1 - Zil - Meninges + Venous Sinuses Flashcards
Hematoma
Abnormal mass of blood outside blood vessel
Arterial Supply to Head
Common Carotid Arteries
Verterbral Artery
Carotid Pulse
Sternocleidomastoid Muscle
Vertebral Level C4
Lateral to Throid Cartilage
Venous Drainage From Head
Right/Left Internal Jugular Vein
Carotid Siphon
C-shaped turn of Internal Carotid Artery
Passes through cavernous sinus
Entrance of major arteries of skull?
Internal Carotid - enters skull via Carotid Canal and Foramen Lacerum
Vertebral Artery - enters skull via Foramen Magnum
Dura Mater
Tough connective tissue layer, composed of two layers
- Inner Membrane Layer (true dura)
- Outer Endosteal Layer - periosteum on inner side of calvarium
- - -
Layers fused in most places, separate to form Dural Reflections
Extra Space in skull?
Normally none, as dura is fused to bone
Unline spinal cord, there is NO epidural space
Dural Reflection
Two folded layers of Inner Membrane (true dura)
Contain venous sinuses
Falx Cerebri
Sickle shaped dural reflection between cerebral hemispheres
Attached:
Ant. to Crista Galli of Ethmoid
Post. Blends into Tentorium Cerebelli
Falx Cerebelli
Smaller barrier between cerebellar hemispheres along posterior wall of Post. Cranial Fossa
Tentorium Cerebelli
Forms roof of Posterior Cranial Fossa
Like a Tent
Has notch for pass of brainstem
Diaphragma Sella
Fold over sella turcica
Opening for stalk of pituitary
Tentorial Notch
Opening for brainstem
Arachnoid layer
Attached to inner side of dura (potential space = Subdural Space)