CH 14 The Brain

Rostral

toward the forehead or nose

Caudal

toward the tail or spinal cord

3 major portions of the brain

forebrain, cerebellum, brainstem

most prominent part of the forebrain

cerebrum

the cerebrum is divided into two _

hemispheres

gyri

thick folds in the brain

sulci

shallow grooves that separate gyri

logitudinal cerebral fissure

deep groove separating the left and right hemisphere

corpus callosum

thick bundle of nerve fibers that connect the two hemispheres

dicephalon

portion of the brain between the midbrain and corpus callosum containing thalamus, hypothalamus, epithalamus

second largest part of the brain

cerebellum

brainstem components

pons, midbrain, medulla oblongata

the brainstem ends at the

foramen magnum

brain cortex

surface layer of gray matter over the cerebrum and cerebellum

nucleus/nucli

cluster of neurons dedicated to a specific funtion

in embryonic development the nervous system develops from the _

ectoderm