Damage to the right dorsal column at the T10 level will cause loss of which modality in which body part?

• A Left lower limb vibration sense and conscious proprioception
• B Right lower limb vibration sense and conscious proprioception ✓
• C Right lower limb pain and temperature
• D Bilateral lower limb vibration sense

Explanation

The posterior (dorsal) columns are ipsilateral — primary afferents ascend uncrossed in the fasciculus gracilis (lower limb) and fasciculus cuneatus (upper limb) to the medullary nuclei, where second-order neurons decussate. Damage at T10 on the right disrupts ipsilateral (right) lower limb vibration sense, joint position, and two-point discrimination. Pain and temperature are carried by the contralateral spinothalamic tract after decussating one to two segments from entry.

Reference: BD Chaurasia's Human Anatomy, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.