Chap 13 CNS

meninges
- inner covering of membranes
- three layers: dura, arachnoid, pia mater
falx cerebri

partition bw/ two cerebral hemishperes; extends from roof of cranial cavity
falx cerebelli

separates two 1/2s or hemispheres of cerebellum
tentorium cerebelli

separates cerebeullum from cerebrum; forms tent like covering over cerebellum
epidural space
- immediatly outside dura matter but inside covering of spinal cord
- cushion of fat and other connective tissues
- no epidural space present in brain for periosteum continuous on inside face of cranial bones
subdural space
- b/w dura matter and arachnoid matter
- small amt of lubricating serous fluid
subarachnoid space
- under arachnoid and outside pia mattter
- has significant amt of cerebrospinal fluid
filum terminale
- formation of pia mater
- third segement of sacrum blends w/dura mater to form cord that disappers in periosteum of coccyx
cerebrospinal fluid (CSF)
- protective covering around organs and w/in them
- resevior of cirulating fluid that brain monitors for changes in internal enviorment
ventricles

four large fluid filled spaces containing CSF
chorioid plexuses
- networks of capillaries that project from pia matter into lat ventricles and into roof of third and fourth ventricles
- covered w/ependymal cells that release CSF into spaces

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Chap 13 CNS

Description

CNS

Updated

2010-04-09T18:12:22Z

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