Development and function of lateralization in the avian brain.

Rogers, Lesley J. (2008) Development and function of lateralization in the avian brain.. Brain Research Bulletin, 76 3: 235-244. doi:10.1016/j.brainresbull.2008.02.001


Author Rogers, Lesley J.
Title Development and function of lateralization in the avian brain.
Journal name Brain Research Bulletin   Check publisher's open access policy
ISSN 0361-9230
1873-2747
Publication date 2008
Year available 2008
Sub-type Article (original research)
DOI 10.1016/j.brainresbull.2008.02.001
Open Access Status
Volume 76
Issue 3
Start page 235
End page 244
Total pages 10
Place of publication Philadelphia, PA United States
Publisher Elsevier Inc.
Collection year 2008
Language eng
Formatted abstract
The avian brain is functionally lateralized. Different strategies of choice (within and between modalities) are adopted by each hemisphere. Visual lateralization has been studied most but attention to auditory, olfactory and magnetic cues is also lateralized. The left hemisphere (LH) focuses on cues that reliably separate pertinent stimuli from distracting stimuli (e.g. food from pebbles, odour cues from attractive visual cues, magnetic cues from other cues indicating location), whereas the right hemisphere (RH) has broad attention and is easily distracted by novel stimuli. The RH also controls fear and escape responses, as in reaction to predators. Exposure of the embryo to light just before hatching, when the posture adopted occludes the left eye (LE) but not the right eye (RE), leads to the development of asymmetry in the visual projections to the pallium and enhances the ability of the RE/LH to inhibit attention to distracting visual cues and of the LH to inhibit the RH, but has no effect on the RH's interest in novelty. Exposure to light before hatching has both short- and long-term consequences that are important for species-typical behaviour and survival. For example, on a food search task with a predator presented overhead, dark-incubated chicks perform poorly on both aspects of the task, whereas light-exposed chicks have no difficulty. Steroid hormone levels prior to hatching modulate light-dependent development of asymmetry in the visual projections and consequently affect neural competence for parallel processing and response inhibition. Differences between lateralization in the chick and pigeon are discussed
Keyword Behavioural lateralization
Brain Lateralization
Function of lateralization
Light exposure
Steroid hormones
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes For ERA

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Brain Institute Publications
 
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Created: Fri, 24 Oct 2014, 16:06:23 EST by Debra McMurtrie on behalf of Queensland Brain Institute