Prehatching visual experience and lateralization in the visual Wulst of the chick

Title
Prehatching visual experience and lateralization in the visual Wulst of the chick
Publication Date
2002
Author(s)
Deng, Chao
Rogers, Lesley
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
Elsevier BV
Place of publication
Netherlands
DOI
10.1016/S0166-4328(02)00050-5
UNE publication id
une:11185
Abstract
We revealed functional lateralization of the chick visual system by placing injections of monosodium glutamate (0.5 μl, 100 mM) into the left or right Wulst regions of the hemispheres, and examined the effects of light experience before hatching on this lateralization. Following exposure of the left or right eye to light for 24 h beginning on day 18 of incubation, the chick's ability to categorise grain as distinct from pebbles was impaired by glutamate treatment of the Wulst contralateral to the exposed eye. Attack and copulation scores were also elevated. Following incubation of the eggs in darkness or with both eyes exposed to light, treatment of neither the left or right Wulst affected performance on the pebble-grain task: showing that either the left and right Wulst can assume control of this function. Treatment of either the left or right Wulst of these chicks elevates attack and copulation. However, examination of the distribution of attack scores revealed a bimodality in the attack scores of the chick.
Link
Citation
Behavioural Brain Research, 134(1-2), p. 375-385
ISSN
1872-7549
0166-4328
Start page
375
End page
385

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