Deep Layer Of Intrinsic Back Muscles (tranversospinales)

Question 0

Semispinalis insertion

Answer 0

Occipital bone and spinous processes of in upper thoracic and cervical regions spanning 4-6 regions

Question 1

Semispinalis origin

Answer 1

Transverse processes of C4-T10

Question 2

Semispinalis main actions

Answer 2

Extends head and thoracic and cervical regions of vertebral column and rotates them contralaterally

Question 3

Multifidus origin

Answer 3

Superior posterior iliac spine, posterior sacrum, aponeurosis of erector spinae, sacro-iliac ligaments, mammillary bodies of lumbar vertebrae, transverse processes of thoracic vertebrae and articular processes of C4- C7

Question 4

Multifidus insertion

Answer 4

Entire length of spinous processes 2-4 segments above origin

Question 5

Multifidus main actions

Answer 5

Unilateral contraction: rotates to contralateral side, stabilizes column locally during movement

Question 6

Rotatores origin

Answer 6

Transverse processes of vertebrae

Question 7

Rotatores insertion

Answer 7

Junction of lamina and transverse processes on one above (brevis) or 2 segments above (longus)

Question 8

Rotatores main action

Answer 8

May function as organ of propioception, possibly stabilize vertebrae and assist in rotating