| Central command and the increase in middle cerebral artery blood flow velocity during static arm exercise in women. | |
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MedLine Citation:
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PMID: 19648482 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We examined the role of central command in static exercise-induced increase in middle cerebral artery mean blood flow velocity (V(MCA)). Eleven young female subjects performed static elbow flexion for 2 min at 30% maximal voluntary contraction without (control exercise; CONT) and with vibrations to the biceps brachii tendon (EX+VIB) in order to reduce the effort needed to maintain the set contraction intensity. The rating of perceived exertion in exercising muscle (Arm RPE) at the end of EX+VIB was lower than that of CONT (mean +/- s.d.; 4.8 +/- 1.1 for CONT versus 3.5 +/- 1.0 for EX+VIB; P < 0.05). The increases in mean arterial pressure (36 +/- 8 versus 22 +/- 7%; P < 0.05), heart rate (36 +/- 16 versus 21 +/- 7%; P < 0.05) and cardiac output (56 +/- 26 versus 39 +/- 14%; P < 0.05) during EX+VIB were also lower than those during CONT. Similarly, the increase in the V(MCA) during EX+VIB was lower than that during CONT (29 +/- 5 versus 17 +/- 14%; P < 0.05). These results suggest that the influence of central command contributes to cerebral blood flow regulation during static exercise and the decrease in V(MCA) is likely to be caused by attenuated brain activation in the central command network and/or by the reduction in cardiac output. |
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Authors:
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Kohei Sato; Tomoko Sadamoto; Chihoko Ueda-Sasahara; Kenichi Shibuya; Shizuyo Shimizu-Okuyama; Takuya Osada; Mifuyu Kamo; Mitsuru Saito; Atsuko Kagaya |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-07-31 |
Journal Detail:
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Title: Experimental physiology Volume: 94 ISSN: 1469-445X ISO Abbreviation: Exp. Physiol. Publication Date: 2009 Nov |
Date Detail:
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Created Date: 2009-10-19 Completed Date: 2009-12-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9002940 Medline TA: Exp Physiol Country: England |
Other Details:
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Languages: eng Pagination: 1132-8 Citation Subset: IM |
Affiliation:
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Research Institute of Physical Fitness, Japan Women's College of Physical Education, Kita-Karasuyama, Setagaya-ku, Tokyo, 157-8565, Japan. ksato@jwcpe.ac.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Arm / blood supply, physiology Blood Pressure / physiology Cardiac Output / physiology Central Nervous System / physiology* Cerebrovascular Circulation / physiology* Exercise / physiology* Female Heart Rate / physiology Humans Middle Cerebral Artery / physiology* Muscle Contraction / physiology Muscle Spindles / physiology Regional Blood Flow / physiology Tendons / physiology Young Adult |
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