Muscular system By Jamal Ahmad

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

2. •Superficial
•Splineus capitis
• Ligamentum nuchae and C7-T3T4
• Mastoid process and occipital bone
• Rotate the head same side
• Posterior rami of C3C4

3. •Splineus cervicis
Spinous process of T3-T6
Transverse process of C1-C3/C4
Rotate the head same side
Posterior rami of lower cervical
nerve

5. •Intermediate
• All three muscles have a common t
endenious origin from lumbar and l
ower thoracic vertebrae sacrum po
sterior Iliac crest sacroiliac and sup
raspinatus ligament

6. •Iliocostalis
• Costal angle of ribs and transvers
e process of cervical vertebrae
• Uniletraly flex and Bilateraly ext
end the verteral column and exten
d head
• Posterior rami of cervical nerve

7. •Longissimus
•Lower ribs transverse proce
ss of C7-T12 and mastoid p
rocess
•Same
•Same

8. •Spinalis
• C2 T1-T8 occipital bone of skull

9. •Deep
•Semispinalis
• Transverse process of C4'T10
• Spinous process of C2-C4
• Extend and Contraletray rotate the ver
tebral column and head
• Posterior rami of cervical nerve

10. •Multifidus
• Sacrum posterior Iliac spine common
tendenious of erector spinal mamillar
y process of lumbar transverse proces
s of T1-T3 articular process of C4-C7
• Spinous process of vertebrae
• Stabilise the vertebral column
• Posterior rami of spinal nerves

11. •Rotators
• Transverse process of vertebrae
• Lamina and spine of vertebrae ju
st above
• Stabilise the vertebral column
• Posterior rami of spinal nerves

12. • MINOR DEEP INTRINSIC MUSCLES
• Interspinales
• Spans between spines of vertebrae and stabilise the
vertebral column
• Intertransverseri
• Spans between transverse process of vertebrae and
stabilise vertebral column
• Levator costarum
• Transverse process of c7-T11
• Ribs just below
• Elevate the rib