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