[Helmholtz, a light for the neurosciences]

Helmholtz was an outstanding scientist, and dominated physiology during the second half of the XIXth century in the field of visual and auditory perception. Philosopher, he was deeply indebted to Kant for elaboration of empirical and experimental approach of facts. Man of culture, he laid the foundations of a scientific approach of music and painting. His work remains a fundamental contribution to the theory of knowledge.