Related Experiment Video
Updated: Jul 19, 2026
07:11
Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
Published on: December 8, 2023
Eye position-dependent activity in the primary visual area as revealed by fMRI
Frédéric Andersson1, Marc Joliot, Guy Perchey
1Groupe d'Imagerie Neurofonctionnelle (GIN), UMR6194, CNRS, CEA, Université Paris 5, GIP CYCERON, Caen, France.
Human Brain Mapping
|November 8, 2006
Summary
Eye position influences activity in the primary visual cortex (V1), the earliest stage of visual processing. This suggests that V1 is involved in integrating contextual information for visual perception and action.
Area of Science:
- Neuroscience
- Visual Perception
- Cognitive Neuroscience
Background:
- Internal senses of eye position may impact cognitive processes for movement and action guidance.
- Neuroimaging shows eye position-dependent activity in higher visual areas, but V1's role is unclear.
Purpose of the Study:
- To investigate the effect of eye position on activity in the primary visual area (V1).
- To determine if V1 is involved in early visual processing influenced by eye position.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed.
- V1 activity was measured during quarter-field visual checkerboard stimulation.
- The influence of eye position on V1 response amplitude was analyzed.
Main Results:
- V1 activity amplitude was modulated by eye position.
- Maximal V1 activity occurred when eye and head positions were aligned.
- This indicates contextual influences on V1 activity.
Conclusions:
- Eye position affects an early stage of visual processing in V1.
- V1 may play a role in integrating contextual information beyond basic visual input.
- This finding contributes to understanding the interplay between sensory-motor systems and early visual processing.
