Anterior Triangle of Neck

Question 1

Infrahyoid Muscles

Answer 1

Sternohyoid, Sternothyroid, Thyrohyoid, Omohyoid

Question 2

Sternohyoid

Answer 2

Depresses Hyoid bone

Supplied by ansa cervicalis

Question 3

Sternothyroid

Answer 3

Depresses larynx

Supplied by ansa cervicalis

Question 4

Thyrohyoid

Answer 4

Depresses hyoid or elevates larynx

Supplied by C1 via hypoglossal n

Question 5

Ansa Cervicalis

Answer 5

Nerve loop from ventral roots of C1-C3

gives branches to supply sternohyoid, sternothyroid, omohyoid

Question 6

Lower Root of Ansa Cervicalis

Answer 6

From C2 and C3

passes deep to internal jugular

Question 7

Upper Root of Ansa Cervicalis

Answer 7

From C1; runs along hypoglossal n (CN XII)

Question 8

Suprahyoid Muscles

Answer 8

Digastric, Stylohyoid, Mylohyoid, Geniohyoid

Question 9

Digastric

Answer 9

Depresses mandible and elevates hyoid

Question 10

Nerve supply of posterior belly of Digastric

Answer 10

facial nerve

Question 11

Nerve supply of anterior belly of Digastric

Answer 11

nerve to mylohyoid

Question 12

Stylohyoid

Answer 12

Elevates hyoid bone and draws it backwards

inn by facial n

Question 13

Mylohyoid

Answer 13

elevates floor of mouth during swallowing
elevates hyoid bone
depresses mandible
inn by n to mylohyoid

Question 14

Geniohyoid

Answer 14

elevates hyoid and draws it forward, depresses mandible

inn by C1 via hypoglossal n

Question 15

Anterior Vertebral Muscles

Answer 15

Longus capitits, Longus colli, Rectus capitis anterior, Rectus capitis lateralis

Question 16

Longus Capitis

Answer 16

flex head and neck

inn by C1-C3

Question 17

Longus Colli

Answer 17

Inferior oblique, superior oblique, vertical parts
flexes neck
inn from ventral rami of C2-C6

Question 18

Rectus Capitis Anterior

Answer 18

flexes head

inn by branches from loop b/t C1-C2

Question 19

Rectus Capitis Lateralis

Answer 19

Lateral flexion of head to side of contraction

inn by branches from loop b/t C1-C2