Video 3.13

Rupture of the acromioclavicular and coracoclavicular ligaments. Weight of unsupported upper limb pulls scapula away from clavicle. When looking at the shoulder, this will present as a step between the clavicle and the deltoid.

what is the only bony connection of the upper limb to the thorax

One of the most commonly fractured bones. Usually between lateral 1/3 and medial 2/3 (weakest part). Action of muscles causes fragments to override. Presents as a bump in the middle.

which glenohumeral dislocation is the most common

90% of all dislocations. Humeral head anterior to glenoid. May injure axillary nerve.

3% of all dislocations. Humeral head posterior to glenoid and long head of triceps.

1% of all dislocations. Humeral head superior to glenoid. May injure biceps long head tendon, glenoid labrum.

very rare dislocation. Humeral head abducted and inferior to the glenoid

what causes rotator cuff injuries

which part of the rotator cuff in most commonly injured

what tendon can be impacted by a rotator cuff injury

what is the innervation of the supraspinatus muscle

Injury to the _____ _____ nerve results in dysfunction of serratus anterior muscle and inability to fully abduct arm

what other muscle assists the serratus anteior in superior rotation of the scapula