[ANAT] SUPRA & INFRA HYOID MUSCLES

Question 1

Origin of anterior belly of digastric

Answer 1

digastric fossa of mandible

Question 2

insertion of anterior belly of digastric

Answer 2

intermediate tendon held to hyoid by fibrous loop (from investing fascia)

Question 3

Origin of posterior belly of digastric

Answer 3

digastric notch of mastoid process

Question 4

insertion of posterior belly digastric

Answer 4

intermediate tendon held to hyoid by fibrous loop (from investing fascia)

Question 5

origin of stylohyoid

Answer 5

posterior surface of styloid process

Question 6

insertion of stylohyoid

Answer 6

hyoid bone where its tendon gets perforated by posterior digastric

Question 7

origin of mylohyoid

Answer 7

mylohyoid line of mandible

Question 8

insertion of anterior & middle fibers of mylohyoid

Answer 8

mylohyoid raphae

Question 9

mylohyoid raphae extends from…?

Answer 9

symphysis menti to hyoid

Question 10

origin of geniohyoid

Answer 10

inferior genial tubercle of mandible

Question 11

insertion of geniohyoid

Answer 11

hyoid bone

Question 12

nerve supply of anterior belly of digastric

Answer 12

nerve to mylohyoid

Question 13

nerve supply of posterior belly of digastric

Answer 13

facial nerve

Question 14

nerve supply of stylohyoid

Answer 14

facial nerve

Question 15

nerve supply of mylohyoid

Answer 15

nerve to mylohyoid

Question 16

nerve supply of geniohyoid

Answer 16

C1 via hypoglossal nerve

Question 17

actions of digastric

Answer 17

1-depresses mandible when hyoid is fixed
2-elevates hyoid during swallowing

Question 18

actions of stylohyoid

Answer 18

pulls hyoid upwards & backwards

Question 19

actions of mylohyoid

Answer 19

1-elevates floor of mouth during swallowing
2-helps in depression of mandible
2-supports diaphragma oris (floor of mouth)

Question 20

actions of geniohyoid

Answer 20

1-depresses mandible
2-elevates hyoid

Question 21

what perforates the tendon of stylohyoid

Answer 21

posterior belly of digastric

Question 22

most anterior/superficial suprahyoid muscle

Answer 22

anterior belly of digastric

Question 23

deepest suprahyoid muscle

Answer 23

geniohyoid

Question 24

which pharyngeal arch do the anterior belly of the digastric & mylohyoid originate from?

Answer 24

1st pharyngeal arch

Question 25

which pharyngeal arch do the posterior belly of digastric & stylohyoid originate from?

Answer 25

2nd pharyngeal arch

Question 26

origin of sternohyoid

Answer 26

back of manubrium + medial end of clavicle

Question 27

insertion of sternohyoid

Answer 27

hyoid

Question 28

origin of sternothyroid

Answer 28

back of manubrium + 1st costal cartilage

Question 29

insertion of sternothyroid

Answer 29

oblique line of thyroid cartilage

Question 30

origin of thyrohyoid

Answer 30

oblique line of thyroid cartilage

Question 31

insertion of thyrohyoid

Answer 31

lower border + greater horn of hyoid

Question 32

origin of the superior belly of omohyoid

Answer 32

hyoid

Question 33

insertion of both bellies of omohyoid

Answer 33

intermediate tendon held in place by facial sling connected to clavicle

Question 34

origin of inferior belly of omohyoid

Answer 34

upper scapula + suprascapular notch & ligament

Question 35

nerve supply to sternohyoid

Answer 35

ansa cervicalis

Question 36

nerve supply to sternothyroid

Answer 36

ansa cervicalis

Question 37

nerve supply to thyrohoid

Answer 37

C1 that accompanies hypoglossal nerve

Question 38

nerve supply to omohyoid

Answer 38

ansa cervicalis

Question 39

actions of sternohyoid

Answer 39

depresses hyoid after its elevation during swallowing & vocalization

Question 40

actions of sternothyroid

Answer 40

depresses larynx after its elevation during swallowing & vocalization

Question 41

actions of thyrohyoid

Answer 41

depresses hyoid + elevated larynx

Question 42

actions of omohyoid

Answer 42

1-depresses hyoid during prolonged inspiration
2- tenses lower deep cervical fascia