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Journal articles on the topic 'Dorsal and ventral visual path¬ways'

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1

Goodale, Melvyn A., and Jonathan S. Cant. "Coming to grips with vision and touch." Behavioral and Brain Sciences 30, no. 2 (2007): 209–10. http://dx.doi.org/10.1017/s0140525x07001483.

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AbstractDijkerman & de Haan (D&dH) propose a convincing model of somatosensory organization that is inspired by earlier perception-action models of the visual system. In this commentary, we suggest that the dorsal and ventral visual streams both contribute to the control of action, but in different ways. Using the example of grip and load force calibration, we show how the ventral stream can invoke stored information about the material properties of objects originally derived from the somatosensory system.
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2

Zeil, J., and M. Al-Mutairi. "The variation of resolution and of ommatidial dimensions in the compound eyes of the fiddler crab Uca lactea annulipes (Ocypodidae, Brachyura, Decapoda)." Journal of Experimental Biology 199, no. 7 (1996): 1569–77. http://dx.doi.org/10.1242/jeb.199.7.1569.

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We studied variations in the optical properties of the compound eyes of Uca lactea annulipes using in vivo optical and histological techniques. The distribution of resolving power in the eyes of this fiddler crab species is typical for arthropods that inhabit flat environments: the eyes possess a panoramic equatorial acute zone for vertical resolution and a steep decrease of resolution away from the eye equator in the dorsal and ventral visual fields. The dimensions of the cellular components of the ommatidia vary accordingly: in the equatorial part of the eyes, facets are larger, and crystall
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3

Lawton, Teri, John Shelley-Tremblay, Roland R. Lee, and Ming-Xiong Huang. "Retraining Dorsal Visual Pathways Improves Cognitive Skills After a Mild Traumatic Brain Injury." Journal of Clinical Medicine 14, no. 7 (2025): 2273. https://doi.org/10.3390/jcm14072273.

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Background and Objectives: Currently, there are no proven solutions to remediate cognitive deficits in people with a mild traumatic brain injury (mTBI). One common issue is visual timing deficits, which may be due to processing deficits in dorsal visual pathways. Methods: This study investigates whether a new intervention (PATH) aimed at improving these visual timing deficits is more effective than conventional cognitive therapies that either remediate: (1) pattern discrimination deficits (ventral visual pathway): Orientation Discrimination (OD), or (2) working memory deficits using ReCollect
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4

Valyear, Kenneth F., and Jody C. Culham. "Observing Learned Object-specific Functional Grasps Preferentially Activates the Ventral Stream." Journal of Cognitive Neuroscience 22, no. 5 (2010): 970–84. http://dx.doi.org/10.1162/jocn.2009.21256.

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In one popular account of the human visual system, two streams are distinguished, a ventral stream specialized for perception and a dorsal stream specialized for action. The skillful use of familiar tools, however, is likely to involve the cooperation of both streams. Using functional magnetic resonance imaging, we scanned individuals while they viewed short movies of familiar tools being grasped in ways that were either consistent or inconsistent with how tools are typically grasped during use. Typical-for-use actions were predicted to preferentially activate parietal areas important for tool
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5

Landgren, Eva, Kerstin Fritsches, Richard Brill, and Eric Warrant. "The visual ecology of a deep-sea fish, the escolar Lepidocybium flavobrunneum (Smith, 1843)." Philosophical Transactions of the Royal Society B: Biological Sciences 369, no. 1636 (2014): 20130039. http://dx.doi.org/10.1098/rstb.2013.0039.

