Spinal Lab - Muscles Actions

Question 1

Splenius Cervicis

Answer 1

Laterally flex and rotate neck; BILATERALLY extend neck

Question 2

Iliocostalis Lumborum

Answer 2

Extension, lateral flexion, rotation of L spine; lateral movement of pelvis

Question 3

Iliocostalis Thoracis

Answer 3

Extension, lateral flexion T spine

Question 4

Iliocostalis Cervicis

Answer 4

Extension, lateral flexion, rotation lower C spine

Question 5

Longissimus Thoracis

Answer 5

Lateral flexion T spine and ribs (L spine inadvertently); BILATERALLY act in extension of T and L spine, hold T and L spine erect (increases L lordosis); lateral movement of pelvis

Question 6

Longissimus Cervicis

Answer 6

Lateral flexion of neck; BILATERALLY extends neck

Question 7

Spinalis Thoracis

Answer 7

Extend T spine

Question 8

Spinalis Cervicis

Answer 8

Lateral flexion and rotation of C spine; BILATERALLY extend neck

Question 9

Spinalis Capitis

Answer 9

Lateral flexion and rotation of head; BILATERALLY extend head

Question 10

Semispinalis Thoracis

Answer 10

Extension, rotation, and lateral flexion of upper T and lower C spine; BILATERALLY extend T spine

Question 11

Semispinalis Cervicis

Answer 11

Extension, rotation, and lateral flexion of C spine; BILATERALLY extend neck

Question 12

Semispinalis Capitis

Answer 12

Turns face to side; BILATERALLY extends head (neck inadvertently)

Question 13

Rectus capitis posterior major

Answer 13

Turns face to side; BILATERALLY extends head

Question 14

Rectus capitis posterior minor

Answer 14

Extends head

Question 15

Obliquus capitis superior

Answer 15

Lateral flexion of head; BILATERALLY extends head

Question 16

Obliquus Capitis Inferior

Answer 16

Turns face to side

Question 17

Quadratus Lumborum

Answer 17

Steadies origin of diaphragm; when pelvis is fixed, it will laterally flex the L spine; BILATERALLY extends the L spine; stabilizes and depresses the 12th rib

Question 18

Serratus Posterior Superior

Answer 18

Elevate upper 5 ribs in inspiration

Question 19

Serratus posterior inferior

Answer 19

draws lower 4 ribs down and back; rotation to the contralateral side

Question 20

Longus Colli

Answer 20

Flexion and extension of neck; rotation to the contralateral side

Question 21

Longus Capitis

Answer 21

Flex the head

Question 22

Rectus Capitis Anterior

Answer 22

Flex the head

Question 23

Rectus Capitis Lateralis

Answer 23

Laterally flex the head to ipsilateral side

Question 24

Splenius Capitis

Answer 24

Laterally flex head and rotate face to side; BILATERALLY extend head