Module 10 Flashcards
What causes lesions (ie stroke)?
Impaired blood flow
What are 3 ways the blood supply is interrupted?
Motor/sensory disturbance
Cognitive disturbance
Neural tissue death
Where does venous blood drain into?
Dural sinuses
Where does the brain get its energy?
Glucose metabolism
What does neuronal activity depend on?
Second by second delivery of oxygen from blood
That’s why being brain dead for even a second is harmful
How much blood does the brain get from the blood pumped to the heart?
How much oxygen is consumed from the oxygen used by the body?
1/5 of blood
20% of oxygen
How much blood flows through the brain each minute?
0.8 l
Name the 2 arterial system
Internal carotid
Vertebral basilar
What is the function of the internal carotid arterial tree?
Supplies blood to the anterior brain
How does the internal carotid arterial tree (ICAT) enter the cranium?
Through the temporal bone
Into middle fossa
Where does the ICA (internal carotid arterial) arise from?
Common carotid (CCA)
What are the 2 main branches the ICA divide into?
Anterior cerebral artery (ACA)
Middle cerebral artery (MCA)
What areas does the ACA supply blood!
Oribital/medial frontal lobe
Medial parietal lobe
ALL areas of corpus callosum EXCEPT splenium
Name the artery that connects the anterior carotid artery
Anterior communication artery (AC)
Where is the middle cerebral artery?
Between the temporal lobe and the insula
What areas doss the MCA (middle cerebral artery) supply?
Frontal branch
parietal branch
Temporal branch
What are the areas of the frontal branch that the MCA supplies?
Broca’s area
Motor association cortex
Primary motor cortex
What are the areas of the parietal branch that the MCA supplies?
Somasensory Cortex
Supramarginal gyrus
Angular gyrus
What are the areas of the temporal branch that the MCA supplies?
Heschl’s gyrus
Wernickes area
What happens if there damage to the MCA?
Contealateral hemiparesis Impaired sensory systems Aphasia Apraxia Reading/writing deficits
What is the posterior communication artery?
Connects posterior cerebral artery (PCA, main branch of basilar artery)
Which area does the vertebral basilar arterial tree service?
The posterior circulation to the brain
what two arteries are included in the basilar vertebral tree?
Vertebral artery
Basilar artery
How does the vertebral artery enter the skull?
Through the foramen magnum
Ascends thru the foramina
