Brain Flashcards
Blood supply of the optic nerve
Opthalmic artery
Blood supply of the optic chiasm
Branches from
Internal carotid
Posterior and anterior communicating
Anterior cerebral
Blood supply to optic tract
MCA
Blood supply of lateral geniculate nucleus
Anterior chroidal branches of MCA
Thalamogeniculate branches of PCA
Blood supply of optic radiations
MCA
Blood supply of calcarine sulcus
PCA (some supply from MCA)
Which arteries do the vertebral arteries arise from?
Subclacian arteries
Which arteries does the internal carotid give rise to distal to the cavernous sinus?
Opthalmic
Posterior communicating
Anterior chorodial
Anterior cerebral
Middle cerebral
What does the anterior choroidal artery supply?
supplies structures in the brain important for motor control and vision.
Branches of the vertebral arteries within the cranial vault?
Meningeal branch
Anterior and posterior spinal arteries
Posterior inferior cerebellar artery
Two vertebral arteries converge to form what?
Basilar artery
How does the basilar artery terminate?
Bifurcating into the PCAs
Anterior cerebral arteries supply?
Anteromedial portion of the cerebrum
MCAs supply?
The majority of the lateral part of the brain
PCA’s supply?
Both the medial and lateral parts of the posterior cerebrum.
4 main causes of CVA?
Thrombosis – obstruction of a blood vessel by a locally forming clot.
Embolism – obstruction of a blood vessel by an embolus formed elsewhere.
Hypoperfusion – lack of blood supply to the brain, due to systemically low blood pressure (e.g shock).
Haemorrhage – an accumulation of blood within the cranial cavity.
3 types of white matter tracts
Commissural
Association
Projection
Commissural fibres role
Interconnect the corresponding regions of the two cerebral hemisphere
Association fibres role
Connect the various cortical regions WITHIN a cerebral hemisphere
Projection fibres role
Connect the cerebral cortex with the lower part of the brain
Basal nuclei role
Supraspinal control centre for skeletal muscle
