Muscular System By Jamal Ahmad 50

1. Muscles of
Chest
Muscles of bac
k (S)

2. •TRAPEZE US
•LATISSIMUS DORSI
•LEVATOR SCAPULA
E
•RHOMBOIDS MAJOR

3. •Trapezeus
• Skull ligamentum nuchae spinous proces
s of C7-T12
• Clavicle acromian scapula spine
• Upper fiber elevate the scapula and rotate
in abduction midle fibers retract the scapu
la lower fiber pull the scapula inferiorly
• Accesary nerve and fibers of C3 and C2

4. • LATISSIMUS DORSI
• Spinous process of T6- T12 Iliac crest
Thoracolumbar fascia and inferior thr
ee ribs
• Fibers converge to tendon and inserts
on Intertubercular sulcus
• Extend Adducts and medialy rotate the
arm
• Thoracodorsal nerve

5. •Levator SCAPULAE
•Transverse process of C1-
C4
•Medial border of scapula
•Elevate the scapula
•Dorsal scapular nerve

6. • RHOMBOIDS MAJOR
•Spinous process of T2-T5
•Medial border ofScapula bet
ween spine and inferior angle
•Retracts and rotate the scapul
a
•Dorsal scapular nerve

7. • RHOMBOIDS MINOR
•Spinous process of C7-T1
•Medial border of scapula a
t level of spine
•Same
•Same

9. •Muscles of back (inter
mediate )
•SERRATUS POSTERIO
R SUPERIOR
•SERRATUS POSTERIO
R INFERIOR

10. • Serratus posterior superior
•Lower part of ligamentum nuc
hae spinous process of C7-T1
•Ribs 2-5
•Elevate the ribs 2-5
•Intercostal nerve

11. • Serratus posterior inferior
•Spinous process of T11-L3
•Ribs 9-12
•Depress the ribs 9-12
•Intercostal nerve