Muscles of the Spine (Part 2)

Question 1

Splenius Capitis and Splenius Cervicis

Answer 1

-Together = Extension of head/neck
-Singly = Abduct/rotate head toward same side

Question 2

Semispinalis
(thoracis, cervicis, capitis)

Answer 2

Extends vertebral column and the head (capitis), rotates them to opposite side

Question 3

Spinalis
(thoracis, cervicis)

Answer 3

Extends the vertebral column

Question 4

Longissimus
(thoracis, cervicis, capitis)

Answer 4

Extends the vertebral column and head; rotates the head toward the same side

Question 5

Iliocostalis
(lumborum, thoracis, cervicis)

Answer 5

Extends the vertebral column and bends it to one side

Question 6

Multifidus

Answer 6

Extends the vertebral column; rotates it toward the opposite side

Question 7

Rotatores

Answer 7

Extends the vertebral column; rotates it toward the opposite side

Question 8

Interspinales

Answer 8

Extends the vertebral column

Question 9

Intertransversarii

Answer 9

Assists in lateral flexion of the spine; stabilizes the spine

Question 10

Quadratus Lumborum

Answer 10

Fixes the 12th rib during inspiration, trunk extension, lateral flexion of trunk (ipsilateral)