Anterolateral neck mm

Question 1

Anterior digastric

Answer 1

attachments- from the digastric fossa of the mandible to the intermediate tendon (greater cornu of hyoid) (inferior border of mandible near symphysis to intermediate tendon & body and cornu of hyoid)

function- depression of the mandible or elevation of the hyoid

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

Question 2

Posterior digastric

Answer 2

attachments- from the temporal mastoid notch to the intermediate tendon (greater cornu of hyoid) (mastoid process to intermediate tendon & body and cornu of hyoid)

function- depression of the mandible or elevation of the hyoid

innervation- facial n.

Question 3

Geniohyoid

Answer 3

attachments- from the inferior genial tubercle of the mandible to the anterior aspect of the body of the hyoid (median ridge of mandible to body of hyoid)

function- elevation of tongue and hyoid or depresses mandible

innervation- ventral ramus of C1 via CN XII

Question 4

Longus capitis

Answer 4

attachments- from the anterior tubercles of the transverse processes of cervical vertebrae to the basilar occipital bone

function- flexion of the head & neck (bilateral) ipsilateral rotation (unilateral)

innervation- ventral rami of cervical spinal n. (C1-3)

Question 5

Longus colli (L. neck)

Answer 5

attachments- from cervical vertebral bodies to cervical vertebral bodies & transverse processes

function- flexion, lateral flexion of the neck and ipsilateral rotation

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

Question 6

Mylohyoid

Answer 6

attachments- from the mylohyoid line of the mandible to the midline raphe & anterior aspect of body of the hyoid

function- elevation of the floor of the oral cavity

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

Question 7

Omohyoid (G. omos, shoulder)

Answer 7

attachments- from the superior border of the scapula medial to the scapular notch to the lateral aspect of the hyoid passing through an intermediate tendon sling loosely associated with the clavicle & 1st rib

function- depression of the hyoid

innervation- ansa cervicalis (C1-3)

Question 8

Anterior scalene

Answer 8

attachments- from the anterior tubercles of middle cervical vertebrae to the scalene tubercle of the 1st rib

function- elevation of 1st rib (during forced inspiration) & flexion lateral flexion & contralateral rotation of the neck

innervation- lower ventral rami of cervical spinal n.

Question 9

Middle scalene

Answer 9

attachments- from the transverse processes of cervical vertebrae to 1st rib

function- elevation of 1st rib (during forced inspiration) & lateral flexion & contralateral rotation of the neck

innervation- lower ventral rami of cervical spinal n.

Question 10

Posterior scalene

Answer 10

attachments- from lower cervical transverse processes to the 2nd rib

function- elevation of the rib (during forced inspiration) & lateral flexion and contralateral rotation of the neck

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

Question 11

Sternocleidomastoid

Answer 11

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

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

innervation- accessory n & C1,2

Question 12

Sternohyoid

Answer 12

attachments- from the posterior side of the proximal clavicle & adjacent manubrium to the inferior border of body of the hyoid

function- depresses the hyoid

innervation- ansa cervicalis (C1-3)

Question 13

Sternothyroid

Answer 13

attachments- from the posterior aspect of the manubrium & costal cartilage of 1st rib to the thyroid lamina

function- depression of the elevated larynx

innervation- ansa cervicalis (C1-3)

Question 14

Stylohyoid

Answer 14

attachments- from the styloid process of temporal bone to body of hyoid bone

function- elevation & retraction of the hyoid

innervation- facial n.

Question 15

Thyrohyoid

Answer 15

attachments- from the thyroid lamina to the greater horn of the hyoid bone

function- depression of the hyoid or elevation of the thyroid cartilage

innervation- ventral ramus of C1 via XII