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Relevant bibliographies by topics / Visual cortical areas / Dissertations / Theses

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Dissertations / Theses on the topic 'Visual cortical areas'

Author: Grafiati

Published: 11 March 2023

Last updated: 19 July 2025

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1

Ferro, Demetrio. "Effects of attention on visual processing between cortical layers and cortical areas V1 and V4." Doctoral thesis, Università degli studi di Trento, 2019. http://hdl.handle.net/11572/246290.

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Visual attention improves sensory processing, as well as perceptual readout and behavior. Over the last decades, many proposals have been put forth to explain how attention affects visual neural processing. These include the modulation of neural firing rates and synchrony, neural tuning properties, and rhythmic, subthreshold activity. Despite the wealth of knowledge provided by previous studies, the way attention shapes interactions between cortical layers within and between visual sensory areas is only just emerging. To investigate this, we studied neural signals from macaque V1 and V4 visual

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2

Heuer, Hilary Whetu. "Visual motion analysis in extrastriate cortical areas MT and MST /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.

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3

Ferro, Demetrio. "Effects of attention on visual processing between cortical layers and cortical areas V1 and V4." Doctoral thesis, Università degli studi di Trento, 2019. http://hdl.handle.net/11572/246290.

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Abstract:

Visual attention improves sensory processing, as well as perceptual readout and behavior. Over the last decades, many proposals have been put forth to explain how attention affects visual neural processing. These include the modulation of neural firing rates and synchrony, neural tuning properties, and rhythmic, subthreshold activity. Despite the wealth of knowledge provided by previous studies, the way attention shapes interactions between cortical layers within and between visual sensory areas is only just emerging. To investigate this, we studied neural signals from macaque V1 and V4 visual

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4

Knoblauch, Andreas [Verfasser]. "Synchronization and pattern separation in spiking associative memories and visual cortical areas / Andreas Knoblauch." Ulm : Universität Ulm. Fakultät für Informatik, 2004. http://d-nb.info/1015438466/34.

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5

Gieselmann, Marc Alwin. "The role of the primate cortical middle temporal area in visually guided hand movements." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97349655X.

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6

Tard, Céline. "Modulation corticale de la locomotion." Thesis, Lille 2, 2015. http://www.theses.fr/2015LIL2S067/document.

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Les patients atteints de maladie de Parkinson présentent des troubles de la marche, parfois paroxystiques, pouvant être aggravés ou améliorés par les stimuli environnementaux. L'attention portée, soit aux stimuli extérieurs, soit à la marche, pourrait ainsi moduler la locomotion.L’objectif principal était donc de mieux caractériser la manière dont les stimuli environnementaux modulent par le biais de réseaux attentionnels la locomotion. Ceci a été étudié chez les sujets sains puis chez les patients parkinsoniens, avec ou sans enrayage cinétique.Nous avons d'abord défini précisément les déficit

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7

McKeefry, D. J., M. P. Burton, C. Vakrou, B. T. Barrett, and A. B. Morland. "Induced deficits in speed perception by transcranial magnetic stimulation of human cortical areas V5/MT+ and V3A." 2008. http://hdl.handle.net/10454/6093.

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In this report, we evaluate the role of visual areas responsive to motion in the human brain in the perception of stimulus speed. We first identified and localized V1, V3A, and V5/MT+ in individual participants on the basis of blood oxygenation level-dependent responses obtained in retinotopic mapping experiments and responses to moving gratings. Repetitive transcranial magnetic stimulation (rTMS) was then used to disrupt the normal functioning of the previously localized visual areas in each participant. During the rTMS application, participants were required to perform delayed discrimination

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8

D'Souza, Dany V. [Verfasser]. "An fMRI study of chromatic processing in humans : spatial and temporal characteristics of the cortical visual areas / submitted by Dany V. D'Souza." 2009. http://d-nb.info/1000161021/34.

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9

Pedersini, Caterina Annalaura. "The neural basis of residual vision and attention in the blind field of hemianopic patients: behavioural, electrophysiological and neuroimaging evidence." Doctoral thesis, 2016. http://hdl.handle.net/11562/939354.

