Answered: You notice upon evaluation that Ms.…

You notice upon evaluation that Ms. Young has decreased strength in her right shoulder compared with her left shoulder, which has no muscle spasms. Explain this finding.

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter8: Muscle Physiology

Section: Chapter Questions

Problem 8RE

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Concept explainers

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.

Question

Your patient, Ms. Young, presents to physical therapy for evaluation and treatment of painful muscle spasms (sustained muscle contractions) in the muscles of her right shoulder. You notice upon evaluation that Ms. Young has decreased strength in her right shoulder compared with her left shoulder, which has no muscle spasms. Explain this finding. (Hint: Is a muscle in the spasm at its natural length?

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