C12

Question 1

What is the name of cranial nerve V

Answer 1

N. trigeminalis

Question 2

Describe the nuclei situation of the N.V

Answer 2

Mostly sensory nucleis

Sensory:

• Nuclei tr. mesocephalis
• Nuclei sinsitilis pontus
• Nuclei tr. spinalis N. trigemini

Motor:

• nucl motorius N. trigemini

Question 3

Path of the trigeminal from the brain

Answer 3

Recieves its fibers and exits thorugh the pons, enters the trigeminal canal, where the gl. trigmeniale can be found, conisting of sensory cell bodies. before it splits into the three main branches

V1: N. opthalmicus

V2: N. maxillaris

V3: N Mandibularis

Question 4

The main branches of V1

Answer 4

will exit the fissura orbitalis

V1 = N. opthalmic

N. frontalis

N. nasociliaris

N. lacrimalis

Question 5

The path of the N. frontalis

(What it supplies and its branches)

Answer 5

N. frontalis

first branch to leave, travels rostrally to supply the lateral skin of the upper eyelid, the nasal mucosa, the skin of the nose and also the eyeball

N. supratrochlearis

N. supraorbitale

Question 6

The main branches of N. nasociliaris and what it supplies

Answer 6

It communicates with the ciliary ganglion, works together with the oculmotor nerve on ciliary muscles

Nn. ciliaris longi

Will enter the eyeball dorsal and medial to the optic nerve

N. ethmoidalis

is the terminal branch of the nasociliar, it will enter the ethmoid for<men></men>

<p><strong>N. infratrochlearis</strong></p>

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Question 7

The path of the lacrimal gland

Answer 7

It will leave the opthalmic nerve to innervate the lacrimal gland

Question 8

Path of the N. maxillaris

Answer 8

V2

• Sensory to superior eyelid, nasal mucosa, superior teeth, superior lip and nose
• Innervates the lacrimal, nasal and palatine glands with postganglionic parasympathetic axons

will travel rostrall toward the infraorbital foramen ater exiting the foramen rotundum (canalis alris –> foramen alare rostrale)

where it will continue as the infraorbital nerve, but it will first give of the

N. zygomaticus

• R. zygomaticofacilis - lateral to lig.orbitale (ca) to supply the upper eyelid
• r. zygomaticotemporalis - medial to lig. orbitale (ca) to supply the temporal muscle and join the rostral auricular plexus

N. pterygopalatinus

will form the ggl. pterygopalatinus and give of two branches before it continues as

N. caudalis nasi

which enters the foramen sphenopalatinum to enter the nasal cavity and supply the ventral meatus and nasal mucosa

N. palatinus major

exits the ggl to enter palatine canal to exit into the hard palate by the for. palatinum major, here it will supply the hard palate and its mucosa (rugae)

N. palatinus minor

will go to the soft palate to innervate it and its gustatory papillae

M. infraorbitale

enters foramen maxillare, where it will give of the rr. alveolares maxillaris. the canal is divided into sections:
caudal: supplies the superior cheeck teeth, r dentalis + gingivalis

Medi: will also supply the upper cheek teeth

Rostral: enters the incisivomaxillary canals to supply the superior canine and incisor teeth

R. nasalis externi

exits the foramen infra orbitale tp supply th eupper lip and nose

Question 9

The course of the mandibular nerve

Answer 9

• Both motor and sensory
  
  • Sensory: cheek, inferior labium, tongue, teeth of mandible, inferior lip, skin of the head and ski of the intraosseous part of the external ear canal
• Innervates: masseter, temporalis, medial and lateral pterygoids, rostral digastricus and mylohyoids
• Leaves foramen ovale

Branching

N. masticatorius

a motor nerve which gives of

N. massetericus and N. temporalis (profundus)

N. pterygoideus lat/med

N. tensor tympani

N. tensor veli palatini

N. buccalis

which runs under the masseter, gives of communicating branches to both of its dorsal and ventral branches. it recieves parasympathetic fibers from the ggl. oticum (IX) innervates the oral mucosa

N. auriculotemporalis

which will communicate with the facial nerve, gives of:
N. transversa faciei
N. auriculuaris rostralis
R. parotidei
R. meatus acusticus externa
R. membrana tympani (sensory)

before it enters the foramen mandibulare it wil give of the

N. lingualis

which will supply the rostral 2/3 of the tongue with sgeneral sensory function

the special sensory of gustatory is freom th efacial nerve

it will give of:
N.mylohyoideus
N.sublingualis
r. lingualis - joined by special gustatory and chorda tympani (PS)

As it enters the foramen mandibulare it wil give of N. alveolaris mandibularis supplying the lower teeth

N. mentalis

exits the foramen mentale to innervate the lower lip