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NeuroScenarios

Neuroanatomy Scenarios

QuestionAnswer
There is a lesion impinging on the right side of the spinal cord in the lumbar region. Would this cause any loss in mechanical somatic sensation in the left leg? No. The dorsal column medial lemniscal system decussates in the caudal medulla. Therefore, the LESION would have to be on the left side to have a mechanical sensation impairment in the left side.
There is a lesion impinging on the Left side of the spinal cord in the lumbar region. Would this cause any loss in mechanical somatic sensation in the left leg? Yes, the dorsal column medial lemniscal system decussates in the caudal medulla. Therefore, the mechanical sensation deficit would be on the same side of the lesion. Light discriminative touch, vibration, pressure, position
If there were a lesion in the thoracic region on the Gracile neuron tract, what would happen? You would lose mechanical sensation to the lower extremity on the same side as the lesion. Light discriminative touch, vibration, pressure, position
If there is a lesion on the left side of the spinal cord in the lumbar region, what side will have decreased pain and temperature sensation? The right side Anterolateral System Pain and Temperature Sensation
If there is a lesion on the left side of the spinal cord in the lumbar region, What would cause increased tone in the left side? Upper motor neuron tract is interrupted. Lower motor neuron lesions cause flaccidity.
If there is a lesion on the left side of the spinal cord in the lumbar region, how might this patient might present? Left sided sensation loss to vibration, pressure, light touch --> DCML pathway Right sided sensation loss to pain and temperature --> Anterolateral Pathway Left sided spasticity from upper motor neuron interruption --> Corticospinal??
Created by: alison.simpson
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