An individual was brought into the emergency department after a motor vehicle collision. This patient is conscious and reports no loss of consciousness during the incident. There is no physical evidence of any head trauma. However, upon examination, the following sensory deficits are noted: loss of fine touch and vibration sense in both the left arm and leg, including the hand and foot, and loss of pain and temperature sense in the right arm and leg, including the hand and foot.
-The loss of pain and temperature sense involves which of the following nerve tracts in this patient?

Question

Quizplus · Accepted Answer

The loss of pain and temperature sense indicates a lesion in the anterolateral system, which is responsible for carrying pain and temperature sensations. The involvement of the left arm and leg points to a lesion on the right side of the spinal cord, where the anterolateral tracts cross over. The absence of fine touch and vibration sense in the same limbs indicates a separate lesion in the dorsal column system, which carries those sensations.

An Individual Was Brought into the Emergency Department After a Motor