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L’emianopsia è un disturbo visivo caratterizzato da cecità in una porzione del campo, controlaterale alla sede di lesione che coinvolge il circuito visivo. Nonostante tale difficoltà, alcune abilità visive residue (“blindsight”) possono essere mantenute nel campo cieco; la probabilità di riscontrare tale fenomeno risulta incrementata dalla presentazione di stimoli in movimento che possono attivare l’area visiva motoria (hMT) senza passare dall’area visiva primaria (V1). Di conseguenza, un comportamento guidato dalla visione risulta possibile nel campo cieco, in assenza di consapevolezza percet

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10

Bair, Wyeth. "Analysis of temporal structure in spike trains of visual cortical area MT." Thesis, 1996. https://thesis.library.caltech.edu/7600/2/Bair%201996.pdf.

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<p>The temporal structure of neuronal spike trains in the visual cortex can provide detailed information about the stimulus and about the neuronal implementation of visual processing. Spike trains recorded from the macaque motion area MT in previous studies (Newsome et al., 1989a; Britten et al., 1992; Zohary et al., 1994) are analyzed here in the context of the dynamic random dot stimulus which was used to evoke them. If the stimulus is incoherent, the spike trains can be highly modulated and precisely locked in time to the stimulus. In contrast, the coherent motion stimulus creates li

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11

Zajac, Lauren Elizabeth. "The role of global motion perception and cortical visual motion area dynamics in visual path integration in cognitively intact aged adults." Thesis, 2019. https://hdl.handle.net/2144/38583.

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Spatial navigation is a cognitive skill fundamental to successful interaction with our environment. Normal aging is associated with weaknesses in this skill, with severe deficits in the context of Alzheimer's disease. Identifying mechanisms underlying how the aged brain navigates is important to understanding these age-related weaknesses and potentially strengthening or preserving spatial navigation ability in the aging population. One understudied aspect of spatial navigation is self-motion perception. Important to self-motion perception is optic flow, which is the pattern of visual motio

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12

Gieselmann, Marc Alwin [Verfasser]. "The role of the primate cortical middle temporal area in visually guided hand movements = Die Rolle des mediotemporalen Areals im Gehirn der Primaten bei visuell geführten Handbewegungen / von Marc Alwin Gieselmann." 2004. http://d-nb.info/97349655X/34.

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13

Mehrpour, Vahid. "The role of attention and adaptation in shaping cortical representations and the perception of abrupt changes in the visual environment." Doctoral thesis, 2017. http://hdl.handle.net/11858/00-1735-0000-0023-3F74-1.

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14

(10531388), Alexandr Pak. "CONTEXTUAL MODULATION OF NEURAL RESPONSES IN THE MOUSE VISUAL SYSTEM." Thesis, 2021.

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<div>The visual system is responsible for processing visual input, inferring its environmental causes, and assessing its behavioral significance that eventually relates to visual perception and guides animal behavior. There is emerging evidence that visual perception does not simply mirror the outside world but is heavily influenced by contextual information. Specifically, context might refer to the sensory, cognitive, and/or behavioral cues that help to assess the behavioral relevance of image features. One of the most famous examples of such behavior is visual or optical illusions. These ill

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15

Marshansky, Serguei. "Analyse des réponses neuronales du cortex visuel primaire du chat à la fréquence spatiale suite à des adaptations répétées." Thèse, 2010. http://hdl.handle.net/1866/4763.

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Les neurones du cortex visuel primaire (aire 17) du chat adulte répondent de manière sélective à différentes propriétés d’une image comme l’orientation, le contraste ou la fréquence spatiale. Cette sélectivité se manifeste par une réponse sous forme de potentiels d’action dans les neurones visuels lors de la présentation d’une barre lumineuse de forme allongée dans les champs récepteurs de ces neurones. La fréquence spatiale (FS) se mesure en cycles par degré (cyc./deg.) et se définit par la quantité de barres lumineuses claires et sombres présentées à une distance précise des yeux. Par ailleu

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