Linking extracellular electric potential in the brain to neural activity - a review of source localization and component identification methods.

Due to technological advances in electrophysiology, there is renewed interest in the analysis of local field potentials recorded at many sites simultaneously. In this paper the main problems related to the analysis of LFP are presented, and recent developments in the data analysis methods are reviewed. The focus of the paper is on reconstruction of current source den sity from extracellular recordings and on decomposition of neural activity into meaningful components.