A&P Lab Cranial Nerves

*Usually a vague sensation of dull aching, gnawing or burning...
*Important stimuli for this type of pain are extreme stretching of tissue, ischemia, irritating chemicals and muscle spasm

pain stimuli arising in one part of the body are perceived as coming from another part

cord-like organ that is part of the peripheral nervous system

layer of loose CT that surrounds each axon

CT that binds groups of fibers into bundles called fascicles

encloses all the fascicles to form a nerve

*Purely sensory cranial nerve
*carry afferent impulses for sense of smell
*CLINICAL TESTING: sniff aromatics

loss of smell 

*Purely Sensory
*carry afferent impulses for vision
*CLINICAL TESTING: Snellen eye chart, peripheral vision

visual defects are known as:

*innervates 4 of the 6 extrinsic eyeball muscles
*contain proprioceptive afferents: Somexaatic motor fibers, Parasympathetic motor fibers, sensory afferents
*CLINICAL TESTING: examine pupils for size, shape and equality 

*Innervates superior oblique eye muscle
CLINICAL TESTING:Test with Oculomotor Nerve III

*largest cranial nerve in diameter
*sensory to face/motor to chewing
*Mixed, has 3 divisions
1.opthalmic V1
2.Maxillary V2
3.Mandibular V3

*Innervates lateral rectus eye muscle
*CLINICAL TESTING: tested with nerves III and IV

inflammation of the Trigeminal nerve,is widely considered to produce the most excruciating pain known

*Motor to face and taste
*mixed, parasympathetic motor impulses to the lacrimal gland and salivary gland
*CLINICAL TEST: anterior 2/3 of tongue to taste sweet, salty, sour, and bitter

What are the 5 branches of Facial Nerve VII

Paralysis of facial muscles on affected side and partial loss of taste sensation. May develop rapidly (overnight) Caused by inflamed or swollen facial nerve