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Nervous System
N/A
129
Anatomy
Undergraduate 1
04/04/2011

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Cards

Term
Somatic Motor System
Definition

Motor neuron and axon to skeletal muscle

-spinal cord to verntral root to spinal nerve to ventral ramus or dorsal ramus to skeletal muscle

Term
ANS
Definition

Visceral motor syste

regulates body temp

coordinates many system functions(cardio, respiratory, digestive, excretory, reproductive)

routine physiological adjustments made subconsciously

Term
ANS Innervates
Definition

Smooth

Cardiac

glands

Term
Sympathetic system
Definition
thoracolumbar
Term
Parasympathetic system
Definition
carniosacral
Term
Two neuron systems
Definition

preganglionic

postganglionic

Term
Preganglionic neurons
Definition

visceral motor cell bodies in CND

axon is preganglionic fiber

axons synapse on postganglionic neurons

Term
postganglionic neurons
Definition
visceral motor cell bodies located within ganglia in PNS axon is postganglionic fiber
Term
Somatic motor
Definition

skeletal muscles

one neuron system

Term
Visceral motor
Definition

smooth muscle

cardiac muscle

glands

two neuron systems- ANS

Term
Two parts of visceral motor/ANS
Definition

sympathetic

parasympathetic

Term
Sympathetic system
Definition

thoracolumbar division

T1-L2

Term
Parasympathetic system
Definition

craniosacral system

brainstem and cranial nerves 3 7 9 10

s2 3 4 spinal cord segments

Term
Sympathetic divison
Definition

post gang. in sympathetic chain/trunk or collarterla ganglia

functions are stimulate tissue metabolism, increase alertness, prepare body to deal with emergencies

Term
Fight or flight
Definition
sympathetic division
Term
Sympathetic pregang.
Definition
T1-L2 to ventral root to spinal nerve to ventral ramus to white communicating ramus to either sympathetic trunk/chain or collateral ganglia
Term
Adrenal gland- Medulla
Definition
receives preganglionic sympathetic fibers
Term
Sympathetic Division
Definition

pregang. in t1-l2

post gang. in sympathetic trunk

collateral gang. in abdominal caivty

Term
Sympathetic post gang.
Definition

sympathetic trunk to gray communicating ramus to skin, sweat glands, erector pili muscles, or blood vessels

or to organs via visceral nerve

Term
How many pairs of white communicating rami
Definition
14
Term
How many pairs of gray communicating ramus
Definition
31- in whole spinal cord
Term
Collateral Gang.
Definition

postgangli. sympathetic neurons

innervate abdominopelvic viscera

postgang. axons from collateral gang. enter into plexuses by way of visceral nerves

Term
Parasympathetic Division
Definition

crainosacral

visceral motor/efferent from brain stem and sacral spinal cord segments

conserve energy and promote sedentary activites

Term
Rest and repose
Definition
Parasympathetic division
Term
Parasympathetic division actions
Definition
pupuil constriction, digestive gland secretion, hormone secretion for nutrient absorption, increased digestive tract activity, defecation actives, urination activities, reduced heart rate, respiratory passage constriction, sexual arousal
Term
CN3
Definition
oculormotor
Term
CN7
Definition
Facial
Term
CN9
Definition
Glossopharyngeal
Term
CN10
Definition
Vagus
Term
Cilary ganglion
Definition
CN3
Term
Pterygopalatine ganglion
Definition
CN7
Term
Submandibular ganglion
Definition
CN7
Term
Otic
Definition
CN9
Term
Ganglia in the wall of organs
Definition
CN10
Term
dilator muscle
Definition
sympathetic
Term
constrictor muscle
Definition
parasympathetic
Term
Horners syndrom
Definition

lesion anywhere along the sympathetic pathway causes

-miosis(constricted pupil)

-decreased sweating

-vasodilation

-partial ptosis

Term
PREgang parasympathetic and POSTgang sympathetic fibers intermingle in wheat?
Definition

