Santiago Ramon y Cajal

Santiago Ramon y Cajal was a Spanish histologist and pathologist who became the first Spaniard to win a scientific Nobel Prize, sharing the 1906 Nobel Prize in Physiology or Medicine with Camillo Golgi. Using an improved version of Golgi's own staining method, Cajal showed that the nervous system was built from separate, discrete cells rather than a continuous connected network, evidence that established the neuron doctrine against the rival reticular theory Golgi himself had favored. He produced hundreds of detailed drawings mapping neurons across many species and brain regions, identifying structures such as dendritic spines and growth cones, and his combination of precise observation and artistic skill made his atlases of the nervous system foundational to modern neuroscience.