the shoulder joint Flashcards
how is the glenoid cavity deepened
fibro cartilaginous collar (the glenoid labrum)
the fibrous capsule has scapular attachments, what are they ?
margins of the glenoid foss, supraglenoid tubercle with the long head of the biceps
the fibrous capsule has humeral attachments, what are they?
surrounds neck of humerus and half a inch of the shaft
what does the synovial membrane line
the inner surface of the capsule
what is the purpose of the gleno-humeral ligament
strengthens the anterior surface of the capsule
what are the origin and insertion points of the gleno-humeral ligaments
They extend from the anterior glenoid margin to the lesser tubercle of the humerus.
what are the origin and insertion points of the transverse humeral ligaments
It stretches across the inter tubercular groove & allows passage of tendon of long head of biceps.
what are the origin and insertion points of the coraco - humeral ligament
Between the coracoid process and the greater tubercle of the humerus.
what are the origin and insertion points of the Coraco –acromial ligament
Between coracoid process and acromion.
– Prevents upward displacement of the head of humerus.
which muscles secure the shoulder joint by connecting the humerus to the scapula
The muscles are subscapularis in front, the supraspinatus above, and the infraspinatus and teres minor behind.
find axis of movement in lecture ppt
found in ppt
how does the shoulder get its blood supply
Anterior & posterior circumflex arteries (axillary A.). 2. Suprascapularartery(subclavianA.).
what nerves supply the shoulder
Suprascapular nerve (upper trunk). Axillary nerve (post. cord). Lateral pectoral nerve (lat. cord).
what is the most common shoulder dislocation
anterior dislocation of the shoulder joint
how does anterior dislocation most commonly occur?
A hard blow to the humerus when the gleno-
humeral joint is fully abducted tilts the head of the humerus inferiorly onto the inferior weak part of the joint capsule
