Why is the inferior region of the shoulder joint most vulnerable ...

[piesebel]

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?

[kaillie]

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]

Wow, this really help

[dantucker]

Thanks for the timely response, appreciate it