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What is A patient has preserved light touch and absent pain and temperature over the left upper limb. This pattern of sensory loss is called- and explain in detail?
Dissociated sensory loss describes the loss of pain and temperature sensation resulting from involvement of the crossing of spinothalamic second-order neurons, with sparing of dorsal column function. Worsening spasticity is attributable to increasing involvement of the descending coicospinal tracts Ref Harrison20th edition pg 2236