RT Journal Article
SR Electronic
T1 Tracking the dynamics of perisaccadic visual signals with magnetoencephalography
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2022.01.19.476936
DO 10.1101/2022.01.19.476936
A1 Nasiotis, Konstantinos
A1 Neupane, Sujaya
A1 Bakhtiari, Shahab
A1 Baillet, Sylvain
A1 Pack, Christopher C.
YR 2022
UL http://biorxiv.org/content/early/2022/01/21/2022.01.19.476936.abstract
AB Many brain functions are difficult to localize, as they involve distributed networks that reconfigure themselves on short timescales. One example is the integration of oculomotor and visual signals that occurs with each eye movement: The brain must combine motor signals about the eye displacement with retinal signals, to infer the structure of the surrounding environment. Our understanding of this process comes primarily from single-neuron recordings, which are limited in spatial extent, or fMRI measurements, which have poor temporal resolution. We have therefore studied visual processing during eye movements, using magnetoencephalography (MEG), which affords high spatiotemporal resolution. Human subjects performed a task in which they reported the orientation of a visual stimulus while executing a saccade. After removal of eye movement artifacts, time-frequency analysis revealed a signal that propagated in the beta-frequency band from parietal cortex to visual cortex. This signal had the characteristics of perisaccadic “remapping”, a neural signature of the integration of oculomotor and visual signals. These results reveal a novel mechanism of visual perception and demonstrate that MEG can provide a useful window into distributed brain functions.Competing Interest StatementThe authors have declared no competing interest.