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16 Cards in this Set

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