Ventricles & Meninges

imissyou419's version from 2016-12-09 01:56

Section 1

Question Answer
Dura materthickest, outermost; periosteal layer, meningeal layer
Arachnoid materthin, avascular, invaginates into longitudinal fissure but not sulci
Pia matervascular, invaginates into sulci
True spacesSubarachnoid space (filled with CSF, location of cerebral blood vessels)
Potential spacesEpidural space, subdural space
Lumbar cistern (for lumbar puncture)enlargement of subarachnoid space, contains cauda equinoa, filum terminale, and CSF
Falx cerebridural fold b/w 2 cerebral hemispheres; superior fixed margin, inferior free margin
Falx cerebellib/w 2 cerebellar hemispheres; posterior fixed margin, anterior free margin
Tentorium cerebellib/w cerebrum & cerebellum; free margin forms tentorial notch
Diaphgram Sellaecentral opening for infundibulum (pituitary stalk)
Dural venous sinusesb/w periosteal and meningeal dura; receives blood from emissary, diploic, cerebral veins, receives CSF from subarachnoid space through arachnoid granulations, returns blood & CSF to systemic circulation
Flow of CSF into systemic circulationSuperior sagittal sinus, inferior sagittal sinus, straight sinus, occipital sinus, confluence of sinuses, traverse sinus, sigmoid sinus, cavernous sinus
The confluence of sinus receives blood/CSF fromsuperior sagittal sinus, straight sinus, occipital sinus
right transverse sinus receives blood/CSF fromsuperior sagittal sinus
left transverse sinus receives blood/CSF fromstraight sinus
inferior sagittal sinus drains into thestraight sinus

Section 2

Question Answer
Ventriclescontain choroid plexus (produce CSF & found in all ventricles, composed of pia mater and fenestrated capillaries, covered in ependymal cells, CSF secretion regulated by ANS), CSF
CSF locationcirculates through ventricles, subarachnoid space, central canal of spinal cord
CSF functionregulate support/protection, regulate chemical environment, channel for chemical communication
Flow of CSFLateral ventricles (anterior horn, body, atrium, posterior horn, inferior horn), third ventricle (associated with diencephalon) via interventricular foramen, and then the fourth ventricle (associated w/ pons, medulla & cerebellum) via cerebral aqueduct, then SAS via median and lateral aperatures, then central canal

Section 3

Question Answer
Epidural hematomaaccumulation of blood b/w periosteal dura mater and skull; caused by rupture of middle meningeal artery; symptoms are loss of consciousness, lucid interval, drowsiness, coma
Subdural hematomaaccumulation of blood between dura and arachnoid mater; caused by tears of cerebral veins, symptoms are increased headache and confusion
Hydrocephalusexcess CSF leading to dilation of cerebral ventricular system; caused by overproduction, impaired absorption, or obstruction of CSF flow; symptoms are head enlargement

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