NDLI: Heart rate at the onset of muscle contraction and during passive muscle stretch in humans: a role for mechanoreceptors

Content Provider	PubMed Central
Author	Coote, J. H. Gladwell, V. F.
Copyright Year	2002
Abstract	Previous evidence suggests that the heart rate (HR) increase observed with isometric exercise is dependent on different afferent mechanisms to those eliciting the increase in blood pressure (BP). Central command and muscle metaboreceptors have been shown to contribute to this differential effect. However, in experimental animals passive stretch of the hindlimb increases HR suggesting that small fibre mechanoreceptors could also have a role. This has not been previously shown in humans and was investigated in this study. Healthy human volunteers were instrumented to record BP, ECG, respiration, EMG of rectus femoris and gastrocnemius and contraction force of triceps surae. Voluntary isometric contraction of triceps surae elicited a significant HR change in the first three respiratory cycles at 40 % of maximum voluntary contraction whereas BP did not change significantly until after 30 s. This suggests that different mechanisms are involved in the initiation of the cardiovascular changes. Sustained passive stretch of triceps surae for 1 min, by dorsiflexion of the foot, caused a significant (P < 0.05) increase in HR (5 ± 2.6 beats min−1) with no significant change in BP. A time domain measure of cardiac vagal activity was reduced significantly during passive stretch from 69.7 ± 12.9 to 49.6 ± 8.9 ms. Rapid rhythmic passive stretch (0.5 Hz for 1 min) was without significant effect suggesting that large muscle proprioreceptors are not involved. We conclude that in man small fibre muscle mechanoreceptors responding to stretch, inhibit cardiac vagal activity and thus increase HR. These afferents could contribute to the initial cardiac acceleration in response to muscle contraction.
Related Links	http://dx.doi.org/10.1113/jphysiol.2001.013486
Starting Page	1095
File Format	PDF
ISSN	14697793
e-ISSN	14697793
Journal	The Journal of Physiology
Issue Number	Pt 3
Volume Number	540
Language	English
Publisher	Blackwell Science Inc
Publisher Date	2002-05-01
Access Restriction	Open
Rights Holder	Blackwell Science Inc
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Physiology Sports Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Stretch receptor discharges during muscle contraction

Muscle sympathetic nerve activity responses to dynamic passive muscle stretch in humans

Aspirin augments carotid-cardiac baroreflex sensitivity during muscle mechanoreflex and metaboreflex activation in humans

Dynamic response of human muscle spindle afferents to stretch during voluntary contraction

Strain of passive elements during force enhancement by stretch in frog muscle fibres.

The early discharge of mammalian muscle spindles at onset of contraction

Water drinking-related muscle contraction induces the pressor response via mechanoreceptors in conscious rats.

Sympathetic Nerves Inhibit Conducted Vasodilatation Along Feed Arteries during Passive Stretch of Hamster Skeletal Muscle

Effect of muscle mass on muscle mechanoreflex-mediated heart rate increase at the onset of dynamic exercise

Heart rate at the onset of muscle contraction and during passive muscle stretch in humans: a role for mechanoreceptors

Similar Documents

Stretch receptor discharges during muscle contraction

Muscle sympathetic nerve activity responses to dynamic passive muscle stretch in humans

Aspirin augments carotid-cardiac baroreflex sensitivity during muscle mechanoreflex and metaboreflex activation in humans

Dynamic response of human muscle spindle afferents to stretch during voluntary contraction

Strain of passive elements during force enhancement by stretch in frog muscle fibres.

The early discharge of mammalian muscle spindles at onset of contraction

Water drinking-related muscle contraction induces the pressor response via mechanoreceptors in conscious rats.

Sympathetic Nerves Inhibit Conducted Vasodilatation Along Feed Arteries during Passive Stretch of Hamster Skeletal Muscle

Effect of muscle mass on muscle mechanoreflex-mediated heart rate increase at the onset of dynamic exercise

Heart rate at the onset of muscle contraction and during passive muscle stretch in humans: a role for mechanoreceptors