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25 Cards in this Set
- Front
- Back
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Q. Anterior Cerebral Artery
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Most important region clinically is lower limb section of sensori-motor cortex and anterior/middle aspect of corpus callosum
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Q. Posterior Cerebral Artery
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Supplies calcarine fissure for vision, medial temporal lobe for limbic lobe, and portions of lower internal capsule especially midbrain-diencephalon junction at cerebral crura
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Q. Most common artery for stroke?
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Middle cerebral artery
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Q. lenticulo-striate infarct happens where?
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M1-M2 artery of middle cerebral artery
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Q. Anterior Cerebral Arterys supllies?
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top parietal artery
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Q. Anterior Spinal Artery?
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affects anterior horn and spinothalamic tracts
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Q. Posterior Spinal arteries?
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affects posterior columns
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Q. Vertebral Artery:
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Branch of subclavian, ascends thru foramina of the cervical vertebrae, enters the foramen magnum, join together to form basilar. Most important branches: anterior spinal and PICA
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Q. Basilar artery:
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ascends along the ventral midline of brain stem, terminates by dividing into posterior cerebral arteries. Most important branches: AICA, paramedian arteries, labyrinthine to ear, & PCA.
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Q. Brain stem lesions:
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1.) Injuries almost always involve one or more cranial nerves. Use that info to localize damage.
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Q. Hypothalamic Lesions Are?
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ipsilateral and give a Horner’s syndrome
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Q. Meningeal hemorrhage:
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subarachnoid hemorrhage would be due to compromised arterial blood vessels usually due to systemic hypertension
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Q. Aneurysm:
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dilation of a vessel wall. Usually occur at the branching of a vessel. 85% in internal carotid system
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Q. Cerebral Embolism:
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Occlusion of a vessel due to extraneous material, tumors, clot, plaque. Very small clots may only compromise a small artery (transient ischemic attack, TIA). Common cause is endocarditis secondary to heart disease.
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Q. Arteriovenous malformation:
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(AVM) abnormal communication between arteries and veins. Can be quite large and tortuous enough to detect on MRI.
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Q. Tumor of Jugular Bulbar?
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IX, X, XI nerves. Would have horsness of voice, difficulty digestion, turning head, can’t swallow
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Q. Lateral Corticospinal Tract
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1. control of distal musculature.
2. Fine control via pyramidal cells of the primary motor cortex |
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Q. Medial Corticospinal Tract
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1. control of axial musculature
2. Usually decussate near target motor pool 3. Sometimes bilateral innervation of the motor pool |
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Q. Vascular lesions in the posterior limb of the Internal Carotid result in?
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result in contralateral hemianasthesia due to injury of thalamocortical fibers
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Q. Reticulospinal tract gamma motor neurons activation?
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involved in the maintenance of posture and modulation of muscle tone
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Q. Reticulospinal tracts influence?
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muscle tonus, respiration, coughing and sneezing (automatic) and walking (voluntary
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Q. Rubrospinal tract decusate where?
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anterior tegmental
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Q. large motor neurons are referred to as?
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alpha motor neurons
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Q. tectum
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Behind aqueduct
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Q. tegmental
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In front of aqueduct
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