Publications

Authors:

Sani, Ilaria; Santandrea, Elisa; Golzar, A.; Morrone, M. C.; Chelazzi, Leonardo

Title:

Selective tuning for contrast in macaque area V4

Year:

2013

Type of item:

Articolo in Rivista

Tipologia ANVUR:

Articolo su rivista

Language:

Inglese

Format:

A Stampa

Referee:

Sì

Name of journal:

Journal of Neuroscience

ISSN of journal:

0270-6474

N° Volume:

33

Number or Folder:

47

:

Society for Neuroscience

Page numbers:

18583-18596

Keyword:

Luminance contrast; macaque area V4d; monotonic and non-monotonic contrast response functions; selective tuning for contrast; temporal dynamics of contrast selectivity

Short description of contents:

Visually responsive neurons typically exhibit a monotonic-saturating increase of firing with luminance contrast of the stimulus and are able to adapt to the current spatiotemporal context by shifting their selectivity, therefore being perfectly suited for optimal contrast encoding and discrimination. Here we report the first evidence of the existence of neurons showing selective tuning for contrast in area V4d of the behaving macaque (Macaca mulatta), i.e., narrow bandpass filter neurons with peak activity encompassing the whole range of visible contrasts and pronounced attenuation at contrasts higher than the peak. Crucially, we found that contrast tuning emerges after a considerable delay from stimulus onset, likely reflecting the contribution of inhibitory mechanisms. Selective tuning for luminance contrast might support multiple functions, including contrast identification and the attentive selection of low contrast stimuli.

Web page:

http://dx.doi.org/10.1523/JNEUROSCI.3465-13.2013

Product ID:

78683

Handle IRIS:

11562/635153

Deposited On:

November 22, 2013

Last Modified:

November 14, 2022

Bibliographic citation:

Sani, Ilaria; Santandrea, Elisa; Golzar, A.; Morrone, M. C.; Chelazzi, Leonardo, Selective tuning for contrast in macaque area V4 «Journal of Neuroscience» , vol. 33 , n. 47 , 2013 , pp. 18583-18596

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