ISSN:
1432-1106
Keywords:
Rabbit
;
Binocular vision
;
Cortical receptive fields
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary Using standard electrophysiological techniques, 130 neurons were recorded from the binocular region of the paralysed, unanesthetised rabbit's visual cortex. Their receptive fields were categorised into 5 major classes: stationary, motion sensitive, direction selective, double-direction selective and indefinite. The majority of the preferred directions of all direction and double direction selective receptive fields were located within±10° of horizontal or vertical. Of the 130 neurons studied, 104 (79%) were binocular and 50% of these binocular neurons had non-identical receptive fields on the two retinae. The dominance distribution for these binocular neurons revealed a strong tendency toward contralateral dominance, and no ipsilateral monocular neurons were found. The retinal locations of the receptive fields of these binocular neurons extended from 51° to 84° posterior to the optic disc. The ranges of relative horizontal and vertical “disparity” were calculated for all well-defined binocular receptive fields and found to be 24.5° and 21°, respectively. No evidence of “columnar organisation” was seen for the visual cortex of the rabbit. These data are contrasted to similar data on the binocular visual system of the cat, and are also interpreted as evidence of the need for interactions among large populations of neurons within the visual cortex of the rabbit.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00238533
Permalink