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16 Cards in this Set
- Front
- Back
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Describe blood supply to the PCML pathway in the spinal cord.
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Two posterior spinal arteries (from PICA) supply the posterior columns (gracile & cuneate fasiculus).
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What is the arterial supply of the posterior columns?
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Two posterior spinal aa, arising from PICA.
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What would be the result of a spinal cord lesion involving the posterior columns?
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IPSILATERAL loss of fine touch and proprioception for dermatomes below the site of lesion.
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Describe blood supply to the medial lemniscus in the medulla.
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The paramedian branches of the vertebral artery and the anterior spinal artery supply the medial vascular zone (PCML).
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What would be the result of a medullary lesion involving the medial lemniscus?
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CONTRALATERAL loss of fine touch and proprioception in 1/2 of the body.
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Describe blood supply to the medial lemniscus in the pons.
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The paramedian branches of the basilar artery supply the medial vascular zone (PCML).
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What would be the result of a lesion in the medial vascular zone of the pons?
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CONTRALATERAL loss of fine touch and proprioception in 1/2 of the body.
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Describe the blood supply for the PCML pathway in the midbrain.
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The posterior cerebral artery (PCA, lateral vascular zone) supplies the medial lemniscus.
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What would be the result of a lesion in the lateral vascular zone of the midbrain?
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CONTRALATERAL loss of fine touch and proprioception in 1/2 of the body.
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Describe the blood supply to the PCML in the thalamus.
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The thalamogeniculate & thalamoperforator arteries (branches of PCA) supply the VPL nucleus.
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What would happen to a patient with a lesion in the VPL nucleus?
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CONTRALATERAL loss of fine touch and proprioception in 1/2 of the body.
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Describe blood supply to the PCML in the posterior limb of the internal capsule (PLIC).
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Anterior choroidal artery (smal branch of internal carotid) supplies PLIC.
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How would a patient with a lesion in PLIC present?
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CONTRALATERAL loss of fine touch and proprioception in 1/2 of the body.
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Describe the blood supply to the PCML in the primary somatosensory cortex.
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The anterior cerebral artery (ACA) supplies superior regions and the medial cerebral artery (MCA) supplies lateral regions.
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Describe effects on PCML of an ACA lesion.
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Loss of fine touch and proprioception from CONTRALATERAL leg.
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Describe effects on PCML of a MCA lesion.
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Loss of fine touch and proprioception from CONTRALATERAL arm.
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