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24 Cards in this Set

  • Front
  • Back
major brain divisions
brain stem
diencephalon
cerebrum
cerebellum
brain stem
medulla oblongata "medulla"
pons
midbrain
diencephalon
thalamus
hypothalamus
epithalamus
subthalamus
cerebrum
highest portion of brain
cerebellum
back of brain
protective coverings:
*cranial bones
*cranial meninges= pia mater, arachnoid layer, dura mater
periosteal layer
outer layer adheres to cranial bones & functions as the periosteum
meningeal layer
continuous w/ the spinal cord meninge or layer
3 major extensions of dura
*falx cerebri- on longutinal fissure
*falx cerebelli- between halves of cerebellum
*tentorim cerebelli- in transverse fissure; between occ. lobe & cerebellum
cerebrospinal fluid (c.s.f.)
fluid like 80-150 mil. has salts, protiens, glucose, urea, lymphocytes, c02 increased stimulates respiratory center.
major functions c.s.f.
delivers nutrients & useful substance; removes wastes thus protecting neurons & neuroglia cells
protection c.s.f.
acts as shock absorber; delivers nutrients & removes wastes
transport system
increases c02 in c.n.f. is a resp. stimulus; moves nutrients/waste
ventricels (brain cavity)
ventricle little cavity they contain c.s.f.
lateral ventricels
lateral cerebral hemispheres; these are not #ed like others
interventricular foramen
(foramen of monroe)
from lateral ventricles to 3rd ventricle
third ventricle
between halves of thalamus; slit- like; surrounds pars intermedia
aqueduct of the midbrain
(cerebral aqueduct or aqueduct of sylvius
connects 3rd to 4th ventricle
fourth ventricle
anterior to cerebellum; post. to pons; lead to two aperatures
median aperture
carries c.s.f. to subarachnoid psace
subarachnoid space
outside of c.n.s. where c.s.f. reabsorbrption hack into blood
central canal of sin. cord
lined by ependymal cells thus c.s.f. possibly produced
lateral aperture
(forman of luschka)
carries c.s.f. to subarachnoid space
CSF formation
from filtration/secreton of capillary blood; ependymal cells cover these capillaries & produce csf by filtration/secretion