Neural circulatory control during exercise: Early insights

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Abstract

New Findings: • What is the topic of this lecture? Sir William Paton, a distinguished physician scientist, was interested in the origins of concepts in physiology. This lecture explores the early insights on the neural control of the circulation during exercise. • What advances does it highlight? This lecture presents some of the outstanding seminal investigations on the central and peripheral control mechanisms that regulate the autonomic neural activity to the heart and blood vessels during exercise. During exercise, the cardiovascular response is rapidly and appropriately matched to the intensity of the physical activity. The autonomic nervous system plays an important role in achieving this closely matched circulatory response by an increase in the sympathetic nerve activity to the heart, blood vessels and adrenal medulla and a decrease in the parasympathetic nerve activity to the heart. Early insights into the mechanisms that controlled these cardiovascular changes during exercise were reported in the 19th century. At that time, two mechanisms were hypothesized to be responsible for these changes. In one mechanism, a signal arising in a central area of the brain causes a parallel activation of skeletal muscle contraction and of autonomic nervous system changes (now termed 'central command'). In the other mechanism, a signal arising in the contracting skeletal muscle causes a reflex activation of the autonomic nervous system changes (now termed 'exercise pressor reflex'). Some important investigators involved in early studies include Johan Johansson, August Krogh, Johannes Lindhard and Horace Smirk. Also, Florence Buchanan and Louis Fridericia should be recognized for their contributions. In more recent years, the important involvement of a third mechanism, the arterial baroreflex, has been elucidated. Since those early insights, experiments in both animals and humans have added important findings that strongly support these early hypotheses.

Original languageEnglish (US)
Pages (from-to)867-878
Number of pages12
JournalExperimental Physiology
Volume98
Issue number4
DOIs
StatePublished - Apr 2013

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Exercise
Autonomic Nervous System
Blood Vessels
Reflex
Skeletal Muscle
Adrenal Medulla
Baroreflex
Muscle Contraction
Research Personnel
Physicians
Brain

ASJC Scopus subject areas

  • Physiology

Cite this

Neural circulatory control during exercise : Early insights. / Mitchell, Jere H.

In: Experimental Physiology, Vol. 98, No. 4, 04.2013, p. 867-878.

Research output: Contribution to journalArticle

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