Nerve plexuses-

cardiac

pulmonary

esophageal

celiac

inferior mesenteric

hypogastric

Term
All pregang. fibers release what
Definition
acetylocholine
Term
Postganglionic parasympathetic fibers release what
Definition
acetylocholine
Term
Postgang sympathetic fibers release what
Definition
norepinephrine/epinephrine
Term
Nociceptors
Definition
tissue damage- pain
Term
free never ending
Definition
nociceptors- referred pain
Term
thermoreceptors
Definition
change in temp- free never ending
Term
mechanoreceptors
Definition

physical distortion or contact onto receptor

pressure, touch, and vibration

Term
chemoreceptors
Definition
monitor chemical composition in body fluid
Term
olfactory nerve
Definition
CN1
Term
Tase Cranial Nerves
Definition
CN 7 9 10
Term
Hearing and Equilibrium CN
Definition
CN8
Term
Bony labyrinth
Definition
membranous labyrinth surrounded by bone with a cavity inside
Term
perilymph
Definition
fluid in bone labyrinth
Term
crista ampullaris
Definition
receptors in semicircular canals
Term
Vestibule contains
Definition
membranous saccule and utricle
Term
cochlea cavity contains
Definition
scala tympani and scala vestibuli
Term
palpebrae
Definition
eyelid
Term
glands in eyes
Definition
sebaceous, tarsal(prevents eyelids from sticking together), and lacrimal(secretes tears)
Term
tarsal plate
Definition
dense connective tissue
Term
conjuctiva
Definition
mucous membrane that covers eyeball and inner part of eyelid
Term
types of conjuctiva
Definition
palpebral and bulbar
Term
lacrimal apparatus
Definition
lacrimal gland, puncta, canals , sac, and nasolacrimal ducts
Term
outer fibrous eye layer
Definition
sclera and cornea
Term
sclera
Definition
white of eye
Term
cornea
Definition
transparent and continuous with sclera at limbus
Term
vascular tunic
Definition

contains blood vessels and intrinsic eye mucles

choroid, iris, and ciliary body with ciliary muscles

Term
choroid
Definition
extensive network blood vessels to supply eye
Term
iris
Definition
has intrinsic muscles that control the pupil
Term
pupillary sphincter muscles
Definition
parasympathetic control
Term
pupillary dilator muscles
Definition
sympathetic control
Term
accommodation
Definition
lens is changeable in size
Term
neural tunic- retina
Definition

outer pigmented layer

inner neural layer

Term
rods
Definition

lights sensitive

important in low light condition

do not differentiate between colors

Term
cones
Definition
color vision, sharp and clear vision
Term
macula
Definition

area in retina where image arrives

has only cone- no rods

Term
fovea
Definition
area in macula of sharpest vision
Term
vitreous eye chamber
Definition
gelatinous vitreous humor, maintain shape of eyeball, supports lens
Term
anterior eye chamber
Definition
contains aqueous humor, continuously secreted by epithelia cells in posterior chamber, passes into anterior chamber and then into veins of eye
Term
vasodilation
Definition
causes pin face, blushing
Term
partial ptosis
Definition
eyelid halfway down, smooth fibers arent working
Term
oculomotor nerve ps division
Definition
constriction of iris
Term
facial nerve ps division
Definition
secretion of salivary glands, lacrimal glands, and nasal glands
Term
glossopharyngeal ps divison
Definition
secretion of salivary gland
Term
vagus ps division 
Definition
regulation of function of organ
Term
receptor
Definition
a specialized cell or process that monitors conditions in the body or in the external environment
Term
General senses
Definition
receptors distributed throughout the body- temp, pain, touch, pressure, vibration, proprioception
Term
Special senses
Definition

located in specialized sense organs- olfaction, gustation, equilibrium/balance, hearing, vision

sensory receptors specialized cell that sends sensation to CNS

Term
receptive field
Definition
area monitored by a single receptor cell
Term
exteroceptors
Definition
tells the CNS about external environment
Term
proprioceptors
Definition
tell the CNS about body position (muscles and joints)
Term
interoceptors
Definition
tell the CNS about internal environment (monitor condition inside body)
Term
Nocicepters
Definition

