Head and Neck Muscles: Innervation

Question 1

Determine the innervation of the following muscles:

1. Medial/Internal Pterygoid
2. Masseter
3. Orbicularis oculi
4. Procerus
5. Corrugator supercilii

A. Trigeminal Nerve (Mandibular branch)
B. Facial nerve (superior buccal branches)
C. Facial Nerve (zygomatic branch)

Answer 1

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

Question 2

What branch of the facial nerve supplies the frontalis muscle?

Answer 2

Temporal branch

Question 3

TRUE OR FALSE: The anterior auricular branch of the facial nerve supplies the Occipitalis.

Answer 3

False.

It is innervated by the posterior auricular branch.

Question 4

Enumerate the 4 muscles innervated by CN V-3.

Answer 4

1. Masseter
2. Medial/Internal Pterygoid
3. Lateral/ External Pterygoid
4. Temporalis

Question 5

The muscles of the head is mainly innervated by which nerve?

Answer 5

facial nerve

Question 6

Determine the innervation of the following muscles:

1. Platysma
2. Sternocleidomastoid
3. Digastric Posterior belly
4. Digastric Anterior belly
5. Stylohyoid

A. facial nerve cervical branch
B. nerve to mylohyoid
C. Spinal part of accessory nerve and C2 and 3
D. Facial nerve
E. None of the above

Answer 6

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

Question 7

TRUE OR FALSE: The superior alveolar nerve innervates the mylohyoid.

Answer 7

False.

The inferior alveolar nerve supplies this muscle.

Question 8

The following muscles are innervation by the Ansa Cervicalis, EXCEPT:

A. Geniohyoid
B. Sternohyoid
C. Sternothyroid
D. Omohyoid Inferior belly
E. Omohyoid Superior belly

Answer 8

A. Geniohyoid

Question 9

This nerve supplies the thyrohyoid and geniohyoid

Answer 9

First cervical nerve

Question 10

Determine the innervation of the following muscles:

1. Scalenus Anterior
2. Scalenus Medius
3. Scalenus Posterior

A. C4, 5, and 6
B. Anterior rami of cervical nerves
C. Both

Answer 10

1. A
2. B
3. B