2. Explain why the pain of a myocardial infarction may be referred to the upper limb.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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topic: Pathophysiology

2. Explain why the pain of a myocardial infarction may be referred to the upper
limb.
The cardiac plexus serves as a conduit not only for parasympathetic preganglionic
postganglionic and visceral sensory fibers but also for sympathetic postganglionic
fibers. Stimulation of the sympathetic increases the heart rate and the force of
contraction, and stimulation of the parasympathetic fibers decreases the heart rate
and reduces the force of contraction.
Transcribed Image Text:2. Explain why the pain of a myocardial infarction may be referred to the upper limb. The cardiac plexus serves as a conduit not only for parasympathetic preganglionic postganglionic and visceral sensory fibers but also for sympathetic postganglionic fibers. Stimulation of the sympathetic increases the heart rate and the force of contraction, and stimulation of the parasympathetic fibers decreases the heart rate and reduces the force of contraction.
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