History of neuroscience
During the second half of the first millennium BC, the Ancient Greeks developed differing views on the function of the brain. However, due to the fact that Hippocratic doctors did not practice dissection, because the human body was considered sacred, Greek views of brain function were generally uninformed by anatomical study. It is said that it was the Pythagorean Alcmaeon of Croton (6th and 5th centuries BC) who first considered the brain to be the place where the mind was located. According to ancient authorities, "he believed the seat of sensations is in the brain. This contains the governing faculty. All the senses are connected in some way with the brain; consequently they are incapable of action if the brain is disturbed...the power of the brain to synthesize sensations makes it also the seat of thought: The storing up of perceptions gives memory and belief and when these are stabilized you get knowledge." In the 4th century BC Hippocrates, believed the brain to be the seat of intelligence (based, among others before him, on Alcmaeon's work). During the 4th century BC Aristotle thought that, while the heart was the seat of intelligence, the brain was a cooling mechanism for the blood. He reasoned that humans are more rational than the beasts because, among other reasons, they have a larger brain to cool their hot-bloodedness.
Giovanni Maria Lancisi
Lancisi described the corpus callosum as the "seat of the soul, which imagines, deliberates and judges." His "Dissertatio Physiognomica" provided the supporting argument in 1713. He opposed alternative locations of the soul as hypothesized by others, such as the centrum ovale, by Andreas Vesalius, and the pineal gland, by René Descartes. He hypothesized that the Longitudinal striae (later named in his honor as the "striae lancisi" or "nerves of Lancisi") were the conduit between the anterior location of the soul, and the posterior location of sensory organ functions, both within the corpus callosum.