TY  - INPR
A1  - Lisitsyn, Dmitriy
A1  - Grothe, Iris
A1  - Kreiter, Andreas K.
A1  - Ernst, Udo A.
T1  - Signal transfer of visual stimuli to V4 occurs in gamma-rhythmic, pulsed information packages
T2  - bioRxiv
N2  - Summary Selective visual attention allows the brain to focus on behaviorally relevant information while ignoring irrelevant signals. As a possible mechanism, routing by synchronization was proposed: neural populations sending attended signals align their gamma-rhythmic activities with receiving populations, such that spikes from the senders arrive at excitability peaks of the receivers, enhancing signal transfer. Conversely, the non-attended signals arrive unaligned to the receiver’s oscillation, reducing signal transfer. Therefore, visual signals should be transferred through periodically pulsed information packages, resulting in a modulation of the stimulus content within the receiver’s activity by its gamma phase and amplitude. To test this prediction, we quantified gamma phase-specific stimulus content within neural activity from area V4 of macaques performing a visual attention task. For the attended stimulus we find enhanced stimulus content reaching its maximum near excitability peaks, with effect magnitude increasing with oscillation amplitude, establishing a functional link between selective processing and gamma activity.
Y1  - 2020
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/72687
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-726874
IS  - 2020.02.03.931956
ER  -