Hyoid bone, Strap muscles of the neck and the cervical plexus

Question 1

The hyoid bone is the only bone in the body which is not what?

Answer 1

Articulated with another bone

Question 2

Which muscles/ sets of muscles are attached to the hyoid bone?

Answer 2

Supra hyoid muscles
Infra hyoid muscles
Hyoglossus muscle (muscle of tongue)
Middle pharyngeal constrictor (Muscle of the pharynx)

Question 3

What are the names of the supra hyoid muscles?

Answer 3

Mylohyoid
Geniohyoid
Digastric
Stylohyoid

Question 4

What is the nerve supply of the mylohyoid?

Answer 4

Branch of the mandibular nerve

Question 5

What is the nerve supply of the geniohyoid?

Answer 5

Fibres from the first cervical nerve

Question 6

What is the nerve supply of the digastric muscle?

Answer 6

Digastric branch of the facial nerve
Trigeminal nerve (via mylohyoid)

Question 7

What actions do the supra hyoid muscles have on the hyoid bone?

Answer 7

Elevate hyoid during swallowing

Question 8

What actions do the supra hyoid muscles have on the mandible?

Answer 8

Depress the mandible

Question 9

What are the names of the infra hyoid muscles?

Answer 9

Sternohyoid
Thyrohyoid
Omohyoid
Sternothyroid

Question 10

What is the nerve supply to the omohyoid?

Answer 10

Branches of C1-C3

Question 11

What actions would the infra hyoid muscles have on the hyoid bone?

Answer 11

Depress hyoid

Question 12

What are the vertebral root values of the cervical plexus?

Answer 12

Ventral rami of C1-C4

Question 13

What is the ansa cervicalis?

Answer 13

Loop of nerves that are part of the cervical plexus