| POSSIBLE CUES DRIVING CONTEXT-SPECIFIC ADAPTATION OF OPTOCOLLIC REFLEX IN PIGEONS (Columba livia). | |
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MedLine Citation:
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PMID: 22049337 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Context-specific adaptation (Shelhamer and Clendaniel 2002) explains that reflexive responses can be maintained with different 'calibrations' for different situations (contexts). Which context cues are crucial and how they combine to evoke context-specific adaptation is not fully understood. Gaze stabilization in birds is a nice model to tackle with that question. Previous data showed that when pigeons (Columba livia) were hung in a harness and subjected to a frontal air-stream provoking a flying posture ('flying condition'), the working range of the optokinetic head response (OCR) extended toward higher velocities as compared to the 'resting condition'. The present study was aimed at identifying which context cues are instrumental to recalibrate the OCR. We investigated that question by using vibrating stimuli delivered during the OCR provoked by rotating the visual surroundings at different velocities. The OCR gain increase and the boost of the fast phase velocity observed during the 'flying condition' were mimicked by body vibration. On the other hand, the newly emerged relationship between the fast phase and the slow phase velocities in the 'flying condition' was mimicked by head vibration. Spinal cord lesion at the lumbosacral level decreased the effects of body vibration whereas lesions of the lumbosacral apparatus had no effect. Our data suggest a major role of the muscular proprioception in the context-specific adaptation of the stabilizing behavior while the vestibular system could contribute to the context-specific adaptation of the orienting behavior. A participation of an efferent copy of the motor command driving the flight cannot be excluded. |
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Authors:
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Henri Gioanni; Pierre-Paul Vidal |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-2 |
Journal Detail:
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Title: Journal of neurophysiology Volume: - ISSN: 1522-1598 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-11-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375404 Medline TA: J Neurophysiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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1Université Paris Descartes. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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