Muscles of Anterior Cervical Region (Extrinsic Muslces of Larynx).

Question 1

What are the suprahyoid muscles?

Answer 1

1. Mylohyoid
2. Geniohyoid
3. Stylohyoid
4. Diagastric

Question 2

What are the infrahyoid muscles?

Answer 2

1. Sternohyoid
2. Omohyoid
3. Sternothyroid
4. Thyrohyoid

Question 3

Mylohyoid Innervation

Answer 3

Nerve to mylohoid

Question 4

Geniohyoid Innervation

Answer 4

Hypoglossal

Question 5

Stylohyoid Innervation

Answer 5

Facial

Question 6

Diagastric Innervation

Answer 6

Anterior belly: nerve to mylohyoid

Posterior belly: Facial

Question 7

Sternohyoid Innervation

Answer 7

C1-C3 via ansa

Question 8

Omohyoid Innervation

Answer 8

C1-C3 via ansa

Question 9

Sternothyroid Innervation

Answer 9

C2-C3 via ansa

Question 10

Thyrohyoid Innervation

Answer 10

C1 via hypoglossal

Question 11

Mylohyoid Action

Answer 11

Elevates hypoid, floor of mouth, and tongue during swallowing and speaking.

Question 12

Geniohyoid Action

Answer 12

Pulls hyoid anterosuperiorly; shortens floor of mouth; widens pharynx.

Question 13

Stylohyoid Action

Answer 13

Elevates and retracts hyoid, elongating floor of mouth

Question 14

Diagastric Action

Answer 14

Works with infrahyoid muscles to depress mandible against resistance, elevates and steadies hyoid during swallowing and speaking.

Question 15

Sternohyoid Action

Answer 15

Depresses hyoid after elevation during swallowing

Question 16

Omohyoid Action

Answer 16

Depresses, retracts, and steadies hyoid.

Question 17

Sternothyroid Action

Answer 17

Depresses hyoid and larynx.

Question 18

Thyrohyroid Action

Answer 18

Depresses hyoid and elevates larynx.