Into to nervous system Flashcards
gray matter
collection of neuron cell bodies
nucelus
cluster of neuron cell bodies morphologically distinct from other neurons
lamina
layer or band of gray matter
cortex
gray matter located on the outer surface
white matter
aggregation of neuronal processes/ axons/ fibers
tract
collection of neuronal fibers/axons that are anatomically of functionally distinct
fasciculus
bundle of axons
lemniscus
ribbons or band of axons
funiculus
column or cord of white matter
ascending fibers/axons
travel rostrally
descending fibers/axons
travel caudally
divisions of CNS
spinal cord
brainstem
cerebellum
cerebrum
brainstem
connects spinal cord to cerebrum and cerebellum
brainstem/bulb
includes gray matter (nuclei), white matter includes ascending and descending tracts of fibers
3 parts of brain stem/bulb
medulla (oblongata)
pons
midbrain