Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 561742
Title Dynamics of directional selectivity in MT receptive field centre and surround
Author(s) Perge, János A.; Borghuis, Bart G.; Bours, Roger J.E.; Lankheet, Martin J.M.; Wezel, Richard J.A. Van
Source European Journal of Neuroscience 22 (2005)8. - ISSN 0953-816X - p. 2049 - 2058.
DOI https://doi.org/10.1111/j.1460-9568.2005.04363.x
Publication type Refereed Article in a scientific journal
Publication year 2005
Keyword(s) Electrophysiology - Extrastriate cortex - Macaque monkey - Middle temporal area - Motion perception
Abstract

We studied receptive field organization of motion-sensitive neurons in macaque middle temporal cortical area (MT), by mapping direction selectivity in space and in time. Stimuli consisted of pseudorandom sequences of single motion steps presented simultaneously at many different receptive field locations. Spatio-temporal receptive field profiles were constructed by cross-correlating stimuli and spikes. The resulting spike-triggered averages revealed centre-surround organization. The temporal dynamics of the receptive fields were generally biphasic with increased probability for the preferred direction at short latency (50-70 ms) and decreased probability at longer latency (80-100 ms). The response latency of the receptive field surround was on average 16 ms longer than that of the centre. Our results show that surround input and biphasic behaviour reflect two different mechanisms, which make MT cells specifically sensitive to motion contrast in space and time.

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