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Article: Differential effects of lower body negative pressure on forearm and calf blood flow

TitleDifferential effects of lower body negative pressure on forearm and calf blood flow
Authors
Issue Date1986
Citation
Journal Of Applied Physiology, 1986, v. 61 n. 3, p. 994-998 How to Cite?
AbstractModest degrees of lower body negative pressure (<20 mmHg) cause a reflex constriction of forearm resistance vessels attributable to a decrease in activity of cardiopulmonary mechanoreceptors. In the present study, we sought to determine whether the calf vessels respond similarly. Left forearm and right calf blood flows were measured simultaneously by strain-gauge plethysmography in 10 healthy volunteers. Forearm flows decreased significantly from control during negative pressures of 10, 15, or 20 mmHg, whereas calf flows did not increase significantly until 20 mmHg; at 10, 15, and 20 mmHg, decreases in forearm flow were significantly greater than those of the calf. Similar results were obtained in a second series of experiments in which venous pooling in the right leg during lower body negative pressure was prevented by enclosing it in a boot. At 40 mmHg, or after a Valsalva maneuver, both forearm and calf vessels constricted markedly and to the same degree. It appears that the reflex reduction in blood flow to the skeletal muscles of the limbs resulting from deactivation of the low-pressure intrathoracic mechanoreceptors is directed primarily to the arm.
Persistent Identifierhttp://hdl.handle.net/10722/170816
ISSN
2015 Impact Factor: 3.004
2015 SCImago Journal Rankings: 1.488
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorEssandoh, LKen_US
dc.contributor.authorHouston, DSen_US
dc.contributor.authorVanhoutte, PMen_US
dc.contributor.authorShepherd, JTen_US
dc.date.accessioned2012-10-30T06:10:59Z-
dc.date.available2012-10-30T06:10:59Z-
dc.date.issued1986en_US
dc.identifier.citationJournal Of Applied Physiology, 1986, v. 61 n. 3, p. 994-998en_US
dc.identifier.issn8750-7587en_US
dc.identifier.urihttp://hdl.handle.net/10722/170816-
dc.description.abstractModest degrees of lower body negative pressure (<20 mmHg) cause a reflex constriction of forearm resistance vessels attributable to a decrease in activity of cardiopulmonary mechanoreceptors. In the present study, we sought to determine whether the calf vessels respond similarly. Left forearm and right calf blood flows were measured simultaneously by strain-gauge plethysmography in 10 healthy volunteers. Forearm flows decreased significantly from control during negative pressures of 10, 15, or 20 mmHg, whereas calf flows did not increase significantly until 20 mmHg; at 10, 15, and 20 mmHg, decreases in forearm flow were significantly greater than those of the calf. Similar results were obtained in a second series of experiments in which venous pooling in the right leg during lower body negative pressure was prevented by enclosing it in a boot. At 40 mmHg, or after a Valsalva maneuver, both forearm and calf vessels constricted markedly and to the same degree. It appears that the reflex reduction in blood flow to the skeletal muscles of the limbs resulting from deactivation of the low-pressure intrathoracic mechanoreceptors is directed primarily to the arm.en_US
dc.languageengen_US
dc.relation.ispartofJournal of Applied Physiologyen_US
dc.subject.meshAdulten_US
dc.subject.meshDecompressionen_US
dc.subject.meshForearm - Blood Supplyen_US
dc.subject.meshHemodynamicsen_US
dc.subject.meshHumansen_US
dc.subject.meshLeg - Blood Supplyen_US
dc.subject.meshLower Body Negative Pressureen_US
dc.subject.meshMaleen_US
dc.subject.meshPressoreceptors - Physiologyen_US
dc.subject.meshRegional Blood Flowen_US
dc.subject.meshVasoconstrictionen_US
dc.titleDifferential effects of lower body negative pressure on forearm and calf blood flowen_US
dc.typeArticleen_US
dc.identifier.emailVanhoutte, PM:vanhoutt@hku.hken_US
dc.identifier.authorityVanhoutte, PM=rp00238en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.pmid3759785-
dc.identifier.scopuseid_2-s2.0-0022522899en_US
dc.identifier.volume61en_US
dc.identifier.issue3en_US
dc.identifier.spage994en_US
dc.identifier.epage998en_US
dc.identifier.isiWOS:A1986E026200027-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridEssandoh, LK=6602585144en_US
dc.identifier.scopusauthoridHouston, DS=35966326400en_US
dc.identifier.scopusauthoridVanhoutte, PM=7202304247en_US
dc.identifier.scopusauthoridShepherd, JT=7401742522en_US

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