Unit 3 Flashcards
myelin sheath
conducts nerve impulses quickly
protective membrane that surrounds nerve fibers
acetylcholine
released from sympathetic and parasympathetic
microglia
removes debris in central nervous system
synapse
region between adjacent neurons
interneurons
transmit impulses from neuron to neuron
reticular activating system
helps maintain wakefulness
afferent pathway
ascending pathways
sensory impulses carried toward central nervous system
efferent
descending pathways
away from central nervous system
cranial nerve VII
Smiling
somatic
voluntary control
cerebellum
balance
serotonin
mood, anxiety and sleep
spatial summation
combined effect of impulses into a single neuron
oligodendroglia
deposit myelin sheaths within the central nervous system
dermatomes
area of skin that receives nerve innervation from specific spinal nerve
autonomic
sympathetic and parasympathetic
gray matter
contains cell bodies of neurons
Normal CSF
0 red blood cells
three major divisions of the brain
forebrain
midbrain
hindbrain
blood brain barrier
sselectively inhibits substances from entering he brain
nissl substance
protein synthesis
basal ganglia system
stabilizes motor movements
changes in older adult
increased permeability of blood brain barrier
white matter
myelinated nerve fibers
posterior column
fine touch sensation
two point discrimination
meninges surrounding brain
dura mater
arachnoid
peripheral nervous system
cranial nerves
spinal nerves
somatic nervous system
parasympathetic activity
reduced heart rate
chord plexus
cerebrospinal fluid
axon
away from neuron
broca
speech
small area
huntington disease
affects basal ganglia
