Anatomy 5: Space Occupying Lesions Flashcards
what are the layers of the scalp
skin connective tissie aponeurosis loose connective tissue pericranium SCALP
what is the thinnest part of the skull
pterion
what courses deep to the pterion
the middle meningeal artery
what is the name of the tough sheet of dura mater forming a roof over the pituitary fossa
diaphragm sellae
what is the name of the dura mater lying voer the cerebellum
tentorium cerebelli
what sheet of dura mater separated the cerebral hemispheres
falx cerebri
what drains blood from brain to dural venous sinuses
the cerebral veins
where does the sigmoid sinus drain
internal jugular vein (via jugular foramen)
where is the confluence of the sinuses located
in the midline at the internal occipital protuberance
where do the anterior cerebral arteries supply
medial aspect of cerebral hemispher
where do the middle cerebral arteries supplu
the lateral aspect of the cerebral hemispheres
where do the posterior cerebral arteries supply
the posterior aspect of the right cerebral hemisphere
what produces csf
choroid plexux
where is csf reabsorbed
into dural venous sinus via arachnoid granulations
at what level is a lumbar puncture
either L3/4 or L4/5
where does the subarachnoid space end
S2
what connects the third and fourth ventricle
the cerebral aqueduct
where is the central canal continuous with
the fourth ventricle
name the ventricles
two lateral
third
fourth
where is the choroid plexus located
lateral and third ventricles
describe the circulation of csf
choroid plexus-> lateral ventricles- third ventricles- cerebral aqueduct- fourth ventricle, subarachnoid space- dural venous sinus
what connects the third and lateral ventricles
the foraminae of monroe
what is hydrocephalus
excessive production, obstruction or inadequate reabsorption of csf
what three main bleed types can arise in the cranial cavity and what are their possible sources
extradural- middle meningeal artery
subdural- cerebral artery
subararachnoid- circle of willis
