en
Doctoral thesis
Open access
English

Cognitive modulations of early visual cortex activity in humans

ContributorsRauss, Karsten
Defense date2010-01-08
Abstract

The experiments conducted for this thesis examined the earliest stages of processing in human visual cortex. Using electroencephalographic recordings, it was observed that the first component of the visual evoked potential, the so-called C1, is affected by learning and attention. This contrasts with earlier studies which overwhelmingly reported no effects of higher cognitive processes on early visual cortex activity. It is suggested that methodological improvements such as the adaptation of stimulus parameters to the physiological characteristics of lower visual areas partly explain the new findings. Together with other recent studies, these results show that previously prevalent notions of primary visual cortex (V1) as an inflexible module for the treatment of low-level stimulus characteristics may need to be revised. The idea that V1 can act as an adaptive and flexible processor, previously based on animal studies, is thus starting to gain support from the human literature.

eng
Keywords
  • Attention
  • C1
  • EEG
  • Perceptual learning
  • VEP
  • Vision
NoteDiplôme commun des univ. de Genève et Lausanne
Citation (ISO format)
RAUSS, Karsten. Cognitive modulations of early visual cortex activity in humans. 2010. doi: 10.13097/archive-ouverte/unige:5654
Main files (1)
Thesis
accessLevelPublic
Identifiers
708views
1134downloads

Technical informations

Creation03/12/2010 2:41:00 PM
First validation03/12/2010 2:41:00 PM
Update time03/14/2023 3:26:01 PM
Status update03/14/2023 3:26:01 PM
Last indexation05/02/2024 11:31:04 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack