Brain Vasculature
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| Explain the key relationship of CN III to the arterial supply on the ventral surface of the brain. | Between posterior cerebral and the superior cerebellar artery . | |
| Explain the key relationship of CN V to the arterial supply on the ventral surface of the brain. | Runs under middle cerebral artery. | |
| Explain the key relationship of CN VI to the arterial supply on the ventral surface of the brain. | Between AICA and Labyrinthine, comes off the basilar and perfuses the cochlea and vestibular apparatus. | |
| Explain the key relationship of CN VII to the arterial supply on the ventral surface of the brain. | Runs under AICA. | |
| Explain the key relationship of CN X to the arterial supply on the ventral surface of the brain. | Runs over PICA. | |
| Explain the key relationship of CN IX & CN X to the arterial supply on the ventral surface of the brain. | Receive some blood from PICA. | |
| Identify the key areas of the brain that are supplied by the anterior cerebral artery. | Medial surfaces of cerebral hemispheres (frontal & parietal lobes, part of basal ganglia, corpus callosum). | |
| Identify the key areas of the brain that are supplied by the middle cerebral artery. | Lateral surface of cerebral hemispheres (frontal, parietal, & temporal lobes, inferior surface of frontal & temporal lobes). | |
| Identify the key areas of the brain that are supplied by the posterior cerebral artery. | Medial & inferior surface of temporal and occipital lobes, thalamus and hypothalamus. | |
| Identify the key areas of the brain that are supplied by the basilar artery. | Brainstem (pons, midbrain, medulla), anterior, inferior, & superior portions of the cerebellum. | |
| Discuss the result of the blockage or rupture of the anterior cerebral artery. | Severe hemiplegia (esp. contralateral LE), sensory loss over the contralateral LE, personality changes, urinary incontinence, apraxia. | |
| Discuss the result of the blockage or rupture of the middle cerebral artery. | Most common site of occlusion, if at origin=severe/fatal, contralateral hemiplegia/hemiparesis/hemiparesthesia in UE or face, homonymous hemianopia, corticospinal, coricobulbar, extrapyramidal tracts often involved. | |
| Discuss the result of a right occlusion of the middle cerebral artery. | Dyspraxis/apraxia, neglect syndromes. | |
| Discuss the result of a left occlusion of the middle cerebral artery. | Motor and sensory speech problems (aphasia). | |
| Discuss the result of the blockage or rupture of the posterior cerebral artery. | Homonymous hemianopia, memory loss, thalamic pain syndrome, contralateral hemianesthesia, hemichorea, central pain. | |
| Discuss the result of the blockage or rupture of the basilar & vertebral arteries. | Locked-in syndrome, paralysis of all extremities, disturbances in sensation, difficulty swallowing and in respiration. |
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