Meninges And Arteries Flashcards
Dural folds
Large septa (falx cerebri, tentorium cerebelli)
What lies between the two layers of dura mater
Dural venous sinuses (large valveless vessels)
Which meningeal layer is avascular
Arachnoid
Which meningeal layer is highly vascular
Pia
Ruptured meningeal artery, lemon shaped and usually caused by skull bone fracture
Epidural Hemorrage
What happens during a epidural hemorrhage
Periosteal dura separates from skull
Increase pressure compresses brain
Dangerous within hours
Rupture of subdural veins, crescent-shaped subdural masses develop slowly and manifest hours-to-weeks
Subdural Hemorrhage
Rupture of vessels between arachnoid and pia from trauma or spontaneously, tree-like appearance
Subarachnoid Hemorrhage
Rupture of small penetrating branches of major arteries, ventricles fill with blood
Ex: lenticulostriate arteries which branch from middle cerebral artery
Intracerebral Hemorrhage
Which arteries anastomose at Basal Diencephalon to form Circle of Willis
Vertebral and internal carotid
What artery arises from the brachiocephalic trunk
Right common carotid
What artery arises from the aortic arch
Left common carotid
Common carotids bifurcate yielding which arteries
External and internal carotid arteries
What arteries are the first branches of the subclavian arteries
Vertebral arteries
Where do the vertebral arteries enter the skull
Foramen magnum
The circle of Willis surround what structures
Optic chiasm, optic tract, mammillary bodies, and ventral hypothalamus
What arteries supply the basal ganglia and anterior limb of internal capsule
Striate branches of anterior cerebral artery
Which arteries supply the basal ganglia and internal capsule
Lenticulostriate branches of middle cerebral artery
Which arteries are vulnerable to rupture and cause intracerebral (periventricular) Hemorrhage
Lenticulostriate arteries
Which artery dominates the lateral cerebral surface
Middle cerebral
What happens if the left middle cerebral artery is occluded
Language deficits
What artery feeds the anteromedial cerebral surface
Anterior cerebral artery
What artery feeds the posteromedial cerebral surface
Posterior cerebral artery
