lecture exam 2 cont. (nervous system) Flashcards
nervous system
uses chemicals to carry messages
- neurotransmitters
- allows systems to react quickly
- sensory messages go up; motor messages go down
endocrine system
uses chemicals to carry messages
- hormones
- body reacts more slowly to changes
CNS
brain and spinal cord
- central axis of body
- linked to rest of body via PNS
PNS
cranial and spinal nerves
- extend away from central axis outward in periphery
encephalo
brain
meningi
meninges
myelo
spinal cord
neuro
nerve
myelomalacia
necrosis of spinal cord
neuropathy
disease of nerves
gray matter
neuron cell bodies
white matter
myelinated nerve fibers
cerebrum
- longitudinal fissure
- gyri
- sulci
- corpus callosum
- olfactory bulb
diencephalon
- thalamus (relays to cerebrum)
- hypothalamus (bridges nervous and endocrine)
- pituitary (master endocrine gland)
brain stem
- midbrain, pons, medulla oblongata
spinal cord
processing between periphery and brain
meninges
brain and spinal cord
- nutrients, oxygen, and cushioning
- dura mater, arachnoid, pia mater
- control pain and fever
how many cranial nerves (PNS)
12 pairs from brain
- optic, facial, vagus, spinal
- spinal: brachial plexus (radial, median, ulnar), femoral, sciatic)
paralysis (plegia)
loss of impairment of motor function