Law named after:
- Charles Bell (1774 - 1842)
- Francois Magendie (1783 - 1855)
Studied spinal nerves in dogs. Separately found in 1811 (CB) and 1822 (FM) that:
- dorsal spinal roots are sensory
- ventral spinal roots are motor
Supported idea of localization of function in different parts of the brain.