Neuroanatomy · lesion localization
Spinal cord, sliced open.
Pick a lesion pattern. The map will light up the tracts involved, then translate them into what is lost, where, and on which side.
Cross-section · posterior viewP ↑   A ↓
POSTERIORANTERIORLEFTRIGHT DCDCCSTCSTSTTSTT
Dorsal columnsLateral STTLateral CST
Tap a tract or legend item to isolate it. Then choose a lesion.

Choose the lesion

Exam lockDC + CST stay ipsilateral in the cord. The spinothalamic tract has already crossed within 1–2 segments, so its loss is contralateral to a cord hemisection.