Axial Muscles (Action Only)

Question 1

Anterior Scalene, Middle Scalene, & Posterior Scalene perform which 3 internal torque actions?

Answer 1

Rib Elevation, Cervical Flexion, & Cervical Ipsilateral Flexion

Question 2

Longus Colli and Longus Capitis only perform what single action of internal torque?

Answer 2

Cervical Flexion

Question 3

Sternocleidomastoid (SCM) performs what 4 actions of internal torque?

Bonus What is the Innervation for the SCM?

Answer 3

Lower Cervical Flexion, Upper Cervical Extension, Cervical Ipsilateral Flexion, & Cervical Contralateral Rotation.

Bonus Answer: Innervation by Spinal Accessory (Cranial Nerve XI)

Question 4

Splenius Capitis & Splenius Cervicis have what 3 actions?

Answer 4

Cervical Extension
Cervical Ipsilateral Flexion
Cervical Ipsilateral Rotation

Question 5

Rectus Abdominis performs what single action?

Answer 5

Trunk Flexion

Question 6

External Oblique performs what 3 actions?

Answer 6

Trunk Flexion
Trunk Ipsilateral Flexion
Trunk Contralateral Rotation

Question 7

Internal Oblique performs what 3 actions?

Answer 7

Trunk Flexion
Trunk Ipsilateral Flexion
Trunk Ipsilateral Rotation

Question 8

Transverse Abdominus performs what unique action?

Answer 8

Increases Intra-Abdominal Pressure

Question 9

Psoas Major perform what action?

Answer 9

Trunk Flexion

Question 10

Quadratus Lumborum perform what 2 actions?

Answer 10

Trunk Extension
Trunk Ipsilateral Flexion

Question 11

Illiocostalis performs what 4 actions?

Answer 11

Trunk extension
Cervical Extension
Trunk Ipsilateral Flexion
Cervical Ipsilateral Flexion

Question 12

Spinalis performs what 2 actions?

Answer 12

Trunk Extension
Cervical Extension

Question 13

Semispinalis performs what 2 actions?

Answer 13

Cervical Extension
Cervical Contralateral Rotation

Question 14

Rotatores and Multifidis perform 4 actions, what are they?

Answer 14

Trunk Extension
Cervical Extension
Trunk Contralateral Roatation
Cervical Contralateral Rotation