Document Detail

The development of symmetrical OKN in infants: quantification based on OKN acuity for nasalward versus temporalward motion.
MedLine Citation:
PMID:  10820624     Owner:  NLM     Status:  MEDLINE    
We quantified OKN asymmetry in 140 normal infants, 3-24 months old, by varying spatial frequency to determine OKN acuity for temporal-to-nasal (T-N) versus nasal-to-temporal (N-T) motion. At all ages, OKN acuity was asymmetrical (better for T-N than for N-T motion) but the size of the asymmetry decreased from 3.2 to 0.7 octaves between 3-24 months, primarily because of improvements in OKN acuity for N-T motion. The results suggest that immaturities in the cortical pathways involved in OKN persist until at least 2 years of age.
T L Lewis; D Maurer; J Y Chung; R Holmes-Shannon; C S Van Schaik
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  40     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  2000  
Date Detail:
Created Date:  2000-06-06     Completed Date:  2000-06-06     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  445-53     Citation Subset:  IM; S    
Department of Psychology, McMaster University, Hamilton, Ont., Canada.
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MeSH Terms
Child Development / physiology*
Child, Preschool
Nystagmus, Optokinetic / physiology*
Vision, Monocular / physiology
Visual Cortex / physiology
Visual Pathways / physiology
Grant Support

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