Document Detail

Responsiveness to terrestrial optic flow in infancy: does locomotor experience play a role?
MedLine Citation:
PMID:  16442177     Owner:  NLM     Status:  MEDLINE    
Human infants show a peak in postural compensation to optic flow at approximately nine months of age. The current experiment tested whether the magnitude of visual-postural coupling in 9-month-olds increases when terrestrial optic flow is added to a moving room. A secondary objective was to explore whether locomotor experience plays any role in enhancing responsiveness to the additional terrestrial information. Ninety-one infants (experienced creepers, nascent creepers, and prelocomotors) were exposed to two conditions of optic flow: global optic flow (G) and global optic flow minus terrestrial optic flow (G-T). The additional terrestrial optic flow led to significantly higher visual-postural coupling. Consistent with previous findings, locomotor experience had no effect on responsiveness to the G-T condition, though there was weak evidence that the nascent creepers were more strongly influenced by the difference between flow conditions than the other infants. Unexpectedly, the prelocomotor females showed significantly lower visual-postural coupling than the prelocomotor males. These findings support the notion that the ground provides an important source of information for the control of posture and locomotion. The findings also suggest that locomotor experience most likely helps to functionalize smaller (partial), rather than larger (global), optic flow fields for postural control.
Laure Lejeune; David I Anderson; Joseph J Campos; David C Witherington; Ichiro Uchiyama; Marianne Barbu-Roth
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2006-01-25
Journal Detail:
Title:  Human movement science     Volume:  25     ISSN:  0167-9457     ISO Abbreviation:  Hum Mov Sci     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-02-13     Completed Date:  2006-06-28     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8300127     Medline TA:  Hum Mov Sci     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  4-17     Citation Subset:  IM    
Institute of Human Development, University of California, Berkeley, Tolman Hall, Berkeley, 94720-1690, USA.
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MeSH Terms
Locomotion / physiology*
Psychomotor Performance / physiology*
Sensation / physiology*
Vision, Ocular / physiology
Grant Support

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