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- Anatomy & Physiology 2201
- Hill
- Unit 6: Lecture 4: Brain Circulation
Unit 6: Lecture 4: Brain Circulation
Anatomy & Physiology 2201 with Hill at University of Missouri- Columbia
About this deck
By: ashlee fuhrken
Created: 2011-11-02
Size: 36 flashcards
Views: 9
Created: 2011-11-02
Size: 36 flashcards
Views: 9
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meninges of the brain
- dura mater
- periosteal
- meingeal
- arachnoid
- pia
dural fold
- meninge of the brain
- dura folds inward
- partitions the brain
- 2 partitions
- falx cerebri
- tentorium cerebelli
falx cerebri
dural fold
between hemispheres
tentorium cerebelli
dural fold
between cerebrum and cerebellum
dural sinuses veins?
- not true veins
- no smooth muscle
- no valves
dural venous sinuses
- between 2 layers of dura
- filled with CSF and blood
- arachnoid villi
- superior sagittal sinus
- cavernous sinus
- transverse sinus
- sigmoid sinus
arachnoid villi
transport CSF from subarachnoid space into sinuses
superior sagittal sinus
- drains into transverse sinus
- lies in the falx cerebri between the cerebral hemisphers
cavernous sinus dangers
- cavernous sinus thrombosis
- infection can spread from danger triangle
transverse sinus
- drains into the sigmoid sinus
- then becomes the internal jugular vein
- run in shallow grooves on the internal surface of the occipital bone
sigmoid sinus
- s shaped
- becomes internal jugular vein
venous drainage of brain
- cerebral capillaries drain into cerebral veins
- cerebral veins empty into dural venous sinuses
drainage review
- csf drains into sinuses
- from arachnoid villi
- blood also drains into sinuses
- via cerebral veins
- sinuses drain into internal jugular
- true vein
arterial supply to the brain
- vertebral artery
- internal carotid artery
- anastamose at cerebral arterial circle
vertebral artery supplies...
posterior brain
internal carotid artery supplies...
anterior brain
vertebral system
- c6-c1 transver
vertebral-basilar system
- vertebral portion
- basilar
vertebral portion of vertebral-basilar system
- anterior spinal
- brain stem and spinal cord
- posterior inferior cerebellar
- brain stem and cerebellum
basilar portion of vertebral-basilar system
- anterior inferior cerebellar
- brain stem and cerebellum
- superior cerebellar
- brain stem and cerebellum
- posterior cerebral
- B stem,
- diencephalon
- occipital lobes
- primary visual cortex
- medial temporal lobes
- parahippocampal gyrus
internal carotid system
- supplies anterior brain
- ophthalmic
- anterior cerebral
- middle cerebral
ophthalmic artery
supplies the eye
anterior cerebral artery
- frontal and parietal lobes
- medial and superior
- i.e. paracentral lobule cingulate gyrus, corpus callosum
middle cerebral artery
- lateral parts of the temporal and parietal lobes
- insula, precentral and postcentral gyri
external carotid
supplies tissues external to brain and orbit
dura mater
- surrounds the brain
- 2 layers are fused together, except where they separate to enclose the blood filled dural sinuses
- two layer sheet of fibrous connective tissue
- periosteal layer
- attaches to the internal surface of the skull bones
- periosteum
- meningeal layer
- deeper
- forms the true external covering of the brain
- continuous with the dura mater surrounding the spinal cord
arachnoid mater
- over the superior part of the brain
- forms knoblike projections, arachnoid villi
pia mater
- vascularized
- clings tightly to the brain surface
- follows the contours of the gyri, sulci and fissures of the brain's external surface
epidural space
filled with cushioning fat and a network of veins
subdural space
- between the arachnoid mater and the dura mater
- potential space
- thin space
- contains a film of fluid
cavernous sinuses
- border the body of the sphenoid bone laterally
- each has an internal carotid artery running within it
- drains into the transverse sinus and the internal jugular vein
- also communicates with the ophthalmic vein of the orbit
internal jugular vein
- drains almost all of the blood from the brain
- receives blood from some deep veins of the face and neck
vertebral venous plexus
- vertebral vein descending through the transverse foramina of vertebrae C1-C6
- originates inferior to the occipital condyle
posterior communicating arteries
- connect the posterior cerebral arteries to the middle cerebral arteries anteriorly
- two
cerebral arterial circle
two posterior communicating arteries and the single anterior communicating artery complete the formation of the arterial anastomosis(cerebral arterial circle)
anterior cerebral artery
anastomoses with its partner on the opposite side through a short anterior communicating artery and supplies the medial and superior surfaces of the frontal and parietal lobes
About this deck
By: ashlee fuhrken
Created: 2011-11-02
Size: 36 flashcards
Views: 9
Created: 2011-11-02
Size: 36 flashcards
Views: 9
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have used this website for three exams, and I see a huge difference in my test results.”
Naj
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