Submandibular triangle

Question 1

Origin and insertion of the diagstric, anterior belly

Answer 1

origin: digastric fossa of mandible
insertion: hyoid bone via digastric tendon

Question 2

Origin and insertion of the digastric, posterior belly

Answer 2

origin: medial aspect of mastoid process
insertion: hyoid bone via the digastric tendon

Question 3

innervation of the digastric, anterior belly

Answer 3

mylohyoid nerve (CN V3)

Question 4

innervation of digastric, posterior belly

Answer 4

CN VII

Question 5

Action of digastric, anterior belly

Answer 5

lowers mandible or raises hyoid

Question 6

action of digastric, posterior belly

Answer 6

elevates and retracts hyoid

Question 7

origin and insertion of mylohyoid

Answer 7

origin: mylohyoid line of mandible
insertion: hyoid bone and mylohyoid raphe

Question 8

origin and insertion of geniohyoid

Answer 8

origin: inferior mental spine of mandible
insertion: hyoid bone

Question 9

origin and insertion of stylohyoid

Answer 9

origin: syloid process
insertion: body of hyoid bone

Question 10

innervation of mylohyoid

Answer 10

mylohyoid nerve (CN V3)

Question 11

innervation of geniohyoid

Answer 11

C1 branch traveling with CN XII

Question 12

innervation of stylohyoid

Answer 12

CN VII

Question 13

action of mylohyoid

Answer 13

supports and elevates floor of mouth

raises hyoid

Question 14

action of geniohyoid

Answer 14

draws mandible and hyoid toward each other

Question 15

action of stylohyoid

Answer 15

eleavates and retracts hyoid

Question 16

Origin and insertion of hyoglossus

Answer 16

origin: greater horn of the hyoid bone
insertion: lateral tongue

Question 17

Origin and insertion of genioglossus

Answer 17

origin: superior mental spine
insertion: hyoid bone, tongue

Question 18

Origin and insertion of styloglossus

Answer 18

origin: styloid process
insertion: lateral tongue

Question 19

Origin and insertion of palatoglossus

Answer 19

origin: posterior margin of he hard palate, palatine aponeurosis
insertion: lateral tongue

Question 20

innervation of hyoglossus

Answer 20

CN XII

Question 21

innervation of genioglossus

Answer 21

CN XII

Question 22

innvervation of styloglossus

Answer 22

CN XII

Question 23

innervation of palatoglossus

Answer 23

CN X, pharyngeal branches

Question 24

action of hyoglossus

Answer 24

depresses and retracts the tongue

Question 25

action of genioglossus

Answer 25

protrudes, depresses and retracts the tongue

Question 26

action of the styloglossus

Answer 26

retracts and elevates the tongue

Question 27

action of the palatoglossus

Answer 27

depresses the palate

elevates the back of the tongue