pain

respond to stimuli associated with tissue damage

sensitive to extreme temps, mechanical damage, or dissolved chemicals

fast or slow pain

free nerve endings

Term
thermoreceptors
Definition

responds to changes in temperature

conduct sensations along same pathway as nociceptors

free nerve endings

Term
Mechanoreceptors
Definition
responds to physical distortion, contact, or pressure
Term
tactile receptors
Definition
touch, pressure, vibration
Term
braoreceptors
Definition
pressure changes in walls of vessels, tracts
Term
proprioceptors
Definition
position of joints and muscles
Term
Chemoreceptors
Definition

monitor chemical composition of body

important in cardiovascular and respiratory functions

Term
free nerve endings
Definition
pain, simplest type of receptor
Term
tactile discs
Definition
fine/discrimitive touch and pressure
Term
root hair plexus
Definition
free nerve endings
Term
tactile corpuscles
Definition
touch, movement and vibration
Term
Ruffini corpuscles
Definition
pressure sensation
Term
lamellated corpuscles
Definition
heavy pressure or vibration sensation
Term
Referred pain
Definition
pain sensation originating in visceral organs
Term
baroreceptors
Definition

stretch receptor

digestive tract, bladder, carotid sinus and aortic sinus, lungs, colon

Term
Chemoreceptors
Definition
medulla oblongata, carotid bodies, aortic bodies
Term
olfactory receptor cells
Definition
neurons sensitive to chemicals which dissolved in mucus, almost present supporting cells and basal cells(stem cells), covered in secretions of olfactory glands, olfactory cells replaced by new cells from basal cells
Term
Gustatory/tase receptor cells
Definition
found in taste buds that form pockets in the epithelium of the papillae, usually on the tongue
Term
ossicles
Definition
malleus, incus, stapes
Term
Inner ear
Definition
senses of equilibrium and hearing are found in inner ear, receptors are within the fluid filled tubes and canals(membranous labyrinth)
Term
Membranous labyrinth
Definition

receptors are within this fluid filled tubes and canals

endolymph

Term
Boney Labyrinth
Definition

perilymph

bone forming a canal/chamber system

Term
Cochlea
Definition
elongated coiled portion of membranous labyrinth, surrounded by part of the boney labyrinth (tympanic and vestibular ducts), organ of corti(receptors)
Term
Vestiblue
Definition
space with two membranous sacs (utricle and saccule)
Term
macula
Definition
receptor in the vestibule, sensations of gravity and linear acceleration
Term
crista ampullaris
Definition
receptor in canals of boney labyrinth
Term
Hair cell
Definition
actual receptors cells are hair cells in the organ or corti, macula, and crista ampullaris, stereocilia on surface of hair cells, surrounded by supporting cells
Term
Organ of corti
Definition
receptors for hearing
Term
Macula
Definition

receptor for linear acceleration

found in utricle and saccule of membranous labyrinth

Term
Macula
Definition
Hair cells within maculae, cillia contact otoliths/satoconia in gelatinous matrix, tilting head shifts otoliths which distorts hair cells causing them to fire off
Term
Anterior semicircular duct
Definition
"yes"
Term
Lateral semicircular duct
Definition
"no"
Term
Posterior semicircular duct
Definition
"tilting head"
Term
crista ampullaris
Definition
receptor for angular movement
Term
palpebrae
Definition
eyelids
Term
Conjuctiva
Definition
mucous membrane that covers inner surface of eyelids and surface of the eye
Term
Lens
Definition

held in place by suspensory ligaments attached to ciliary muscle/body, posterior to conrnea and iris, forms anterior boundary of viteous chambers

parasympathetic control

Term
Iris
Definition

under control of ANS

parasympathetic constriction

sympathetic dilation

Term
Optic disc
Definition
axons from ganglion axons enter optic nerve 2nd cranial nerve to brain
Term
Fovea
Definition
in center of macula lutea area of sharpest vision- all cones
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