The shoulder joint is formed by the rounded head of the humerus and the shallow glenoid cavity of the scapula. The joint is surrounded by a thin, lax capsule that allows a wide range of movement and is attached medially to the glenoid cavity and laterally to the humerus. Key muscles that act on the shoulder include the deltoid, pectoralis major, latissimus dorsi, teres major, and coracobrachialis. The shoulder allows for movements like flexion, extension, abduction, adduction, and both medial and lateral rotation.

1. By-
Mr. ASHOK BISHNOI
Lecturer,JINR

2. 2
 The rounded
head of the
humerus and
 The shallow,
pear-shaped
glenoid cavity
of the scapula
and make
shoulder joint
Glenoid
cavity

3. 3

4.  Scapula, clavicle, & humerus serve as attachments
for shoulder joint muscles
 The articular surfaces are covered by hyaline
cartilage.
 The fibrous capsule surrounds the joint and is attached:
Medially to the margin of the glenoid cavity outside the
labrum;
Laterally to the anatomic neck of the humerus.
 The capsule is thin and lax, allowing a wide range of
movement.

5. Nerve supply by:-
 Articular branches
of medial & lateral as
well as the
axillary nerve

6. Blood supply:-
 By branch of subclavian artery

7. Muscles of shoulder joint:-
1. Coracobrachialis muscle
2. Deltoid muscles
3. Pactoralish major
4. Latissimus dorsi
5. Teres major

8. Movements:-
1. Flexion
2. Extension
3. Abduction
4. Adduction
5. Circumduction
6. Medial rotation
7. Lateral rotation