Chapter 10: Nervous System Flashcards
neurons (1)
nerve cells which carry electrical messages
acetylcholine
chemical which activates the cell membranes of neurons
nervous impulses
travel along the neurons
central nervous system
Brain and spinal cord
peripheral nervous system (1)
cranial nerves (12 pairs), spinal nerves (31 pairs), plexuses and peripheral nerves
plexus
large network of nerves in the peripheral nervous system
spinal and cranial nerves
contain sensory receptors (afferent) and motore receptors (efferent)
autonomic nervous system
nerve fibers that carry impulses way from the CNS to glands, heart, blood vessels, involuntary muscles.
sympathetic
stimulates body in times of stress/crisis
parasympathetic
slows down everything, except bowel and bladder
peripheral nervous system (2)
+ cranial nerves (12 pairs)
+ spinal nerves (31 pairs)
+ autonomic nerves (parasympathetic and sympathetic nerves)
neurons (2)
stimulus beings in the dendrite and travel in one direction from neuron to neuron
ganglion
small collection of nerve cells
axon
carries impulses away from the cell body
myelin sheath
fatty tissue that insulates axons and speeds transmission of impulse
synapse
space where nerve impulse jumps from one neuron to another
neurotransmitter
chemical substance \+ acetylcholine \+ norepinephrine \+ epinephrine \+ dopamine \+ serotonin \+ endorphins
glial cells
the supportive framework and help ward off infection
astroglial
blood brain barrier - protect nerve cells from potentially harmful substances
cerebrum
largest part, the thinking part of the brain
ventricles
containing watery fluid that flows throughout the Braine and around spinal cord
thalamus
relay station
hypothalamus
\+ body temperature \+ sleep \+ appetite \+ emotions \+controls pituitary gland
cerebellum
coordination of voluntary movement and balance
pons and midbrain
connection of nerve and nerve fiber pathways
medulla oblongata
nerve fibers cross over left to right and right to left
gray matter and white matter (of the spinal cord)
carry messages to and from the brain
dura mater (of the meninges)
outermost layer of the meninges
arachnoid (of the meninges)
membrane layer of the meninges
pia mater (of the meninges)
innermost layer of the meninges
cerebell/o
cerebellum
cerebr/o
cerebrum
dur/o
dura
encephal/o
brain
gli/o
glial cells
lept/o
thin, slender
mening/o
mening/i
meninges, membranes
my/o
muscle
myel/o
spinal cord, bone marrow
neur/o
nerve
pont/o
pons
radicul/o
nerve root
thalam/o
thalamus
thec/o
sheath (refers to the meninges)
vag/o
vagus nerve
alges/o
-algesia
sensitivity to pain
-algia
pain
caus/o
burning
comat/o
deep sleep (coma)
esthesi/o
-esthesia
feeling, nervous sensation
kines/o
kinesi/o
movement
-kinesia
kinesis
movement
-kinetic
movement
-lepsy
seizure
lex/o
word, phrase
-paresis
weakness
-phasia
speech
-plegia
paralysis
poli/o
gray matter
-praxia
action
-sthenia
strength
syncop/o
cut off, cut short
tax/o
order, coordination
subdural
below the dura
epidural
between skull and dura
intracerebral
bleeding directly into brain tissue
hydrocephalus (congenital disorders)
abnormal accumulation of CSF (fluid) in the brain
+ can also occur in adults as a result of tumors and infections
spina bifida
no herniation
meningocele
hernia of meninges
myelomeningocele
hernia of meninges and spinal cord