This presentation covered all scapular region muscles Deltoid Supraspinatus Infraspinatus Subscapularis Teres minor Teres major

1. Muscles of Scapular
region
Presented by- ND
Goswami

2. Deltoid
 Origin :
 The anterior border and
adjoining surface of the
lateral one third of the
clavicle.
 The lateral border of the
acromion where four septa of
origin are attached .
 Lower lip of the crest of the
spine of the scapula.

3. DELTOID

4. Deltoid

5. Deltoid

6. Deltoid
Insertion:
 The deltoid tuberosity
of the humerus where
three septa of insertion
are attached.
 Nerve supply: Axillary
nerve (C5,C6).

7. Deltoid
 Features:
 The acromial part of the deltoid
is an example of Multipinnate
muscle.
 Many fibers arise from four
septa of origin that are attached
above the acromion.
 The fibers converge on to three
septa of insertion which are
attached to the deltoid
tuberosity.

8. DELTOID
 Actions:
 the Multipinnate acromial fibers
are powerful abductors of the
arm at the shoulder joint from
beginning to 90°.
 The anterior fibers are flexors
and medial rotators of the arm.
The posterior fibers are
externsors and lateral rotators of
the arm.

9. Supraspinatus
 Origin
 medial two – third of the
supraspinous fossa of the
scapula.
 Insertion
 upper impression on the
greater tubercle of the
humerus.

10. Supraspinatus
 Nerve supply
 suprascapular nerve(C5,C6)
 Actions
 along with other short scapular
muscles,it steadies the head of
humerus during movements of
the arm
 abductors of shoulder joint from
0-15°

12. Infraspinatus
 Origin
 medial two – third of the
infraspinous fossa of the
scapula
 Insertion
 middle impression on the
greater tubercle of the
humerus

13. Infraspinatus
 Nerve supply
suprascapular nerve
(C5,C6)
 Action
 lateral rotators of
arm

14. Teres minor
 Origin
 upper two- third of the
dorsal surface of the
lateral border of the
scapula as 2 slips
 Insertion
 lowest impression on the
greater tubercle of the
humerus

15. Teresminor
 Nerve supply
 axillary nerve
 Actions
 lateral rotators of
the arm.

16. Subscapularis
(Multipinnate)
 Origin
 medial two – third of
the subscapular fossa
 Insertion
 lesser tubercle of the
humerus

17. Subscapularis

18. Subscapularis

19. Subscapularis
 Nerve supply
 upper and lower
subscapular nerve
(C5,C6)
 Action
 medial rotators and
adductor of arm

20. Teres major
 Origin
 lower one – third of the
dorsal surface of lateral
borders and interior angle of
the scapula
 Insertion
 medial lip of the bicipital
groove of the humerus

21. Teres major
 Nerve supply
 lower subscapular
nerve (C5,C6)
 Action
 medial rotators
and adductor of
arm