The shoulder joint is a ball and socket synovial joint formed by the articulation of the glenoid cavity of the scapula and the head of the humerus. It is called the glenohumeral joint. Stability is maintained by the coracoacromial arch, musculotendinous cuff, glenoid labrum, and muscles. The shoulder joint has capsular ligaments, coracohumeral ligament, transverse humeral ligament, and glenoidal labrum. It contains three bursae: subacromial, subscapularis, and infraspinatus bursae. Blood supply comes from the anterior and posterior circumflex hum

1. SLIDES SHARE OF THE SHOULDER JOINT OF ANATOMY
BY . DR RAJ KUMAR
UTTAR PRADESH UNIVERSITY OF MEDICAL SCIENCES
SAIFAI ETAWAH.
SUBJECT. -
ANATOMY.
TOPIC -
SHOULDER JOINT.

2. TYPE _
The shoulder joint ball and socket vareity of synovial joint.
ARTICULAR SURFACE -
It is the formed by articulation of the Glinoid cavity of scapula and the head of
humerus.
So it is called glinohumeral articulation.
It is a weak joint because Glinoid cavity is small and shallow to hold the head of the
humerus.
STABILITY MAINTAIN BY _
● Coracoacromial arch.
● Musculotendinous cuff.
● Glenoid labrum.
● At the same muscle and atmospheric pressure.

4. LIGAMENTS OF SHOULDER JOINT _
Capsular ligaments
a. Inferiorlly _. Surgical neck.
b. Supperially _. Head of biceps brachii
2. Coracohumeral ligament.
3 . Transverse humeral ligament.
4. Glenoidal labrum.
.

5. BURSA OF THE SHOULDER JOINT -
1. Subacromial Bursa .
2. Subscpularis Bursa.
3. Infraspinatus Bursa.
RELATIONS OF THE SHOULDER JOINT _
supperially
_
_. Coracoacromial arch, subacromial Bursa, supraspinatus and deltoid.
INFERIORLLY _ Long head of triceps brachii, axillary nerve, posterior cercumflex humeral artery.
ANTERIOR _ subscpularis, coracobrachialis, short head of biceps brachii and deltoid.
POSTERIOR _. Infraspinatus, teresminor and deltoid.

6. BLOOD SUPPLY IN THE SHOULDER JOINT.
1. Anterior cercumflex humeral artery.
2. Posterior cercumflex humeral artery.
3. Suprascapular artery.
4. Subscpular artery.
NERVE SUPPLY .
1. Axillary nerve.
2. Musculocutenious nerve.
3. Suprascapular nerve.

8. ACTION _
FLEXION _. Clavicular head of pectoralis major and anterialy to deltoid.
EXTENSION _. Posterior deltoid and lattismusdorsii .
ADDUCTION _. pectoralis major and lattismusdorsii, long head of triceps brachii, short
head of biceps brachii.
ABDUCTION _. both supraspinatus and deltoid muscle, ( 0 to 90’ ) , serratus anterior 90 ‘
to 180’ upper and lower fibre of trapezius 90 to 180’.
MEDIAL ROTATION _
1. Pectoralis major.
2. Lattismusdorsii.
3. Anterior fibre of deltoid.
4. Teres mojar.
LATERAL ROTATION_
1. Posterior fibre of deltoid.
2. Infraspinatus.
3. Teres minor

10. CLINICAL ANATOMY _
Shoulder tip pain.
Frozen shoulder.