The maxillary nerve

What to know?

Maxillary nerve

typeorigin

course

branches

termination

Clinical notes

notes

questions

Type and origin

Type:• Maxillary nerve is sensory

Origin:• It is 2nd division of trigeminal

nerve(5th cranial nerve).

Course:Lateral wall of cavernous sinus

passing through foramen rotundum

enter pterygopalatine fossa

the pterygomaxillary fissure

infratemporal fossa

Termination

Runs forwards in floor of orbit as infraorbital nerve

passes through infraorbital groove

infraorbital canal

comes out on face through infraorbital foramen on facial surface of maxilla

يارب

Branches: • meningeal branches

In cranial cavity

• 2 ganglionic branches pterygopalatine fossa

• posterior superior alveolar• zygomatic nerve: (a) zygomatico-temporal

(b) zygomatico-facial

In infratemporal fossa

• anterior & middle superior alveolar nervesIn infraorbital canal

• labial, nasal, palpebral .In face

Sphenopalatine (pterygopalatine) ganglion:

Definition

Site• Orbital branches ,pharyngeal branches• Greater & lesser palatine nerves• Short & long sphenopalatine nervesBranches• Sensory• sympathetic, parasympatheticRoots

N.B.

Notes :

• Patients who present with a large canine space abscess make it very difficult for a clinician to achieve an adequate level of local anesthesia due to the abscess. In these cases, a maxillary nerve block may be helpful in providing good local anesthesia in order to perform treatment.

Maxillary Nerve Block

• Loss of sensation in maxillary area.

Nerve lesion

Clinical notes:

Clinical notes :•Pterygopalatine ganglion is termed as ganglion of hay fever which is characterized by tears & running nose .

Notes: Embryonic origin :

•Nervous system from ectoderm ,ectoderm gives 3 parts: neural tube neural crest , placodes . •Neural tube: cranial end brain vesicle brain .•Brain: prosencephalon , mesencephalon , rhombencephalon•Rhombencephalon :melencephalon , myelencephalon .•Melencephalon : cerebellum,pons•Pons: ventral surface 5th cranial (trigeminal)nerve midway between upper& lower borders of Pons •5th cranial nerve : 2 roots lateral sensory large medial motor small

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QuestionsOne of department questions

1990 : Describe distribution & formation of maxillary nerve

8/2002

1/20038/2006 : origin ,course, enumerate

branches of maxillary nerve