Muscles of anterior cervical regions (O, I, N, A)

Question 1

Insertion: Mylohyoid

Answer 1

Mylohyoid raphe and bone of hyoid

Question 2

Origin: Mylohyoid

Answer 2

Mylohyoid line of mandible

Question 3

Nerve innervation: mylohyoid

Answer 3

Nerve to mylohyoid, a branch of inferior alveolar nerve (from mandibular nerve, CN V3)

Question 4

Origin: Geniohyoid

Answer 4

mental spines of mandible

Question 5

Insertion: Geniohyoid

Answer 5

Body of hyoid bone

Question 6

Nerve innervation: Geniohyoid

Answer 6

C1 via hypoglossal nerve (CN XII)

Question 7

Action: mylohyoid

Answer 7

Elevates hyoid, floor of mouth, and tongue during swallowing and speaking

Question 8

Action: Geniohyoid

Answer 8

Elevates and protracts hyoid bone. Depresses mandible

Question 9

Origin: stylohyoid

Answer 9

styloid process of temporal bone

Question 10

Insertion: stylohyoid

Answer 10

Base of greater cornu of hyoid bone

Question 11

Nerve innervation: stylohyoid

Answer 11

Posterior auricular branch of facial nerve (VII)

Question 12

Action: stylohyoid

Answer 12

elevates and retracts hyoid, thus elongating floor of mouth

Question 13

Origin: digastric (anterior belly)

Answer 13

anterior belly: digastric fossa on posterior surface of symphysis menti

Question 14

Origin: digastric (posterior belly)

Answer 14

posterior belly: : mastoid process

Question 15

Insertion: digastric

Answer 15

Fibrous loop to lesser cornu of hyoid bone

Question 16

Nerve innervation: digastric

Answer 16

Anterior belly: mylohyoid nerve of V3 (CN V). Posterior belly: facial nerve (VII)

Question 17

Action: digastric

Answer 17

Aids in swallowing, elevates hyoid and floor of mouth. Depresses mandible

Question 18

Origin: sternohyoid

Answer 18

Superior lateral posterior aspect of manubrium

Question 19

Insertion: sternohyoid

Answer 19

Inferior border of body of hyoid bone

Question 20

Nerve innervation: sternohyoid

Answer 20

C1 - C3 by a branch of ansa cervicalis

Question 21

Action: sternohyoid

Answer 21

Depresses hyoid after elevation during swallowing

Question 22

Origin: Omohyoid

Answer 22

Suprascapular ligament and adjacent scapula

Question 23

Insertion: omohyoid

Answer 23

Inferior body of hyoid bone

Question 24

Nerve innervation: omohyoid

Answer 24

Ansa cervicalis Nerve (C1, 2, 3)

Question 25

Action: omohyoid

Answer 25

Depresses, retracts, and steadies hyoid

Question 26

Origin: sternothyroid

Answer 26

Medial posterior aspect of manubrium

Question 27

Insertion: sternothyroid

Answer 27

Oblique line of thyroid cartilage

Question 28

Nerve innervation: sternothyroid

Answer 28

C2 and C3 by a branch of ansa cervicalis

Question 29

Action: sternothyroid

Answer 29

depresses hyoid and larynx

Question 30

Origin: thyrohyoid

Answer 30

oblique line of thyroid cartilage

Question 31

Insertion: thyrohyoid

Answer 31

inferior border of body of HYOID BONE and greater horn of hyoid

Question 32

Nerve innervation: thyrohyoid

Answer 32

C1 via hypoglossal nerve (CNX II)

Question 33

Action: thyrohyoid

Answer 33

depresses hyoid an elevates larynx

Question 34

Origin: sternocleidomastoid

Answer 34

Manubrium and medial clavicle

Question 35

Insertion: sternocleidomastoid

Answer 35

Mastoid process and superior nuchal line

Question 36

Action: sternocleidomastoid

Answer 36

• Flexes and lat rotates cervical spine.
• Protracts head when acting together .
• Extends neck when neck already partially extended

Question 37

N. Innervation: sternocleidomastoid

Answer 37

Accessory nerve