With Gall's efforts, localization came into vogue. There was an overemphasis on localization from the 1880's to the 1930's. The Crisis Hughlings Jackson was resistant to localization. He approached the problem from the idea of level of construction rather than specific localization. His ideas were too complex for the time.
Many functions are the result of activity of the whole brain.
Categoric behavior - highest level, dependent upon mass of the brain rather than specific localization. Equipotentiality Flourens' data was there for continual challenge. During WWII localization was abandoned for wholistic approach. Connectionism H. Jackson emphasized levels of function. Luria discussed functional systems.