Document Detail

The saccadic system does not compensate for the immaturity of the smooth pursuit system during visual tracking in children.
MedLine Citation:
PMID:  23615545     Owner:  NLM     Status:  Publisher    
Motor skills improve with age from childhood into adulthood and this improvement is reflected in the performance of smooth pursuit eye movements. In contrast, the saccadic system becomes mature earlier than the smooth pursuit system. Therefore, the present study investigates whether the early mature saccadic system compensates for the lower pursuit performance during childhood. To answer this question, horizontal eye movements were recorded in 58 children (ages 5-16) and 16 adults (ages 23-36) in a task that required the combination of smooth pursuit and saccadic eye movements. Smooth pursuit performance improved with age. However, children had larger average position error during target tracking compared to adults but they did not execute more saccades to compensate for their low pursuit performance despite the early maturity of their saccadic system. This absence of error correction suggests that children have a lower sensitivity to visual errors compared to adults. This reduced sensitivity might stem from poor internal models and longer processing time in young children.
Caroline Ego; Jean-Jacques Orban de Xivry; Marie-Cecile Nassogne; Demet Yüksel; Philippe Lefévre
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-4-24
Journal Detail:
Title:  Journal of neurophysiology     Volume:  -     ISSN:  1522-1598     ISO Abbreviation:  J. Neurophysiol.     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-4-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375404     Medline TA:  J Neurophysiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
1Universite catholique de Louvain.
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