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11 Cards in this Set
- Front
- Back
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What is the purpose of the Dorsal Column / Medial Lemniscus
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To convey accurate information to the ventral posterior lateral nucleus of the thalamus.
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Dorsal Column / Medial Lemniscus conveys what modalities
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proprioception, vibration, 2 point discrimination
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With Dorsal Column / Medial Lemniscus what receptor and neurons are involved
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Receptors:
Pacinian= Deep touch, vibration Meissner's= Superficial touch Merkel's= Superficial touch Ruffini= Deep touch, vibration Muscle spindle= proprioception Golgi= proprioception ( |
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Dorsal Column / Medial Lemniscus decussation is located where?
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the internal arcuate fibers decussate at the lower medulla
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Injury or lesion to Dorsal Column / Medial Lemniscus would cause what deficit and how would this present clinically in your office.
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partial or total loss of proprioception, vibration, and 2 point discrimination distal to the lesion. (contralateral if lesion is above the medulla or ipsilateral if the lesion is below the medulla)
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ASL pathways purpose
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carries non accurate information from the periphery to the VPL nucleus of the thalamus, and on up into the somatosensory cortex.
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ASL modalities conveyed
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1. Pain
2. Temperature 3. Touch 4. Pressure |
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ALS Receptor, neurons involved,
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Free naked endings aka bare nerve endings
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ALS decussation
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Anterior commissure of the spinal cord. (note: it takes 2 to 3 segments to cross)
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Injury or lesion to al tract would cause what deficit and how would this present clinically in your office.
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a lateral cord lesion will affect contralateral pain and temperature beginning a few segments below the lesion.
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What pathways make up the Anterolateral system?
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Spinothalamic, spinoreticular, spinomesencephalic
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