Document Detail


Temporal summation in dark-adapted 10-week old infants.
MedLine Citation:
PMID:  1891817     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effect of stimulus duration on the b-wave and psychophysical responses of dark-adapted 10-week-old infants and adult control subjects is reported. Both infant and adult b-wave sensitivities vary with stimulus duration, show summation for brief duration stimuli, critical durations estimated at 88-155 msec, and little variation in sensitivity for longer durations. There are however, substantial differences between the infant and adult psychophysical temporal summation functions. The infant function is described by a straight line, slope about -0.5, across all flash durations while adults show summation at durations less than 100 msec and critical durations of 136 to 151 msec. Adult, but not infant, b-wave integration times and b-wave rise and fall times show duration-dependent changes. Thus, both ERG and psychophysical measures demonstrate immaturities in the rod mediated function of the infant retina.
Authors:
A B Fulton; R M Hansen; Y L Yeh; C W Tyler
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  31     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1991  
Date Detail:
Created Date:  1991-10-15     Completed Date:  1991-10-15     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1259-69     Citation Subset:  IM    
Affiliation:
Department of Opthalmology, Children's Hospital, Boston, MA 02115.
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MeSH Terms
Descriptor/Qualifier:
Adult
Dark Adaptation / physiology*
Electroretinography
Female
Humans
Infant
Male
Photic Stimulation
Photometry
Psychophysics
Retina / physiology*
Sensory Thresholds / physiology
Time Factors
Grant Support
ID/Acronym/Agency:
EY 05325/EY/NEI NIH HHS; EY 06555/EY/NEI NIH HHS; EY 06579/EY/NEI NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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