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Ventricles, Meninges, CSF, and Blood Vessels
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Dural Septa Layers
Arachnoid granulations
Where CSF flows
Arachnoid mater
Spider webs
Pia Mater
Weak mother directly adhered to the brain
Subarachnoid space (actual space)
Space between the arachnoid and pia mater
CSF and blood vessels flows through here around the brain
Epidural Space (potential space)
Between the skull and dura mater
Blood or fluid can build up here
Subdural space (potential space)
Between the dura and arachnoid mater (usually no space here)
Extradural Hemorrage
Bleeding in extradural hematoma
Usually caused by tearing of an artery
Subdural Hemorrhage
Bleeding in subdural space
Tear in a vein
Subarachnoid Hemorrhage
Mixing CSF with blood
Lateral Ventricles
-interventricular foramen (hole)->
Third Ventricle
-Cerebral Aqueduct->
Fourth ventricle ->
Subarachnoid space (via median & lateral apertures)
CSF goes back and fourth between the Central canal of the spinal cord
Lateral Ventricles
Telencephalon
Third Ventricle
Diencephalon
Cerebral Aqueduct
Mesencephalon
Fourth Ventricle
Metencephalon and myelencephalon
What do all ventircles contain?
Choroid plexus, a structure that continually produces cerebrospinal fluid (CSF)
CSF
Specialized fluid from filtered blood
Following functions:
Shock absorber, helps in transporting nutrients and removal of waste, helps maintain the proper ion balance in neural tissue
Hydrocephalus
Caused by obstruction of circulation of CSF
Leads to accumulation of fluid
Compresses the brain
Two major pairs of arteries supply the brain:
Vertebral arteries
Internal carotid arteries
Vertebral arteries
Branches off the subclavian arteries
Travels through transverse foramina & enters skull through foramen magnum
Its branches are referred to as the
posterior circulation of the brain
Internal Carotid Arteries
Branches off the common carotid arteries (either from the brachiocephelic trunk or the aortic arch depending on the side)
Enters the skull through carotid canal and then through the internal opening of foramen lacerum (filled with cartilage)
Its branches are referred to as the anterior circulation of the brain
Internal Carotid Artery
Its branches are referred to as the anterior circulation of the brain
Anterior Cerebral Artery
Terminal branch of internal carotid a
Enters the longitudinal fissure
Supplies most of the medial and superior surfaces of the cerebral hemispheres (specifically on the frontal and parietal lobes)
Green is the Anterior Cerebral A
Middle Cerebral Artery
Terminal branch of internal carotid A
Passes between the temporal and frontal lobes to reach the lateral part of the cerebral hemispheres
Supplies lateral surface of cerebral hemispheres
Purple is middle cerebral artery
Blood supply to the cerebral cortex
Medial and superior aspect supplied by anterior cerebral A
Lateral aspect supplied by middle cerebral A
Posterior Cerebral A
Terminal branch of basilar a
Supplies inferior surface of the cerebral hemispheres (specifically the inferior portion of temporal lobes) and all of the occipital lobes
Yellow is Posterior Cerebral A
Innervation
Primary Somatosensory Area
: Anterior/Middle Cerebral A
Primary Visual Area
: Posterior Cerebral A
Primary Motor Area
: Anterior Cerebral A
Broca's Speech Area
: Middle Cerebral A
Prefrontal Cortex
: Anterior Cerebral A
Primary Auditory Area
: Middle Cerebral A
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Author
Zaqxz
ID
340941
Card Set
Ventricles, Meninges, CSF, and Blood Vessels
Description
alksdjf
Updated
2018-06-24T01:00:28Z
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