Document Detail

Physical exercise and cognitive recovery in acquired brain injury: a review of the literature.
MedLine Citation:
PMID:  19627946     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Physical exercise has been shown to play an ever-broadening role in the maintenance of overall health and has been implicated in the preservation of cognitive function in both healthy elderly and demented populations. Animal and human studies of acquired brain injury (ABI) from trauma or vascular causes also suggest a possible role for physical exercise in enhancing cognitive recovery. DATA SOURCES: A review of the literature was conducted to explore the current understanding of how physical exercise impacts the molecular, functional, and neuroanatomic status of both intact and brain-injured animals and humans. STUDY SELECTION: Searches of the MEDLINE, CINHAL, and PsychInfo databases yielded an extensive collection of animal studies of physical exercise in ABI. Animal studies strongly tie physical exercise to the upregulation of multiple neural growth factor pathways in brain-injured animals, resulting in both hippocampal neurogenesis and functional improvements in memory. DATA EXTRACTION: A search of the same databases for publications involving physical exercise in human subjects with ABI yielded 24 prospective and retrospective studies. DATA SYNTHESIS: Four of these evaluated cognitive outcomes in persons with ABI who were involved in physical exercise. Three studies cited a positive association between exercise and improvements in cognitive function, whereas one observed no effect. Human exercise interventions varied greatly in duration, intensity, and level of subject supervision, and tools for assessing neurocognitive changes were inconsistent. CONCLUSIONS: There is strong evidence in animal ABI models that physical exercise facilitates neurocognitive recovery. Physical exercise interventions are safe in the subacute and rehabilitative phases of recovery for humans with ABI. In light of strong evidence of positive effects in animal studies, more controlled, prospective human interventions are warranted to better explore the neurocognitive effects of physical exercise on persons with ABI.
Jennifer M Devine; Ross D Zafonte
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  PM & R : the journal of injury, function, and rehabilitation     Volume:  1     ISSN:  1934-1482     ISO Abbreviation:  PM R     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2009-07-24     Completed Date:  2009-10-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101491319     Medline TA:  PM R     Country:  United States    
Other Details:
Languages:  eng     Pagination:  560-75     Citation Subset:  IM    
Department of Physical Medicine & Rehabilitation, Spaulding Rehabilitation Hospital, Harvard Medical School, Boston, MA, USA.
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MeSH Terms
Brain Injuries / complications,  rehabilitation*
Cognition Disorders / etiology,  rehabilitation*
Disease Models, Animal
Exercise Therapy / methods*
Stroke / complications,  rehabilitation*

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

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