Document Detail

Muscle tendon unit comparisons between infants born preterm and infants born full term: a pilot study.
MedLine Citation:
PMID:  18004199     Owner:  NLM     Status:  MEDLINE    
PURPOSE: This study assessed differences in measures of the muscle tendon unit between infants born preterm and infants born full-term. METHODS: Twenty infants born between 26 and 36 weeks of gestation comprised the preterm group and 21 infants born between 38 and 42 weeks of gestation comprised the full-term group. Gastrocnemius-soleus measurements were obtained with a taut tendon and relaxed muscle belly (Ao), and with a taut tendon and elongated muscle belly (Amax). Muscle extensibility measurements were obtained with a goniometer. Ao to Amax was the difference between Ao and Amax measurements. RESULTS: Statistically significant differences were found for both measures of muscle extensibility, but not for the difference between these measures. The preterm group demonstrated measures of Ao and Amax in more extended ankle positions. CONCLUSION: Muscle length differences are present between infants born full-term and infants born preterm. These differences are most likely due to differences in tendon length.
Marybeth Grant Beuttler; Patricia A Shewokis
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Pediatric physical therapy : the official publication of the Section on Pediatrics of the American Physical Therapy Association     Volume:  19     ISSN:  0898-5669     ISO Abbreviation:  Pediatr Phys Ther     Publication Date:  2007  
Date Detail:
Created Date:  2007-11-16     Completed Date:  2008-02-12     Revised Date:  2008-03-30    
Medline Journal Info:
Nlm Unique ID:  8912748     Medline TA:  Pediatr Phys Ther     Country:  United States    
Other Details:
Languages:  eng     Pagination:  309-14     Citation Subset:  IM    
Department of Physical Therapy, Chapman University, Orange, California 92866, USA.
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MeSH Terms
Infant, Newborn / physiology*
Infant, Premature / physiology*
Muscle Contraction
Muscle Relaxation
Muscle, Skeletal / physiology*,  physiopathology
Pilot Projects
Range of Motion, Articular
Tendons / physiology*,  physiopathology
Term Birth

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