Sensory disturbance consisting of A. Pain, sensory loss and paraesthe

1.	Sensory disturbance consisting of A. Pain, sensory loss and paraesthesiae in one leg suggests a spinal cord lesion. B. Loss of pain, temperature but not touch sensation in the arms suggests a spinal cord lesion. C. Loss of two-point discrimination but not touch sensation suggests a lesion in the thalamus. D. Loss of all sensations on the left side suggests a right internal capsule lesion. E. Loss of all sensations in a skin region suggests a peripheral nerve or posterior root lesion.
Answer» A. False Pain is uncommon with spinal cord lesions; the symptoms suggest irritation of a sensory root or peripheral nerve. B. True The fibres carrying these sensations run in separate tracts in the spinal cord. C. False It suggests a parietal cortex lesion where such sensory discriminations are made. D. False It suggests right-sided brain-stem damage since pain is appreciated at subcortical level. E. True Only peripheral nerves and posterior roots carry all modalities of sensation together from a circumscribed skin area.

Sensory disturbance consisting of A. Pain, sensory loss and paraesthesiae in one leg suggests a spinal cord lesion. B. Loss of pain, temperature but not touch sensation in the arms suggests a spinal cord lesion. C. Loss of two-point discrimination but not touch sensation suggests a lesion in the thalamus. D. Loss of all sensations on the left side suggests a right internal capsule lesion. E. Loss of all sensations in a skin region suggests a peripheral nerve or posterior root lesion.

Answer»

A. False Pain is uncommon with spinal cord lesions; the symptoms suggest irritation of a sensory root or peripheral nerve.

B. True The fibres carrying these sensations run in separate tracts in the spinal cord.

C. False It suggests a parietal cortex lesion where such sensory discriminations are made.

D. False It suggests right-sided brain-stem damage since pain is appreciated at subcortical level.

E. True Only peripheral nerves and posterior roots carry all modalities of sensation together from a circumscribed skin area.