Deep Back Muscles

Question 1

Spenius capitis origin

Answer 1

Nuchal ligament;

Spinous process if C7-T3 or T4 vertebrae

Question 2

Splenius capitis insertion

Answer 2

Mastoid process of temporal bone;

Lateral thirs of superior nuchal line (occipital bone)

Question 3

Splenius capitis innervation

Answer 3

Dorsal rami

Question 4

Splenius capitis action

Answer 4

Ipsilaterally laterally flexes and rotates head/neck;

Bilaterally extends head/neck

Question 5

Splenius cervicis origin

Answer 5

Nuchal ligament

Spinous process of C7-T6 vertebrae

Question 6

Splenius cervicis insertion

Answer 6

Tubercles of transverse processes of C1-C3 vertebrae

Question 7

Splenius cervicis innervation

Answer 7

Dorsal rami

Question 8

Splenius cervicis action

Answer 8

Ipsilaterally laterally flexes and rotates head/neck;

Bilaterally extends head/neck

Question 9

Iliocostalis origin

Answer 9

Arises by a broad tendon from posterior part of iliac crest;

Posterior surface occipital?

Question 10

Iliocostalis insertion

Answer 10

Lumborum/thoracis/cervicis

Runs superiorly to angkes of lower ribs and cervical vertebrae

Question 11

Iliocostalis action

Answer 11

Ipsilaterally laterally flexes trunk;

Bilaterally extends trunk