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Brain Components (made up of (groups of (neurons (grouped in clusters…
Brain Components
made up of
groups of
neurons
grouped
in clusters
aka nucleus
mostly in
midbrain
hindbrain
arranged in a sheet
(layer or lamina)
aka area
mostly in
cerebral cortex
cerebellar cortex
bundles of
axons
(nerve fibers)
names if elongated
tract
usually described
with their beginning and end
corticospinal tract
starts in the cerebral cortex
and ends in the spinal cord
internal capsule
is the huge tract that connects
the cerebrum to the brainstem and thalamus
lemniscus
large tracts that are
oval-shaped in cross section
when crossing the midline
they are called
symmetrical
commissures
corpus callosum
the largest commissures
joins the two cerebral hemispheres
asymmetrical
decussation
(or chiasm,
from greek
letter Χ ("chi") )
e.g. optic chiasm