What do neuroscientists mean when they speak about the function of a specific brain area? We read and teach about M1 as the 'motor' cortex, about hippocampus as the 'memory' part of the brain, about striate cortex as the 'primary visual' area, and so forth. Cognitive electrophysiologists insert electrodes in specific brain areas to later characterize the function of the area.
It is true that concurrently recorded electrodes, placed in different brain areas of the same animal, provide different activity patterns. Even at the electroencephalogram level, voltage time series are different in different scalp sites. The brain is not an equipotential mass. But we don't have to live at the ends of the spectrum. Rejecting equipotentiality does not, by itslef, render support to modularity.
asasas \cite{Jarvis2001} . \cite{2015}asasas