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6. which is true of the ventricles of the brain

  • most CSF drains into the spinal cord not the cavity of the brain
  • the intraventricular foramen communicates the cerebral aqauduct with the fourth ventricle
  • The fourth ventricle is connected to the subarachnoid space through paired lateral and medial apertures
  • CSF is not produced in ventricles
  • the lateral ventricles are made up of three horns posterior inferior superior

7. in regards to the cranial fossae which is false

  • anterior cranial fossa- frontal lobe
  • base of skull divided into four fossae
  • sella turcica- pituarty fossa
  • posterior cranial fossa- occiptal lobe
  • middle cranial fossa- temporal lobe

8. cranial fossa foramina which is true

  • The foramen magnum is part of the parietal bone
  • the optic canal for CN II is situated in the frontal bone
  • CN I passes through the cribiform plate in the middle cranial fossa
  • the jugular foramen has CN IX,X,XI pass through it
  • hypoglossal canal has CN VII pass through it

9. The middle meningeal vein passes behind the pterion plate

  • False
  • True

10. in regards to meninges which is false?

  • the pia is the innermost layer
  • continous with the jugular foramen to the spinal cord
  • the dura is the outermost layer
  • consist of three layers
  • venous sinuses run between the dural layers

11. which is true in regards to venous sinuses

  • superior saggital sinus runs along the inferior border of the falx cerbi
  • venous sinuses are where the endosteum and the dura seperate to accomodate venous channels
  • drain into the external jugular veins
  • sinuses run between the layers of the pia
  • transverse sinus not paired

12. which of the following is false of the cavernous sinus

  • can be a route for extracranial infections to spread into intracranial areas
  • paired sinus in the lateral aspect of the sphenoid bone
  • the internal carotid artery passes through the cavernous sinus
  • abducent nerve passes laterally to it
  • the cavernous sinus recieves blood from all venous sinuses and drains into the internal jugular

13. which is false in regards to the middle meningeal artery

  • divides into anterior and posterior branches
  • branch of the maxillary artery which is a branch from the internal carotid
  • supplies the greatest part of the dura
  • runs directly behind the pterion plate
  • easily tamponaded

14. which is false of the vertebral arteries

  • arises from the subclavian artery
  • join to form the basilar artery
  • travels posterior to the transverse processes
  • hooks around the top of the atlas
  • gives rise to the anterior and posterior spinal arteries

15. the cerebellums arterial supply is from the inferior and superior cerebellar arteries

  • True
  • False

16. which of the following is not a branch or part of the circle of willis

  • superior cerebral artery
  • posterior cerebral artery
  • anterior communicating artery
  • middle cerebral artery
  • posterior communicating artery

17. the internal carotids that are part of the circle of willis arise left from the brachiocephalic trunk and right from the aortic arch

  • False
  • True

18. in regards to arterial territories which is false

  • posterior cerbrel occipital cortex
  • the anterior cerebeller artery supplies the superior part of the cerebellum
  • anterior cerebral artery supplies medial surface of cerebral hemisphere
  • middle cerebral most of the lateral aspect of the cortex
  • the middle cerebral artery supply the internal capsule and the basal ganglia

19. vertebrobasilar insufficency which is true

  • directly effects the anterior and posterior cerebral arteries
  • when blood supply to the anterior part of the neck is reduced
  • can be a result of flexion of the neck
  • can result in TIA or stroke
  • sometimes called nurses neck

20. pontine arteries arise from the basilar artery

  • True
  • False