Document Detail

Influence of central command on cerebral blood flow at the onset of exercise in women.
MedLine Citation:
PMID:  19648481     Owner:  NLM     Status:  MEDLINE    
This study evaluated the role of central command in the regulation of common carotid artery blood flow and middle cerebral artery mean flow velocity (V(MCA)) at the onset of arm exercise. Eleven young women performed 2 min voluntary elbow flexion and extension exercise with no load (VOL) that was considered to activate both central command and the muscle mechanoreflex, and 2 min passive elbow flexion and extension exercise (PAS) that was considered to activate only the muscle mechanoreflex. Immediately before the onset of VOL, and V(MCA) began to increase from the baseline and peaked 5 s thereafter (mean +/- s.d.; 20 +/- 5 and 14 +/- 5%, respectively; P < 0.05). Also, VOL increased heart rate (9 +/- 2%; P < 0.05) and cardiac output (16 +/- 3%; P < 0.05). Indexes of the cerebrovascular resistance (MAP/ and MAP/V(MCA)) were reduced at the onset of VOL (13 +/- 4 and 12 +/- 4%, respectively; P < 0.05). However, there were no significant changes in these parameters during PAS. These results suggest that central command plays an important role in the increase of cerebral blood flow at the onset of voluntary exercise.
Kohei Sato; Mayumi Moriyama; Tomoko Sadamoto
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-07-31
Journal Detail:
Title:  Experimental physiology     Volume:  94     ISSN:  1469-445X     ISO Abbreviation:  Exp. Physiol.     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2009-10-19     Completed Date:  2009-12-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9002940     Medline TA:  Exp Physiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1139-46     Citation Subset:  IM    
Research Institute of Physical Fitness, Japan Women's College of Physical Education, Tokyo, 157-8565, Japan.
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MeSH Terms
Blood Pressure / physiology
Cardiac Output / physiology
Carotid Arteries / physiology,  ultrasonography
Central Nervous System / physiology*,  ultrasonography
Cerebrovascular Circulation / physiology*
Exercise / physiology*
Heart Rate / physiology
Middle Cerebral Artery / physiology,  ultrasonography
Respiratory Mechanics / physiology
Vascular Resistance / physiology
Young Adult

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