The Golgi stain is a histological technique used to visualize neurons in their entirety. Developed by the Italian scientist Camillo Golgi in the late 19th century, this method employs a silver chromate solution that selectively stains a small percentage of neurons, allowing researchers to observe their complex structures, including dendrites and axons. This staining technique is particularly valuable in neuroscience, as it helps in studying the morphology of neurons and understanding their connections within the brain. The Golgi stain has contributed significantly to the field, aiding in the discovery of various neuronal types and their roles in the nervous system.