Anterolateral Neck Muscles

Question 1

Anterior Digastric (attachments)

Answer 1

digastric fossa of mandible to intermediate tendon (great cornu of hyoid)

Question 2

Anterior Digastric (action)

Answer 2

depresses mandible or elevates hyoid

Question 3

Anterior Digastric (innervation)

Answer 3

mylohyoid branch of inferior alveolar n. (from CN V3)

Question 4

Posterior Digastric (attachment)

Answer 4

temporalmastoid notch to intermediate tendon (great cornu of hyoid)

Question 5

Posterior Digastric (action)

Answer 5

depresses mandible or elevates hyoid

Question 6

Posterior Digastric (innervation)

Answer 6

facial n.

Question 7

Geniohyoid (attachments)

Answer 7

inferior genial tubercle of mandible to anterior aspect of body of hyoid (median ridge of mandible to body of hyoid)

Question 8

Geniohyoid (action)

Answer 8

elevation of tongue & hyoid or depresses mandible

Question 9

Geniohyoid (innervation)

Answer 9

ventral ramus of C1 via CN XII

Question 10

Longus Capitis (attachments)

Answer 10

anterior tubercles of transverse processes of cervical vertebrae to basilar occipital bone

Question 11

Longus Capitis (action)

Answer 11

flexion of head & neck (bilateral), ipsilateral rotation (unilateral)

Question 12

Longus Capitis (innervation)

Answer 12

ventral rami of cervical spinal n.

Question 13

Longus Colli (attachments)

Answer 13

cervical vertebral bodies to cervical vertebral bodies & transverse processes

Question 14

Longus Colli (action)

Answer 14

flexion, lateral flexion of neck & ipsilateral rotation

Question 15

Longus Colli (innervation)

Answer 15

ventral rami of cervical spinal n. (C2-7)

Question 16

Mylohyoid (attachments)

Answer 16

mylohyoid line of mandible to midline raphe & anterior aspect of body of hyoid

Question 17

Mylohyoid (action)

Answer 17

elevation of oral cavity floor

Question 18

Mylohyoid (innervation)

Answer 18

mylohyoid branch of inferior alveolar n. (from CN V3)

Question 19

Omohyoid (attachments)

Answer 19

superior border of scapula medial to to scapular notch to lateral aspect of hyoid passing through an intermediate tendon sling loosely associated w/ clavicle & 1st rib

Question 20

Omohyoid (action)

Answer 20

depression of hyoid

Question 21

Omohyoid (innervation)

Answer 21

ansa cervicalis (C1-3)

Question 22

Anterior Scalene (attachments)

Answer 22

anterior tubercles of middle cervical vertebrae to scalene tubercle of 1st rib

Question 23

Anterior Scalene (action)

Answer 23

elevates 1st rib (during forced inspiration), flexion, lateral flexion & contralateral rotation of neck

Question 24

Anterior Scalene (innervation)

Answer 24

lower ventral rami of cervical spinal n.

Question 25

Middle Scalene (attachments)

Answer 25

transverse processes of cervical vertebrae to 1st rib

Question 26

Middle Scalene (action)

Answer 26

elevates 1st rib (during forced inspiration), flexion, lateral flexion & contralateral rotation of neck

Question 27

Middle Scalene (innervation)

Answer 27

lower ventral rami of cervical spinal n.

Question 28

Posterior Scalene (attachments)

Answer 28

lower cervical transverse processes to 2nd rib

Question 29

Posterior Scalene (action)

Answer 29

elevates rib (during forced inspiration), lateral flexion & contralateral rotation of neck

Question 30

Posterior Scalene (innervation)

Answer 30

ventral rami of cervical spinal n. (C6-8)

Question 31

Sternocleidomastoid (attachments)

Answer 31

lateral aspect of mastoid process & superior nuchal line to manubrium & medial 1/3rd of clavicle

Question 32

Sternocleidomastoid (action)

Answer 32

flexion, ipsilateral lateral flexion & extension of head & neck and contralateral rotation of head

Question 33

Sternocleidomastoid (innervation)

Answer 33

accessory n., C1 & 2

Question 34

Sternohyoid (attachments)

Answer 34

posterior side of proximal clavicle & adjacent manubrium to inferior border of body of hyoid

Question 35

Sternohyoid (action)

Answer 35

depresses hyoid

Question 36

Sternohyoid (innervation)

Answer 36

ansa cervicalis (C1-3)

Question 37

Sternothyroid (attachments)

Answer 37

posterior aspect of manubrium & costal cartilage of 1st rib to thyroid lamina

Question 38

Sternothyroid (action)

Answer 38

depression of elevated larynx

Question 39

Sternothyroid (innervation)

Answer 39

ansa cervicalis (C1-3)

Question 40

Stylohyoid (attachments)

Answer 40

styloid process of temporal bone to greater cornu of hyoid bone

Question 41

Stylohyoid (action)

Answer 41

elevates & retracts hyoid

Question 42

Stylohyoid (innervation)

Answer 42

facial n.

Question 43

Thyrohyoid (attachments)

Answer 43

thyroid lamina to greater horn of hyoid bone

Question 44

Thyrohyoid (action)

Answer 44

depression of hyoid or elevation of thyroid cartilage

Question 45

Thyrohyoid (innervation)

Answer 45

ventral ramus of C1 via XII