Quick anatomy review

olfactory (I)

smell

sensory

optic (II)

vision

sensory

oculomotor (III)

eye movement

motor

trochlear (IV)

SO4 eye up and down

motor

trigeminal (V)

facial sensation, chewing muscles

sensory/motor

abducens (VI)

LR6 eye side to side

motor

facial (VII)

facial expression 2/3 taste

sensory/motor

vestibulocochlear (VIII)

hearing and balance

sensory

glossopharyngeal (IX)

taste posterior 1/3 and swallowing

sensory/motor

vagus (X)

parasympathetic control

sensory/motor

accessory (XI)

head turn/shoulder shrug

motor

hypoglossal (XII)

tongue movement

motor

cerebrum

conscious thought, memory, voluntary movement

frontal lobe

motor control, planning, speech

parietal lobe

touch, taste, spatial sense

temporal lobe

hearing, smell, memory

occipital lobe

vision

thalamus

sensory relay

hypothalamus

homeostasis, ANS, horomones

midbrain

reflexes and posture

pons

breathing rhythm

medulla

heart rate, breathing, blood pressure

cerebellum

coordination and balance

limbic system

emotion and memory

RAS

consciousness

basal nuclei

smooth muscle movement

corpus callosum

connects hemispheres

alpha 1

vasoconstriction

alpha 2

vasodilation

beta 1

increased heart rate

beta 2

bronchodilation

beta 3

thermoregulation

cholinergic

release ACh

nicotinic (always excitatory)

muscarinic (excitatory or inhibitatory)

adrenergic

release NE and adrenaline

parasympathetic

rest and digest

preganglionic = long axons

post = short

sympathetic

fight or flight

preganglionic = short

post = long myelinated

afferent

towards the CNS

efferent

away from CNS

smell is in what part of the brain

hypothalamus

vallate

bitter

fungiform

sweet and salty

foliate

sour

umami

everywhere but filiform

cochlea

hearing

organ of corti

sound transduction

semicircular canals

rotation detection

utricle

horizontal acceleration

saccule

vertical acceleration

vestibular nerve

balance signals

cochlear nerve

hearing signals

preganglionic

ACh → nicotinic (always)

parasympathetic

ACh → muscarinic

sympathetic

NE except sweat glands = ACh