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Fig. 4. Mean number of T-cell action potentials for each echolocation sequence and
mean of the five greatest instantaneous spike rates per intensity for
Neoconocephalus ensiger and Amblycorypha oblongifolia. Black
lines: Myotis septentrionalis gleaning attack echolocation sequence;
grey lines: M. septentrionalis search call sequence. Bars indicate
± s.e.m. B, background activity (see Materials and methods). Different
letters indicate significant differences between activity levels.