EBK HUMAN ANATOMY & PHYSIOLOGY
EBK HUMAN ANATOMY & PHYSIOLOGY
1st Edition
ISBN: 9780100659834
Author: AMERMAN
Publisher: YUZU
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Chapter 9, Problem 5CYU

The supraspinatus stabilizes the shoulder joint but also assists arm abduction. Based on this information alone (and without checking any tables), which bones serve as the origin and insertion for this muscle?

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* These muscles (and subscapularis) form the rotator cuff which is a critical stabilizing element for the glenohumeral joint (shoulder joint). Thus, one action for each of these muscles is to stabilize the shoulder joint. Examine the rotator cuff muscles in the cadaver and see if you can determine where the tendons incompletely surround the head of the humerus. What clinical significance does this have?
Most of the muscles attached to the scapula are fixators, but a few do contribute to arm movement. Compare and contrast two fixators of the scapula with two muscles attached to the scapula that contribute to arm movement?
Which large muscle inserts in the deltoid tuberosity? What is the structural category of the elbow joint? What kind of movement occur at this joint? What muscle of the arm inserts in the radial tuberosity? What does styloid mean? What other bone have we studied that has a styloid process? Why is metacarpal a good name for these bones? What bones do the proximal phalanges articulate with proximally? What bones do the proximal phalanges articulate with distally? Which phalanx is missing from the pollex?

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EBK HUMAN ANATOMY & PHYSIOLOGY

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