Fig 1. Afferent electrosensory projections trifurcate to three parallel maps in the ELL.

(A) Peripheral input from cutaneous electroreceptors (p-units) to pyramidal cells in the electrosensory lateral line lobe (ELL, see B & C) is organized in receptive fields (RF) that differ in size and overlap [30] between 3 parallel segments of the ELL. (B) Electroreceptors on the skin trifurcate into each of the three parallel ELL segments (LS: lateral segment (blue); CLS: centro-lateral segment (magenta); CMS: centro-medial segment (green)). (C) The pyramidal neurons within each segment are the sole output cells and are organized in columns. (C) Correlations between the activities of pyramidal cell pairs in CLS were shown previously to increase linearly as a function of RF overlap (data reproduced from [7]).