What feature best describes Brown Sequard syndrome?

Brown-Sequard syndrome is characterized by a hemisection of the spinal cord, which produces a distinctive pattern of neurological deficits due to the organization of the spinal tracts. The correct feature describing this condition is that there is ipsilateral loss of proprioception and motor function, along with contralateral loss of pain and temperature sensation.

This occurs because the spinal cord pathways operate across different sides. The corticospinal tract, which is responsible for voluntary motor control, and the dorsal columns, which transmit proprioception and tactile information, both ascend on the same side (ipsilateral side) of the lesion. Meanwhile, the spinothalamic tract, which carries pain and temperature sensations, crosses over to the opposite side (contralateral side) shortly after entering the spinal cord. Therefore, when one side of the spinal cord is damaged, the patient will experience weakness and loss of proprioception on that same side, while pain and temperature sensation will be lost on the opposite side.

The other options do not accurately capture the hallmark features of Brown-Sequard syndrome. Greater motor weakness in the upper extremities than lower extremities suggests a different type of spinal cord injury or disease. Areflexic bowel and bladder with sensory loss may indicate a clinical