PNS Flashcards
composed of the cranial nerves arising from the brain and spinal nerves

Peripheral nervous system
most anterior sensory nerve; transverses the formamina in the ethmodial cribriform plate

olefactory nerve I
senesory: smell
tip of the nerve

olfactory bulb
impluses pass through here to the cerebral cortex to be interperpeted

olfactory bulb
anterior portion leading to eye; passes through the opic canal

optic nerve II
sensory; sight
middle portion of the X

optic chiasm
where it comes together
posterior portion that leads posteriory to the thalumus

optic tract
motor: ciliary muscles, constricts pupil, extrinsic eye muscles except superior oblique and lateral rectus

oculomotor nerve III
motor:superior oblique muscle of the eye

trochlear nerve IV
largest cranial nerve

trigeminal nerve V
patricks armpit
innervates scalp and forehead region

ophthalmic division V1
through the foramen rotumdum to the upper jaw region

maxillary division V2
through the foramen ovale to the lower jaw region

mandibular division V3
motor: lateral rectus of eye

abducens nerve VI
sensory: taste (anterior 2/3 of tounge)
Moter: muscels of facial expression, secretion of saliva and tears

facial nerve VII
Sensory: hearing balance and posture

vestibulocochlear nerve VIII
sensory: taste (posterior 1/3 of tounge)
motor: smallowing and secretion of saliva

glossopharyngeal nerve IX
sensory and motor: 70% of the parasympathetic division of the ANS

Vagus nerve X
Motor: trapezius and sternoclediomastoid

accessory nerve XI
Motor: muscles of the tongue

hypoglossal nerve XII
group of nerves that supply the upper limbs

brachial plexus
Y nerve

Median nerve

ulnar nerve

radial nerve

musculocutaneous nerve

lumbosacral plexus
anterior side

femoral nerve
posterior side

sciatic nerve
anterior side; branch of sciatic nerve

tibial nerve
posterior side; branches off from the sciatic nerve

common fibular (peroneal nerve)

tongue

lingual frenulum
connects the tongue to the bottom of the mouth

papillae

fifiform papillae
fills in all the rest of the space

fungiform papillae
tastebuds

circumvallate papillae
big ones at the back of the tongue

palpebrae
eyelid

levator palpebrae superioris

lacrimal gland
lateral side

exretory lacrimal ductules
(model only)

caruncle

lacrimal punctum
tears drain

lacrimal canals
(model only)

lacrimal sac
(model only)

nasolacrimal duct
(model only)

tarsal glands
(model only)

superior oblique

trochlea
(model Only)

superior rectus

medial rectus

inferior rectus

inferior obique

lateral rectus

sclera
whites of eyes

conjunctiva
keeps things from getting outside to the inside of your head
covers anterior portion of eye

cornea
middel layer

choroid

ciliary body

ciliary zonules
(suspensory ligament)
(model only)

iris

ora serrata
(model only)
posterior to iris and pupils

lens
surrounded by iris

PUPIL
innermost layer of the wall of the eye

retina

macula lutea
(model Only)

fovea centralis

optic disc

optic nerve II

anterior chamber

posterior chamber
fulid that fills the anterior and posterior chambers, this fluid helps maintain intraocular pressure
aqueous humor

vitreous chamber
viscous fluid that fills the vitreous chamber of the eye, provides intraocular pressure
vitreous humor
consists of auricle and external autitory canal
external ear

auricle

external auditory (acoustic) canal
contains the auditory ossicles and associated structors within the tympanic cavity
middel ear

tympanic membrane
(transparent)
three small bones of the middel ear that reiceve vibrations from the tympanic memebrane and transmit them to the oval window
auditory ossicles

malleus
3 prongs

incus

stapes
triangle
skeletal muscle that rubs along the auditory tube and inserts on the malleous

tensor tympani muscle

vestibular (oval) window

cochlear (round) window

auditory (eustachian) tube
composed of bony labyrinth cavity that houses the vestibule and cochlea
inner ear

vestibule

vestibular nerve

semicircular canals

cochlea

choclear nerve

scala vestibule
vest goes on top

vestibular membrane

scala tympani
panties go on the bottom

basilar membrane
goes all the way across
fluid contained within the scala vestibuli anf the scala tympani of the cochlea
perilymph

cochlear duct
fluid contained in the cochlear duct
endolymph

spiral organ of corti
serve as sound receptors in the basilar membrane
cochlear hair cells

tectorial membrane
half way through