that the dorsal attention network (DAN) is involved in the pathophysiological changes of tinnitus, but few relevant studies have been conducted, and the conclusions to date are not uniform. The purpose of this research was to test whether there is a change in intrinsic functional connectivity (FC) patterns between the DAN and other brain regions in tinnitus patients. Thirty-one patients with persistent tinnitus and thirty-three healthy controls were enrolled in this study. A group independent component analysis (ICA), de

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Ro, Tony, Ruth Wallace, Judith Hagedorn, Alessandro Farné, and Elizabeth Pienkos. "Visual Enhancing of Tactile Perception in the Posterior Parietal Cortex." Journal of Cognitive Neuroscience 16, no. 1 (2004): 24–30. http://dx.doi.org/10.1162/089892904322755520.

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Rice University The visual modality typically dominates over our other senses. Here we show that after inducing an extreme conflict in the left hand between vision of touch (present) and the feeling of touch (absent), sensitivity to touch increases for several minutes after the conflict. Transcranial magnetic stimulation of the posterior parietal cortex after this conflict not only eliminated the enduring visual enhancement of touch, but also impaired normal tactile perception. This latter finding demonstrates a direct role of the parietal lobe in modulating tactile perception as a result of t

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LOMBER, STEPHEN G., and BERTRAM R. PAYNE. "Contributions of cat posterior parietal cortex to visuospatial discrimination." Visual Neuroscience 17, no. 5 (2000): 701–9. http://dx.doi.org/10.1017/s0952523800175042.

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The purpose of the present study was to examine the contributions made by cat posterior parietal cortex to the analyses of the relative position of objects in visual space. Two cats were trained on a landmark task in which they learned to report the position of a landmark object relative to a right or left food-reward chamber. Subsequently, three pairs of cooling loops were implanted bilaterally in contact with visuoparietal cortices forming the crown of the middle suprasylvian gyrus (MSg; architectonic area 7) and the banks of the posterior-middle suprasylvian sulcus (pMS sulcal cortex) and i

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