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Cranial Nerves

Biology

QuestionAnswer
Olfactory Olfactory Epithlium- Cribriform Plate of ethmoid bone- to synapse in olfactory bulbs Function: Carries afferent impulses associated with sense of smell. Test: Sniffing different aromas, and identifying each.
Olfactory Olfactory Epithlium- Cribriform Plate of ethmoid bone- to synapse in olfactory bulbs Function: Carries afferent impulses associated with sense of smell. Test: Sniffing different aromas, and identifying each.
Optic Retina of eye- Through optic nerve and canal of orbit- across optic chasima- and finally from the thalamus to the visual cortex as optic radiation. Function: Carries afferent impulses associated with vision. Test: Visual field is determined with eye cha
Oculomotor Dorsal Midbrain- Enters orbit- Exits skull through superior orbital fissure. Function: Helps direct the eyeball, constrict pupils, and connects eyeball to the brain. (Somatic, Parasympathetic, Sensory) Testing: Pupils are examined for size, shape, and e
Trochlear Midbrain- Exits from skull through superior orbital fissure. Function: Helps move the eyeball. Test: Tested with the oculomoter nerve.
Trigeminal From face to pons in three divisions. Function: Sensory nerve to the face and scalp, nose and floor of mouth. Test: Rub a cotton ball across the face to test senses.
Abducens Leaves inferior pons-enters orbit through superior orbits fissure- to run to eye. Function: Carries somatic fibers to rectus muscle that helps move the eyeball. Test: Test with oculomotor nerve.
Facial Leaves pons- travels through temporal bone- exiting through stylomastoid foramen to reach the face. Function: Supplies motion to the face, facial expression, motion to the salivary glands, and sense to the taste receptors to the tongue.
The term DORMATOMES Dormatomes are parts of the skin that can only be innovatated by cranial nerve 5, it's for sensation in the face.
Plexuses There are no plexuses at the thorax, they're a network of converging and diverging nerve fibers, blood vessels or lymphatics.
Why are Phrenic Nerves important They're the only nerve that innovates the diaphragm, the muscle that takes in air. The ones vital to live are C3, C4, and C5.
Vestibulocochlear Inner Ear Equilibrium/ Hearing apparatus-Through internal acoustic meatus- to enter pons. Function: Transmits impulses associated with the sense of hearing from the cochlea. Test: Hearing is tested by air and bone conduction using tuning fork.
Glossopharyngeal Medulla- leaves skull through the jugular foramen- and runs to the throat. Function: Innovates part of the tongue and pharynx, helps with swallowing, taste, and chemoreceptors. Test: Check gag reflexes through uvula, ask to speak and cough.
Vagus Medulla- descends through neck region into thorax and abdomen. Function: Carries somatic motor impulses to various places in the body.
Accessory
Hypoglossal
Created by: tallen149
 

 



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