FINALS- Meninges Flashcards
Meningeal layers of the brain
Dura
Arachnoid
Pia
Covers the brain and the spinal cord
Meninges
2 layers of dura mater
Endosteal or periosteal
Meningeal or dura mater proper
Periosteum covering the inner surface of the skull bones does not extend through the foramen magnum
Endosteal layer
Dense strong fibrous membrane covering the brain continuous through the foramen magnum w the dura mater of spinal cord
Meningeal layer
4 septa or foldings of dura mater
Falx cerebri
Falx cerebelli
Tentorium cerebelli
Diaphragma sellae
Divides the cranial cavity into freely communicating spaces lodging the subdivisions of the brain
4 septa
Restricts the rotary displacement of the brain
4 foldings or septa
Sickle shaped fold bet 2 cerebral hemispheres
Falx cerebri
Falx cerebri is attached in front to the (2)
Internal frontal crest
Crista galli
Runs in the upper fixed margin of falx cerebri
Superior to falx cerebri
Sup sagittal sinus
Runs in the lower concave free margin of falx cerebri
Inferior sagittal sinus
Runs bet falx cerebri and tentorium cerebelli
Straight sinus
Crescent shaped fold of dura mater that roofs over the posterior cranial fossa
Tentorium cerebelli
Fold bet cerebellum and cerebrum
T. Cerebelli
Covers the upper surface of the cerebellum and supports the occipital lobes of the cerebral hemispheres
T. Cerebelli
Gap or space that allows formation and passage of the brainstem
Tentorial notch
Tentorial notch produces 2 borders
Inner free border
Outer attached or fixed border
Small, sickle shape fold in the dura mater
Attached to the internal occ crest and projects forward bet 2 cerebellar hemispheres
Falx cerebelli
The post fixed margin of falx cerebelli contains what sinus
Occ sinus
Small, CIRCULAR fold of dura mater
Diaphragma sellae