Document Detail

Birth hypoxia and spinal reflex in newborn babies.
MedLine Citation:
PMID:  15773266     Owner:  NLM     Status:  MEDLINE    
Birth hypoxia is detrimental to neuronal function. In this study, its effect on spinal monosynaptic reflex was investigated on two different age groups of human newborn babies using few non-invasive electrophysiological parameters. A total of 57 newborns (25 hypoxic + 32 non-hypoxic) were the study subject. Out of which, 31 newborns (11 hypoxic + 20 non-hypoxic) were examined within 48 hours of birth, and the rest 26 (14 hypoxic + 12 non-hypoxic) were examined between 48h and 120h (five days) of birth. H-reflex latency (HRL), distal motor latency (DL), and H-reflex conduction velocity (HRCV), were estimated for understanding the transmission of impulse in the monosynaptic reflex pathway. Moreover, Hmax, Mmax, and H/M ratio were observed for studying the spinal motor neuronal excitability. The injurious effect of hypoxia was detected on HRL, HRCV, Hmax and H/M ratio in babies who were examined within 48h of birth. The HRL was significantly increased and other parameters were significantly reduced. In the older group of babies, however, Hmax was the only parameter affected by hypoxia. The relatively older babies of hypoxic or non-hypoxic group had higher Hmax and H/M ratio compared to younger ones of their own group.
U Prakash; B Sinha; B D Bhatia
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Electromyography and clinical neurophysiology     Volume:  45     ISSN:  0301-150X     ISO Abbreviation:  Electromyogr Clin Neurophysiol     Publication Date:    2005 Jan-Feb
Date Detail:
Created Date:  2005-03-18     Completed Date:  2005-05-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0327533     Medline TA:  Electromyogr Clin Neurophysiol     Country:  Belgium    
Other Details:
Languages:  eng     Pagination:  59-63     Citation Subset:  IM    
Department of Physiology, Institute of Medical Sciences, Banaras Hindu University, Varanasi -221 005, India.
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MeSH Terms
Action Potentials / physiology
Age Factors
Anoxia / etiology,  physiopathology*
Asphyxia Neonatorum / complications,  physiopathology
Case-Control Studies
H-Reflex / physiology*
Infant, Newborn
Neural Conduction / physiology
Reaction Time / physiology
Tibial Nerve / physiopathology*

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

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