C13

Question 1

Nucleis of VII

Answer 1

Motor: nucl. motorius n. facialis

sensory: nucl tractus spinalis n. trigemini
parasympathetic: nuc. salvatorius rostralis

spescial sensory: nucl. tractus solitorius rostralis

Question 2

Nuclei of IX

Answer 2

Motor – rostral part of nucleus ambiguous (vagus has the caudal part)

Parasympathetic – nucleus salvatorius caudalis (lecture notes) nucleus n. glossopharyngeus (Koenig)

General sensory – nucleus tr. Spinalis n.trigemini (lecture notes)

Special sensory – nucleus tr, solitaris caudalis (lecture notes)

Question 3

Path of the VII

Answer 3

Exits through the pons and enters into meatus acusticus internus, goes into the facial canal and exits the foramen stylomastoideum

within the facial canal it forms the ggl. geniculate (sensory cell bodies)

it also gives of branches within the canal and out of the foramen stylomastoideum only motor fibers exit to innervate the mimetic muscles of the face.

Question 4

VII within the facial canal

Answer 4

ggl. genicualte

1. n. petrosus major
2. r. communicans cum plexus tympani et n. petroso minori
3. n. stapedius
4. n. chorda tympani
5. (auricularis caudalis internus)

Question 5

N. petrosus major

Answer 5

will recieve sympathetic fibers from the n. petrosa profunda (ggl. cervicale craniale) before they together will enter the pterygoid canal and join the ggl. pterygopalatina of the maxillary nerve

Question 6

N. stapedius

Answer 6

Innervates the stapede muscle of the small stapede bone

Question 7

R.communicans cum plexus tympani et nervo petroso minori

Answer 7

will send a communicating branch to give parasympathetic fibers to the plexus tympani and the minor petrosal nerve (ggl. oticum)

Question 8

Chorda tympani

Answer 8

special sensory

will travel closely to bulla tympani, and at ggl. mandibularis it will join N. lingualis of the mandibular nerve.

innervates the rostral 2/3 of the tongue with gustatory sensory

mandibular gland and sublingual gland

Question 9

N. auricualris caudalis

Answer 9

first branch to leave after the facial nerve has exit throug froamen stylomastoideum

innervates the skin and muscles of the caudal ear, gives of r.platysma t othe platysm plexus

Question 10

VII after leaving the foramen stylomastoideum

Answer 10

N. auricularis caudalis

N. colli

r. digastricus
rr. parotidei

N. buccalis dors/ventr

N. auricolopalpebralis

Question 11

r.colli

Answer 11

innervates the deep and superficial platysma

M. auricularis ventralis

Question 12

r. digastricus

Answer 12

M. digastricus - caudal part ( cranial is supplied by the mylohyoid)

branch to the stylohyoid and in the horse also to the occiptiomandibular

Question 13

rr. parotidei

Answer 13

plexus parotideus

Question 14

N. auricolopalpebralis

Answer 14

N. auricularis rostralis

• rostral auricular plexus
  r. zygomaticus
• m.orbicularis oculi, sphincter muscle of the eye
  r. palpebralis
• upper eyelid

Question 15

N. buccalis dors/ventr

Answer 15

forms a buccal plexus

motor innervation to the ckeek and lips, joined by sensory fibers from IX (finn navn på branchen av IX)

Question 16

plexus auricularis rostralis

Answer 16

created by fibers from the facial and the trigeminal nerve

Question 17

Path of the glossopharyngeal nerve IX

Answer 17

it leaves the medulla oblungata and before exiting through the jugular foramen it forms a proximal ggl and just after leaving it will form the distal ganglion

Question 18

Branches of the glossopharyngeal nerve

Answer 18

N. tympanicus

N. sinus caroticus

r. M. stylopharyngeus caudalis
rr. pharyngeus
rr. lingualis

Question 19

N. tympanicus

Answer 19

leaves the glossopharyngeal nerve before it exits the foramen jugulare from the proximal ganglion

also known as Jackobsen

will enter the tympanic cavity where it will join in the formation of the tympanic plexus

N. petrosus minori is formed by the tympanic cavity and will serve the ggl. oticum with parasympathetic fibers (where it gives of parasympathetic branches to the buccal plexus)

it will be joined by a branch of r. communicans cum plexus tympanicus et petroso mino (VIII)

It will recieve sympathetic fibers from the joining of caroticotympani through the tympanic plexus

Question 20

Plexus tympanicum

Answer 20

recieves

• parasympathetic fibers from glossopharyngeal nerve through N. tympanicus
• sympathetic fibers through nn. caroticotympani
• recieves fibers from the facial nerve by: r. communicans cum plexus tympanicum et nervo petroso minor

Question 21

ggl. oticum

Answer 21

postganglionic fibers that goes to the parotid and buccal glands

Question 22

R. sinus carotici

Answer 22

branch of the main trunk of the glossopharyngeal which innervates baroreceptors in the wall of the carotid bulb and the chemoreceptors in the carotid body

Question 23

r. m. stylopharynges caudalis

Answer 23

closes the nasal way during vomiting

Question 24

rr. pharyngeus

Answer 24

runs to the dorsal pharyngeal wall

motor, sensory and parasympathetic fibers

Question 25

rr. lingualis

Answer 25

supplies the mucosa of the caudal third (gustatory) of the tongue. (division point is the vallate papillae)

motor, special sensory and parasympathetic