topic 6

Question 1

sensory innervation

Answer 1

XI: n. glossopharyngeus (caudal 1/3)
V3: n. lingualis (rostral 2/3)

Question 2

motor innervation

Answer 2

XII: n. hypoglossi is the only motor nerve

Question 3

a. lingualis continuation

Answer 3

a. liguae profunda: lat on genioglossus then rostrally enters tongue

Question 4

mechanical papillae of tongue

Answer 4

filiform - corpus and apex

conical - radix

Question 5

gustatory papillaeof tongue

Answer 5

corpus/apex: fungiform (red-ish)

radix: circumvallate and foilata

Question 6

what are the extrinsic mm of the tongue, their innervation?

Answer 6

genioglossus, hyoglossus and styloglossus

innervated by XII n. hypoglossus

Question 7

what are the intrinsic mm of the tongue

Answer 7

crossection:
dorsal - superficial longitudinal fibers
middle - transversd fibers
ventral - deep longitudinal fibers and perpendicular fibers(rounded structure, a/v profunda linguae prox to it

Question 8

papilla in infants aiding suckling

Answer 8

marginal papillae

Question 9

name functions of the tongue

Answer 9

aid mastication mm(chewing), breathing, tasting, swallowing, drinking, speech, licking

Question 10

name the 6 bones of the hyoid bone

Answer 10

in order: thyro, basi, cerato, epi, stylo, tympano

Question 11

structures only in canine

Answer 11

sulcus mediana, lyssa

Question 12

fleshy connection btw the ventral part of tongue and ventral part of oral cavity

Answer 12

frenulum linguae

Question 13

dentation formula dog

Answer 13

I:3/3 C:1/1 P:4/4 M:2/3

UPPER/LOWER