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Author Question: Why is the inferior region of the shoulder joint most vulnerable to ... (Read 37 times)

piesebel

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on: Feb 28, 2019
Why is the inferior region of the shoulder joint most vulnerable to dislocation?

Question 2

When the triceps brachii muscle contracts, what movements does it produce?


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kaillie

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Reply #1 on: Feb 28, 2019
Answer to Question 1

The anterior, superior, and posterior surfaces of the shoulder joint are reinforced by ligaments, muscles, and tendons, but the inferior capsule is poorly reinforced. As a result, a dislocation caused by an impact or a violent muscle contraction is most likely to occur at this site. Such a dislocation can tear the inferior capsular wall and the glenoid labrum.

Answer to Question 2

The triceps brachii attaches to the olecranon process. Contraction of the triceps brachii muscle causes the ulna to rotate around the distal humerus, causing extension of the forearm.


piesebel

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Reply 2 on: Feb 28, 2019
Great answer, keep it coming :)

mcarey591

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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