LIVIVO - Das Suchportal für Lebenswissenschaften

switch to English language
Erweiterte Suche

Suchergebnis

Treffer 1 - 1 von insgesamt 1

Suchoptionen

Artikel ; Online: The representation of occluded image regions in area V1 of monkeys and humans.

Papale, Paolo / Wang, Feng / Morgan, A Tyler / Chen, Xing / Gilhuis, Amparo / Petro, Lucy S / Muckli, Lars / Roelfsema, Pieter R / Self, Matthew W

Current biology : CB

2023  Band 33, Heft 18, Seite(n) 3865–3871.e3

Abstract: Neuronal activity in the primary visual cortex (V1) is driven by feedforward input from within the neurons' receptive fields (RFs) and modulated by contextual information in regions surrounding the RF. The effect of contextual information on spiking ... ...

Abstract Neuronal activity in the primary visual cortex (V1) is driven by feedforward input from within the neurons' receptive fields (RFs) and modulated by contextual information in regions surrounding the RF. The effect of contextual information on spiking activity occurs rapidly and is therefore challenging to dissociate from feedforward input. To address this challenge, we recorded the spiking activity of V1 neurons in monkeys viewing either natural scenes or scenes where the information in the RF was occluded, effectively removing the feedforward input. We found that V1 neurons responded rapidly and selectively to occluded scenes. V1 responses elicited by occluded stimuli could be used to decode individual scenes and could be predicted from those elicited by non-occluded images, indicating that there is an overlap between visually driven and contextual responses. We used representational similarity analysis to show that the structure of V1 representations of occluded scenes measured with electrophysiology in monkeys correlates strongly with the representations of the same scenes in humans measured with functional magnetic resonance imaging (fMRI). Our results reveal that contextual influences rapidly alter V1 spiking activity in monkeys over distances of several degrees in the visual field, carry information about individual scenes, and resemble those in human V1. VIDEO ABSTRACT.
Mesh-Begriff(e) Animals ; Humans ; Visual Perception/physiology ; Haplorhini ; Primary Visual Cortex ; Visual Cortex/physiology ; Visual Fields ; Photic Stimulation/methods
Sprache Englisch
Erscheinungsdatum 2023-08-28
Erscheinungsland England
Dokumenttyp Video-Audio Media ; Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID 1071731-6
ISSN 1879-0445 ; 0960-9822
ISSN (online) 1879-0445
ISSN 0960-9822
DOI 10.1016/j.cub.2023.08.010
Signatur
Zs.A 3208: Hefte anzeigen Standort:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (2.OG)
ab Jg. 2022: Lesesaal (EG)
Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

Zusatzmaterialien

Kategorien

Zum Seitenanfang