|Diagrammatic transverse section of the medulla spinalis and its membranes. (At border, dura mater is black line, arachnoid mater is blue line, and pia mater is red line.)|
|The medulla spinalis and its membranes.|
|Gray's||subject #193 878|
The thin, mesh-like pia mater closely envelops the entire surface of the brain, running down into the fissures of the cortex. It joins with the ependyma which lines the ventricles to form choroid plexuses that produce cerebrospinal fluid.
The pia mater is a neural crest derivative.
Anatomy: meninges of the brain and medulla spinalis
|Layers||Dura mater (Falx cerebri, Tentorium cerebelli, Falx cerebelli, Diaphragma sellae)|
|Spaces||Epidural space - Subdural space - Subarachnoid space (Cerebrospinal fluid)|
|Subarachnoid cisterns||Cisterna magna - Pontine cistern - Interpeduncular cistern - Chiasmatic - Lateral cerebral fossa - Of great cerebral vein|
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