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All these sensory fibers in the face stem from V1, V2, and V3, whichare all branches of the trigeminal nerve.

Cervical to this, it stems from the cervical plexus greater occipital,lesser occipital, and great auricular.

The temporal fossa is covered by the temporal fascia

Temporal fossa is superior to the zygomatic arch.

Temporal fossa is not part of facial expression, rather it is part ofchewing.

It attaches to the coronoid process of the mandible

Temporal muscle is supplied by the branch of the external carotoid

artery (maxillary artery) and it is supplied by V3 arteries andmandibular nerve (V3).

Muscles of facial expression are supplied by facial artery.

Inferior to the zygomatic arch, the parotoid gland extends to the angleof the jaw.

- parotid gland is covered by thick parotid fascia (supplied by thenerve branch auriculotemporal V3)

when the parotid gland expands, it causes intense pain cause there is

no room.- the pain is referred to TMJ joint and the ear drum

The facial nerve enters the facial canal, which it terminates at thestylomastoid foramen.

Facial nerve.. stylomastoid foramen supplies the five branches- temporal, zygomatic, buccal, mandibular, cervical

muscles of facial expression are supplied by these five branches.

The duct is compressed when you blow your mouth into a big bubble.

- some people have extra accumulation of proteins in uppermaxillary molars due to extra saliva from the parotid duct.

When the facial nerve around the stylomastoid foramen getscompressed, someone will experience bells palsy.

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Oribicularis oris (holds saliva in mouth)Oribiticularis occuli (holds eye up, tear usually goes lateral)

- if you have bells palsy, then orb. Occuli will allow tear to roll downthe eye.

Buccinator is paralyzed in bells palsy.. normal function is to push foodbetween teeth when you chew.

Motor part of the facial nerve is affected by bells palsy.

Chorda tympani..

Parasympathetic: increases salivary secretionOculumotorFacial

glossopharygnealAnd vagus

Divide all cranial nerves into four groups: Purely motor, purely sensory,mixed, and parasympathetic

Sympathetic fibers that supply the head region.

They are coming from the T1 and T2 spinal nerves and synapse ontosuperior cervical sympathetic ganglion and the postsynaptic fibers(thin and flimsy) travel on the branches of external and internal carotid

arteries and this is how they reach the other organs on the face.

Parotid Gland Autonomic Nerve supply:

Sympathetic: travel on the branch of external carotid.. which gives riseto maxillary artery which gives rise to middle meningitis(postganglionic sympathetic)

All of this is included in the infraorbital fossa .. if there is an abscesshere, then all of this will be affected.

Under your tongue you have salivary gland.

If you bite your tongue and you cant feel anything, theres somethingwrong with V3.