Neck and Suprahyoids

Question 1

Sternocleidomastoid origin

Answer 1

Sternal- Manubrium

Clavicular- Superior Medial third of clavicle

Question 2

Sternocleidomastoid insertion

Answer 2

Mastoid process, superior nuchal line

Question 3

Sternocleidomastoid Action

Answer 3

Extend neck at A-O joint, Flex neck, raise thorax

-Laterally flex head/neck, rotate to opposite side

Question 4

Sternocleidomastoid Nerve

Answer 4

Spinal Accessory, C2,3- proprioception

Question 5

Sternocleidomastoid Blood

Answer 5

Arteries in neck

Question 6

Mylohyoid Origin

Answer 6

Mylohyoid line on mandible

Question 7

Mylohyoid Insertion

Answer 7

Median raphe from chin to hyoid bone, Body of hyoid bone (floor of oral cavity)

Question 8

mylohyoid action

Answer 8

Elevate hyoid, base of tongue and floor of mouth, Depress mandible

Question 9

Mylohyoid nerve

Answer 9

Trigeminal

Question 10

Stylohyoid Origin

Answer 10

Styloid process of temporal bone

Question 11

Stylohyoid Insertion

Answer 11

Body of hyoid, above omohyoid

Question 12

Stylohyoid Action

Answer 12

Elevate and retract hyoid to elongate oral floor (force couple to omohyoid)

Question 13

Stylohyoid Nerve

Answer 13

Facial N

Question 14

Digastric Origin

Answer 14

Posterior- Mastoid notch of temporal

Anterior- Digastric fossa of mandible

Question 15

Digastric Insertion

Answer 15

Greater horn of hyoid bone through fibrous loop

Question 16

Digastric Action

Answer 16

Elevate hyoid, base of tongue. Steadies hyoid in swallowing/speaking, Depress mandible against resistance

Question 17

Digastric Nerve

Answer 17

Posterior- Facial N

Anterior- Trigeminal N

Question 18

Geniohyoid Origin

Answer 18

Inferior mental spine of mandible on mental symphysis

Question 19

Geniohyoid Insertion

Answer 19

Anterior body of hyoid

Question 20

Geniohyoid Action

Answer 20

Elevate hyoid and draw foreward, shortening oral floor, retract and depress mandible when hyoid fixed

Question 21

Geniohyoid Nerve

Answer 21

Hypoglossal N