|A.||Posterior spinal artery|
Lateral corticospinal tract
Central spinal cord grey matter
Answer A) Posterior spinal artery
A unilateral loss of proprioception and vibration with preservation of motor function and pain sensation indicates isolated damage to this patient’s dorsal column.
Posterior spinal artery
Injury to the right posterior spinal artery leads to posterior spinal artery syndrome due to ischemia and subsequent infarction of the posterior column, which is directly supplied by this artery.
Affected patients present with absent ipsilateral proprioception and vibration sensation below the level of the wound.
In most cases, sensation to light touch is preserved. This patient’s normal motor function and sensation to pain rule out any further injury to the corticospinal tract and spinothalamic tract.