WEEK 2 - VC MUSCLES (ACTIONS & INNERVATION)

Question 1

Iliocostalis (Actions & Innervation)

Answer 1

Bilateral: Extension.
Unilateral: Extension and lateral flexion.
Innervation: Dorsal rami of spinal nerves.

Question 2

Longissimus (Actions & Innervation)

Answer 2

Bilateral: Extension
Unilateral: Extension and lateral flexion.
Innervation: Dorsal rami of spinal nerves.

Question 3

Multifidus Lumborum (Actions & Innervation)

Answer 3

Bilateral: Extension
Unilateral: Contralateral rotation of lumbar IVJ’s
Innervation: Dorsal rami of spinal nerves

Question 4

Semispinalis Capitis (Actions & Innervation)

Answer 4

Bilateral: Extension.
Unilateral: Contralateral rotation of cervical IVJ’s.
Innervation: Dorsal rami of spinal nerves.

Question 5

Psoas Major (Actions & Innervation)

Answer 5

Bilateral: Flexion of IVJ’s and hip joint.
Unilateral: lateral flexion of lumbar spine.
Innervation: Ventral rami of lumbar spinal nerves.

Question 6

Rectus Abdominis (Actions & Innervation)

Answer 6

Bilateral: Trunk flexion
Unilateral: n/a
Innervation: Ventral rami of spinal nerves.

Question 7

External Oblique (Actions & Innervation)

Answer 7

Bilateral: Trunk Flexion & Intra-abdominal pressure.
Unilateral: Lateral flexion and contralateral rotation of trunk
Innervation: Ventral rami of lower thoracic spinal nerves.

Question 8

Internal Oblique (Actions & Innervation)

Answer 8

Bilateral: Trunk flexion & intra-abdominal pressure.
Unilateral: Lateral flexion and ipsilateral rotation of trunk
Innervation: Ventral rami of lower thoracic spinal nerves

Question 9

Transverse Abdominis (Actions & Innervation)

Answer 9

Bilateral: Increase intra-abdominal pressure.
Unilateral: n/a
Innervation: Ventral rami of spinal nerves.

Question 10

Sternocleidomastoid (Actions & Innervation)

Answer 10

Bilateral: Flexes lower cervical IVJ’s.
Extends atlanto-occipital joint.
Unilateral: Lateral flexion and contralateral rotation of cervical IVJ’s.
Innervation: Spinal accessory nerve.

Question 11

Splenius Capitis (Actions & Innervation)

Answer 11

Bilateral: Extends head & cervical IVJ’s
Unilateral: Ipsilateral rotation of head and extension of neck.
Innervation: Dorsal rami of cervical thoracic.

Question 12

Longus Capitis (Actions & Innervation)

Answer 12

Bilateral: Flex lower cervical IVJ’s.
Unilateral: n/a
Innervation: Ventral rami of cervical IVJ’s.

Question 13

Scalenes Group (Actions & Innervation)

Answer 13

Bilateral: Stabilise cervical spine.
Elevate ribs during respiration.
Unilateral: Laterally flex cervical IVJ’s.
Innervation: Ventral rami of cervical IVJ’s.