the three meninges: pia, arachnoid & dura, the dura is most superficial.
The thick, tough
dura has 2 layers: an outer periosteal
layer & an inner meningeal layer.
At defined locations, the dural layers
split to form sinuses. Sinuses collect
venous blood that will flow into the
Internal Jugular Vein. Sinuses include:
Sigmoid, Transverse, and Straight
Sinus & the Sinus Confluens. Other
sinuses draining blood from other brain
areas are not shown here.
The dura folds back on itself to
form three reflections. The Falx
Cerebri separates the two hemispheres, the Tentorium Cerebelli separates the posterior
fossa brainstem & cerebellum
from the supratentorial brain, and the tiny Falx Cerebelli partially separates the
two cerebellar hemispheres.