Medical Terminology - Module 7 Flashcards
(105 cards)
CNS
central nervous system; brain and spinal cord
PNS
peripheral nervous system; all other nervous tissue
Somatic nervous system
controls skeletal muscles
ANS
automatic nervous system or visceral nervous system; controls smooth muscle
neurons
nerve cells
neurolgia
Helper cells that support and protect the neurons
myelin
white matter insulating and protecting axons
axon
carries impulses away from cell body
dendrite
carries impulses to the cell body
unmyelinated
gray matter, lacking myelin sheath
sensory/afferent neuron
transmits impulses to the CNS
motor/efferent neurons
transmits impulses away from CNS
ganglion
collection of nerve cell bodies outside the CNS
cerebrum
Area of the brain responsible for all voluntary activities of the body; large upper portion
Diencephalon
thalamus, hypothalamus, and pituitary gland; between cerebrum and brainstem
cerebellum
A large structure of the hindbrain that controls fine motor skills; posterior section
sulci and gyri
the grooves; the raised areas
dura mater
outermost, thick layer covering the brain
arachnoid mater
thin, web-like middle layer
pia mater
thin, delicate inner membrane
part of ANS
sympathetic and parasympathetic
sympathetic nervous system
flight-or-flight response; adrenal gland activation
parasympathetic nervous system
returns body back to rest and deals with maintenance activities like digestion
CSF
cerebrospinal fluid