Document Detail

Neural mechanism and clinical significance of the plantar grasp reflex in infants.
MedLine Citation:
PMID:  20610116     Owner:  NLM     Status:  MEDLINE    
The plantar grasp reflex can be elicited in all normal infants from 25 weeks of postconceptional age until the end of 6 months of corrected age according to the expected birth date. This reflex in human infants can be regarded as a rudiment of responses that were once essential for ape infants in arboreal life. The spinal center for this reflex is probably located at the L(5)-S(2) levels, which, however, are controlled by higher brain structures. Nonprimary motor areas may exert regulatory control of the spinal reflex mechanism through interneurons. In infants, this reflex can be elicited as the result of insufficient control of the spinal mechanism by the immature brain. In adults, lesions in nonprimary motor areas may cause a release of inhibitory control by spinal interneurons, leading to a reappearance of the reflex. The plantar grasp reflex in infants is of high clinical significance. A negative or diminished reflex during early infancy is often a sensitive indicator of spasticity. Infants with athetoid type cerebral palsy exhibit an extremely strong retention of the reflex, and infants with mental retardation also exhibit a tendency toward prolonged retention of the reflex.
Yasuyuki Futagi; Yasuhiro Suzuki
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Pediatric neurology     Volume:  43     ISSN:  1873-5150     ISO Abbreviation:  Pediatr. Neurol.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-07-08     Completed Date:  2011-01-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8508183     Medline TA:  Pediatr Neurol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  81-6     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier Inc. All rights reserved.
Department of Pediatric Neurology, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka 594-1101, Japan.
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MeSH Terms
Afferent Pathways / physiology
Child Development / physiology*
Hand Strength / physiology*
Infant, Newborn
Mental Retardation / physiopathology
Motor Cortex / physiology*
Muscle Spasticity / physiopathology
Reflex, Abnormal

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