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Cerebral Blood
Cerebral Hemispheres and Vascular Supply
| Question | Answer |
|---|---|
| Main functional areas of the Cerebral Cortex = ? | * Hand/Face are on the Lateral convexities.... * Legs are on the inter-hemispheric fissures |
| Where does Broca's area reside ? | * In the DOMINANT, usu LEFT hemisphere, lies in the inferior frontal gyrus... * Just anterior to the articulatory areas of the primary motor complexes |
| Where does Wernicke's area reside ? | * lies in the superior temporal gyrus, adjacent to the primary auditory cortex |
| Association Cortex = ? | * in the NONdominant (usu Right hemisphere, esp. in the parietal lobe).... * it is important fr attention to contralateral body and space |
| Visual Fields = ? | * Primary Visual cortex for the contralateral visual hemifield lies along the occipital lobe fissure.... * Optic Radiations = carry visual info from thalamus to visual cortex, pass under the parietal and temporal cortex |
| Terminal branches of the internal carotid arteries ? | * ACA (Ant. Cerebral Artery) and MCA (Middle Cerebral Artery) |
| Provides Cirulation to the Anterior and Posterior portions of the brain ? | * Anterior Circ. = by bilaterally paired internal carotid arteries..... * Post. Circ. = by bilateral vertebral arteries |
| Where these meet ? | * Where these ant. and post. circulations meet = CIRCLE of Willis |
| The Basilar Arteries are made by the convergence of the vertebral arteries. What then comes off of the Basilar Artery ? | * PCA (posterior Cerebral Artery) |
| Vascular territories for the ACA = ? | * travels between the interhemisphereic fissures as it sweeps back across the corpus callosum...* Gives off the pericallosal and callosomarginal arteries...* supplies most of the ant-medial surface, from frontal to ant. parietal lobes, |
| ACA continued... | * including the medial sensorimotor cortex |
| MCA = ? | * turns laterally to enter the depths of the sylvian fissure, where it bifurcates in to a superior and inferior division. |
| PCA = ? | * sends branches to the inferior and medial temporal lobes and over the medial occipital cortex |
| Superior Division of the MCA supplies = ? | * the cortex above the Sylvian Fissure, which includes the frontal lobe |
| Inferior Division of the MCA supplies = ? | * the cortex below the Sylvian Fissure, including the lateral temporal lobe and some of the parietal lobe |
| ACA in simple words ? | * supplies most of the frontal and parietal lobes medially and superiorly |
| MCA ? | * laterally, supplies some of the parieta and temporal lobes |
| PCA ? | * Supplies inferior/medial and inferior lateral temporal lobes.... * Also supplies most of the occipital lobes |
| Deficits in Right ACA = ? | * LEFT leg weakness and sensory loss..... * behavioral abnormalities due to frontal lobe affected.... * Can see left hemineglect or even left hemiplegia |
| Left ACA = ? | * Same as Right ACA, except everything is on the RIGHT side |
| Deficits in Right PCA = ? | * Left homonymous hemianopia, and can see left hemisensory and hemiparesis loss also |
| Left PCA = ? | * Right homonymous hemianopia, Alexia, can see Aphasia, and Right hemisensory and hemiparesis loss |
| MCA RIGHT SUPERIOR Division Deficit = ? | * LEFT arm/face weakness, Left hemineglect, and may see some left face/arm sensory loss |
| MCA LEFT Superior Division = ? | * RIGHT arm/face weakness, RIGHT hemineglect, and may see some RIGHT face/arm sensory loss.... * Also Broca's Aphasia |
| MCA RIGHT INFERIOR Division Deficit = ? | * Major Left Hemineglect, Left visual field deficit, have normal motor on the LEFT but just choose not to use LEFT side.... * often a RIGHT Gaze is present |
| MCA LEFT INFERIOR Division Deficit = ? | * Wernicke's Aphasia.... * Right visual side defect... * Right face'arm sensory loss.... * Right side weakness and motor findings are absent |
| MCA RIGHT STEM Deficit = ? | * Combo of Right DEEP MCA + left hemiplegia, hemianesthesai, homonymous hemianopia, and left hemineglect.... * usu a right gaze bc a deficit in the area that drives eyes to the left |
| MCA LEFT Stem Deficit = ? | * Combo of LEFT DEEP MCA + Right Hemiplegia, hemianesthesia, homonymous hemianopia, and GLOBAL Aphasia. ... * See a LEFT gaze preference |
| MCA RIGHT Deep Territory Deficit = ? | * Left Pure Motor hemiparesis... * if larger infarcts, can see left hemineglect as well |
| MCA LEFT Deep Territory Deficit = ? | * Right Pure Motor hemiparesis... * if larger infarcts, can see Aphasia as well |
| What are the significance of watershed zones ? | * don't need an infarct to cause issues, just need a drop in BP... * Are areas in between two arteries that are supplied by smaller branches... * Can have weakness, aphasia, etc. depending on what watershed areas are deficient |
| Venous drainage of the cerebral hemispheres = ? | * has both superficial and deep veins.... * Superficial Veins drain in to the Superior Sagittal Sinus and the Cavernous Sinus.... * Deep Veins Drain in to the Great Vein of Galen... * Both eventually drain in to the Int. Jugular Vein |
| Sagittal sinus thrombosis = ? | * usu due to a hypercoag. issues.... * high frequency in postpartum pregnant ppl, and causes an increase in intracranial pressure.. * See seizures, headaches, different lvls of consciousness |
| Simplified issues with ACA deficit = ? | * contralateral leg, more than arm/face weakness |
| PCA = ? | * contralateral homonymous hemianopia |
| MCA = ? | * visual gaze towards the side of the lesion |
Created by:
thamrick800
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