Neck I

Question 1

What is the trapezius and the sternocleidomastoid innervated by?

Answer 1

CN XI spinal accessory nerve.

This is a motor (efferent) n.

Question 2

What 3 of the 4 infrahyoid muscles are innervated by the Ansa Cervicalis n?

Answer 2

Omohyoid m, sternohyoid m, sternothyroid m.

Question 3

What is the 4th infrahyoid m. innervated by and what is that muscle?

Answer 3

the thyrohyoid m. is innervated by C1

Question 4

The platysma m. is innervated by:

Answer 4

cervical branch of the facial nerve (VII)

Question 5

What are the 4 cutaneous branches of the cervical plexus?

Answer 5

1. Lesser occipital n.
2. Great auricular n.
3. Transverse cervical n.
4. Supraclavicular n.