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Escolar ( Lepidocybium flavobrunneum , family Gempylidae) are large and darkly coloured deep-sea predatory fish found in the cold depths (more than 200 m) during the day and in warm surface waters at night. They have large eyes and an overall low density of retinal ganglion cells that endow them with a very high optical sensitivity. Escolar have banked retinae comprising six to eight layers of rods to increase the optical path length for maximal absorption of the incoming light. Their retinae possess two main areae of higher ganglion cell density, one in the ventral retina viewing the dorsal w
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6

Taylor, Joanne S. H., Matthew H. Davis, and Kathleen Rastle. "Informing methods of reading instruction with cognitive psychology and cognitive neuroscience." Cognitive Psychology Bulletin 1, no. 4 (2019): 11. http://dx.doi.org/10.53841/bpscog.2019.1.4.11.

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Reading acquisition requires learning the associations between visual symbols and the sounds and meanings they represent. In alphabetic languages, the relationship between visual and spoken forms is relatively systematic, whereas the relationship between visual form and meaning is relatively arbitrary. Reading instruction that emphasises the relationship between spelling and sound (phonics) is therefore thought to be most effective, but opponents argue that this method does not improve reading comprehension. We simulated the process of reading acquisition by teaching adults to read artificial
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7

Campbell, Ruth. "The processing of audio-visual speech: empirical and neural bases." Philosophical Transactions of the Royal Society B: Biological Sciences 363, no. 1493 (2007): 1001–10. http://dx.doi.org/10.1098/rstb.2007.2155.

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In this selective review, I outline a number of ways in which seeing the talker affects auditory perception of speech, including, but not confined to, the McGurk effect. To date, studies suggest that all linguistic levels are susceptible to visual influence, and that two main modes of processing can be described: a complementary mode, whereby vision provides information more efficiently than hearing for some under-specified parts of the speech stream, and a correlated mode, whereby vision partially duplicates information about dynamic articulatory patterning. Cortical correlates of seen speech
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8

Mäki-Marttunen, Veronica, Thomas Hagen, Bruno Laeng, and Thomas Espeseth. "Distinct Neural Mechanisms Meet Challenges in Dynamic Visual Attention due to Either Load or Object Spacing." Journal of Cognitive Neuroscience 32, no. 1 (2020): 65–84. http://dx.doi.org/10.1162/jocn_a_01469.

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When engaged in dynamic visuospatial tasks, the brain copes with perceptual and cognitive processing challenges. During multiple-object tracking (MOT), the number of objects to be tracked (i.e., load) imposes attentional demands, but so does spatial interference from irrelevant objects (i.e., close encounters). Presently, it is not clear whether the effect of load on accuracy solely depends on the number of close encounters. If so, the same cognitive and physiological mechanisms deal with increasing load by preparing for and dealing with spatial interference. However, this has never been direc
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9

Li, Xiang, Jinyu Cong, Kunmeng Liu, Pingping Wang, Min Sun, and Benzheng Wei. "Aberrant intrinsic functional brain topology in methamphetamine-dependent individuals after six-months of abstinence." Mathematical Biosciences and Engineering 20, no. 11 (2023): 19565–83. http://dx.doi.org/10.3934/mbe.2023867.

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<abstract> <p>Our aim was to explore the aberrant intrinsic functional topology in methamphetamine-dependent individuals after six months of abstinence using resting-state functional magnetic imaging (rs-fMRI). Eleven methamphetamines (MA) abstainers who have abstained for six months and eleven healthy controls (HC) were recruited for rs-fMRI examination. The graph theory and functional connectivity (FC) analysis were employed to investigate the aberrant intrinsic functional brain topology between the two groups at multiple levels. Compared with the HC group, the characteristic sho
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10

VASILEVA, Neli. "DYNAMICS OF THE COMPELEX FORMS OF VISUAL PERCEPTION IN CHILDREN OF PRE-SCHOOL AGE (A NEUROPSYCHOLOGICAL ANALYSIS)." November 1, 2015. https://doi.org/10.1515/JSER-2015-0011.

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11

Santos, Rommel Andrew, Rodrigo Del Rio, Alexander Delfin Alvarez, Gabriela Romero, Brandon Zarate Vo, and Susana Cohen-Cory. "DSCAM is differentially patterned along the optic axon pathway in the developing Xenopus visual system and guides axon termination at the target." Neural Development 17, no. 1 (2022). http://dx.doi.org/10.1186/s13064-022-00161-9.

