The Simple Test That Tracks Nerve Damage

A tool used today to track diseases like leprosy originated from a psychologist studying brain maps. Her simple tactile test uses calibrated filaments to measure sensitivity across the body.

Josephine Semmes was a pioneer who helped us understand how the brain processes touch and spatial awareness. She discovered that our two brain hemispheres handle sensory data in distinct, specialized ways. Her development of the monofilament test became a global standard for medical diagnostics. It remains a vital tool for doctors to detect peripheral nerve damage in patients with diabetes or nerve-related infections.