Muscles of the tongue

Question 1

m.genioglossus

Answer 1

O: Os mandibulae, pars incisiva to hyoid bone

I: Enters tongue ventrally

A: Draws tongue ventrally and rostrally

Question 2

Arterial blood supply of tongue

Answer 2

a. lingualis (ex. a. carotis externa in Ca/Su, ex. linguofacial in Ru/Eq)
a. sublingualis (ex. a lingualis in Ru/Su, ex. submentalis ex.facialis in Eq/Ca)

Question 3

Venous drainage of tongue

Answer 3

v. lingualis (ex. truncus linguofacialis)

v. sublingualis (ex. v. lingualis in Ca/Su/Ru, ex. v. lingufacialis in Eq)

Question 4

Innervation of tongue

Answer 4

Rostral part of tongue:
V3 n. mandibularis – n. lingualis– n.sublingualis
VII n.facialus – chordea tympani

Caudal part of tongue:
IX n.glossopharyngeus– rr. linguales
XII n.hypoglossus (Motor) supply tongue muscles

X. vagus (root of tongue)

Question 5

Extrinsic muscles of the tongue

Answer 5

(....-glossus)
m.genioslossus
m.styloglossus
m.hyoglossus
(skeleton--tounge)
extrinsic muscles: attached to skeleton

Question 6

Intrinsic muscles of the tongue

Answer 6

m.lingualis proprius
forms bulk of tongue, no muscle fibers attached to skeleton.

Fibrae longitudinales superficial
- profunda (eq)

Fibrae transversus
Fibrae perpendicularis

Question 7

Muscles going to hyoid bone

Answer 7

(... -hyoideus)
Dorsal muscles:
m. mylohyoideus
m.geniohyoideus
m.stylohyoideus

Ventral muscles:

m. sternohyoideus
m. sternothyroideus
m. thyrohyoideus

Question 8

m.genioglossus

Answer 8

O: Os mandibulae, pars incisiva to hyoid bone

I: Enters tongue ventrally

A: Draws tongue ventrally and rostrally

Question 9

m.styloglossus

Answer 9

O: Ventral of stylohyoideum

I: apex of tongue

A: Retracts tongue

Question 10

m.hyoglossus

Answer 10

O: Hyoid bone

I: Between m.genioglossus (med) and m.styloglossus (lat).

A: Retracts and depresses tongue