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Abstract Background The Xenopus retinotectal circuit is organized topographically, where the dorsal–ventral axis of the retina maps respectively on to the ventral-dorsal axis of the tectum; axons from the nasal-temporal axis of the retina project respectively to the caudal-rostral axis of the tectum. Studies throughout the last two decades have shown that mechanisms involving molecular recognition of proper termination domains are at work guiding topographic organization. Such studies have shown that graded distribution of molecular cues is important for topographic mapping. However, the compl
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12

Teles, Matheus, Jose Omar Maximo, Adrienne Carol Lahti, and Nina Vanessa Kraguljac. "Topological Perturbations in the Functional Connectome Support the Deficit/Non-deficit Distinction in Antipsychotic Medication-Naïve First Episode Psychosis Patients." Schizophrenia Bulletin, April 26, 2024. http://dx.doi.org/10.1093/schbul/sbae054.

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Abstract Background Heterogeneity in the etiology, pathophysiology, and clinical features of schizophrenia challenges clinicians and researchers. A helpful approach could be stratifying patients according to the presence or absence of clinical features of the deficit syndrome (DS). DS is characterized by enduring and primary negative symptoms, a clinically less heterogeneous subtype of the illness, and patients with features of DS are thought to present abnormal brain network characteristics, however, this idea has received limited attention. We investigated functional brain network topology i
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13

Teymornejad, Sadaf, Piotr Majka, Katrina H. Worthy, Nafiseh Atapour, and Marcello G. P. Rosa. "Bilateral connections from the amygdala to extrastriate visual cortex in the marmoset monkey." Cerebral Cortex 34, no. 9 (2024). http://dx.doi.org/10.1093/cercor/bhae348.

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Abstract It is known that the primate amygdala forms projections to many areas of the ipsilateral cortex, but the extent to which it forms connections with the contralateral visual cortex remains less understood. Based on retrograde tracer injections in marmoset monkeys, we report that the amygdala forms widespread projections to the ipsilateral extrastriate cortex, including V1 and areas in both the dorsal (MT, V4T, V3a, 19M, and PG/PFG) and the ventral (VLP and TEO) streams. In addition, contralateral projections were found to target each of the extrastriate areas, but not V1. In both hemisp
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14

Chamanzar, Alireza, Erez Freud, Pulkit Grover, and Marlene Behrmann. "Lesion-network mapping in task-dependent frequencies uncovers remote consequences of focal damage." Imaging Neuroscience, 2025. https://doi.org/10.1162/imag_a_00557.

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Abstract The brain is comprised of a multiplicity of networks with massively interacting nodes. Disruption of a node following brain damage, can result in both short- and long-distance functional abnormalities, affecting even intact brain regions remote from the site of lesion (termed ‘diaschisis’). Diaschisis has been well described previously, and structural and functional connectivity have been been related to clinical findings. However, the mechanistic and neurophysiological properties of this remote loss of function, its temporal and spectral dynamics and its impact on the whole brain rem
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15

Lim, Jaeseob, Sang-Eon Park, Sang-Hun Lee, and Sang Ah Lee. "Canonical cortico-hippocampal dynamics underlie memory of navigational episodes and its early decline in aging." Imaging Neuroscience, 2025. https://doi.org/10.1162/imag.a.101.

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Abstract Successful encoding of a navigational episode entails the dynamic processing of perceptual information, time-locked to the appearance of salient landmarks and turns along the way. We hypothesized that identical navigational experiences will be represented in a similar manner across individuals and that a deviation from such canonical dynamics in the cortico-hippocampal network may underlie differences in navigational memory across individuals and its decline in aging. 76 participants (42 females) across two age groups (young: 20-30 years, aging: 50-65 years) watched 24 different 1-min
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