TY  - JOUR
A1  - Peter, Alina
A1  - Uran, Cem
A1  - Klon-Lipok, Johanna
A1  - Roese, Rasmus
A1  - Stijn, Sylvia van
A1  - Barnes, William
A1  - Dowdall, Jarrod Robert
A1  - Singer, Wolf
A1  - Fries, Pascal
A1  - Vinck, Martin
T1  - Surface color and predictability determine contextual modulation of V1 firing and gamma oscillations
T2  - eLife
N2  - The integration of direct bottom-up inputs with contextual information is a core feature of neocortical circuits. In area V1, neurons may reduce their firing rates when their receptive field input can be predicted by spatial context. Gamma-synchronized (30–80 Hz) firing may provide a complementary signal to rates, reflecting stronger synchronization between neuronal populations receiving mutually predictable inputs. We show that large uniform surfaces, which have high spatial predictability, strongly suppressed firing yet induced prominent gamma synchronization in macaque V1, particularly when they were colored. Yet, chromatic mismatches between center and surround, breaking predictability, strongly reduced gamma synchronization while increasing firing rates. Differences between responses to different colors, including strong gamma-responses to red, arose from stimulus adaptation to a full-screen background, suggesting prominent differences in adaptation between M- and L-cone signaling pathways. Thus, synchrony signaled whether RF inputs were predicted from spatial context, while firing rates increased when stimuli were unpredicted from context.
KW  - research article
KW  - neuroscience
KW  - color vision
KW  - gamma oscillations
KW  - efficient coding
KW  - surround suppression
KW  - predictive coding
KW  - contextual modulation
KW  - rhesus macaque
Y1  - 2019
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/52990
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-529900
SN  - 2050-084X
N1  - Copyright Peter et al. This article is distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use and redistribution provided that the original author and source are credited
VL  - 8
IS  - e42101
SP  - 1
EP  - 38
PB  - eLife Sciences Publications
CY  - Cambridge
ER  -