Back and Spine Muscles: Innervation

Question 1

Determine the innervation of the following muscles:

1. Iliocostalis
2. Erector spinae
3. Interspinales
4. Multifidus
5. Intertransversarii

A. dorsal primary rami of spinal nerves C4-S5
B. dorsal primary rami of spinal nerves C1-L5
C. dorsal primary rami of spinal nerves C1-S5

Answer 1

1. A
2. C
3. B
4. B
5. B

Question 2

TRUE OR FALSE: The Spinalis muscle is innervated by the dorsal primary rami of spinal nerves C1-L4

Answer 2

False.

It is innervated by the dorsal primary rami of spinal nerves C2-L3

Question 3

The rotatores muscle is innervated by the (1)____ primary rami of spinal nerves (2)_____.

Answer 3

1. dorsal
2. C1-L5

Question 4

The suboccipital nerve is also known as _____

Answer 4

DPR of C1

Question 5

The following muscles are innervated by the suboccipital nerve, EXCEPT:

A. Obliquus capitis inferior
B. Rectus capitis posterior major
C. Rectus capitis posterior minor
D. None of the above

Answer 5

D. None of the above

Question 6

The following muscles are innervated by the dorsal primary rami of spinal nerves C2-C6, EXCEPT:

A. Splenius cervicis
B. Serratus Posterior Superior
C. Splenius capitis
D. None of the above

Answer 6

B. Serratus Posterior Superior

Question 7

This muscle is innervated by the dorsal primary rami of spinal nerves C1-S1

Answer 7

Longissimus

Question 8

The obliquus capitis superior is innervated by the ____.

Answer 8

suboccipital nerve (DPR of C1)

Question 9

TRUE OR FALSE: The Serratus Posterior Inferior is innervated by the branches of the ventral primary rami of spinal nerves T9-T12

Answer 9

True.