MOINA Deep Muscles of the Back

Question 1

erector spinae

Answer 1

origin: illiac crest, sacrum, transverse and spinous processes of vertebrae, and supraspinal ligament
insertion: angles of the ribs, transverse and spinous processes of vertebrae, and posterior aspect of the skull

nerve: segmentally innervated by dorsal primary rami of spinal nerves C1

extends and laterally bends the head, neck, and trunk

Question 2

iliocostalis

Answer 2

origin: iliac crest and sacrum
insertion: angles of the ribs

nerve: dorsal primary rami of spinal nerves C4-S5

extends and laterally bends the neck and trunk

Question 3

interspinales

Answer 3

origin: upper border of spinous process
insertion: lower border of spinous process above

nerve: dorsal primary rami of spinal nerves C1-L5

extends neck and trunk

Question 4

intertransversarii

Answer 4

origin: upper border of transverse process
insertion: lower border of transverse process above

nerve: dorsal primari rami of spinal nerves C1-L5

laterally bends the neck and trunk

Question 5

longissimus

Answer 5

origin: transverse process at inferior vertebral levels
insertion: tranverse process at superior vertebral levels and mastoid process

nerve: dorsal primary rami of spinal nerves C1-S1

extends and laterally bends the head, neck, and trunk

Question 6

multifidus

Answer 6

origin: sacrum and transverse processes of C3-L5
insertion: spinous process 2-4 vertebral levels superior to origin

nerve: dorsal posterior rami of spinal nerves C1-L5

extends and laterally bends neck and trunk; rotates to opposite

Question 7

obliquus capitis inferior

Answer 7

origin: spinous process of axis
insertion: transverse process of atlas

nerve: suboccipital nerve (DPR of C1)

rotates head to same side

Question 8

obliquus capitis superior

Answer 8

origin: transverse process of atlas
insertion: occipital bone above inferior nuchal line

nerve: suboccipital nerve (DPR of C1)

extends head and rotates head to same side

Question 9

rectus capitis posterior major

Answer 9

origin: spinous process of axis
insertion: inferior nuchal line

nerve: suboccipital nerve (DPR of C1)

extends head and rotates head to same side

Question 10

rectus capitis posterior minor

Answer 10

origin: posterior tubercle of atlas
insertion: inferior nuchal line medially

nerve: suboccipital nerve (DPR of C1)

extends head