Introduction Flashcards
cerebral cortex, cerebellar cortex and nuclei
gray matter
tracts, fasiculi, lemnisici, commissures, brachii, peduncles
white matter
what white matter is visible grossly?
commissure
nerve cell bodies and neuroglia
gray matter
nerve cell axons and neuroglia
white matter
where are cell bodies in the PNS located
in ganglia
where are axons in the PNS located
nerves and plexuses
where are cell bodies in the CNS located
gray matter:
cerebral cortex
cerebellar cortex
nuclei
where are axons in the CNS located
white matter: tracts fasiculi lemnisci commissures brachii peduncles
butterfly shaped area in center of spinal cord
gray matter
_______ cranial nerves
______ spinal nerves
12 cranial nerves
31 spinal nerves
decussation =
crossing
commissural v. association fiber
The commissural fibers or transverse fibers are coherent white-matter structures that connect the two hemispheres of the brain. In contrast to commissural fibers, association fibers connect regions within the same hemisphere of the brain, and projection fibers connect each region to other parts of the brain or to the spinal cord.
motor cortex controls movement in the ________ side of the body
opposite
the sensory cortex recieves information from the ____________ side of the body
opposite
the cerebellum controls the __________ side of the body
ipsilateral
4 commissures/crossings/decussations
anterior commissure
posterior commissure
olfactory commissure
corpus callosum
bundle of sensory neuron axons
long ascending tract
bundle of motor neuron axons
long descending tract
decussation v. commissural fibers
commissural is a sharing, decussation is a total crossing
produces a deficit ipsilateral or contralateral to the lesion depending on the pathway affected and where it crosses
focal spot lesion
produced by MS are widespread
global lesios
a command to move teh right arm comes from the
left motor cortex
if the right side of the body is paralyzed, look at the —- side of the MRI
left
