400
M. V. L. BENNETT
Fig. 26. Potentials generated by the monophasically discharging Hypopomus.
Procedure as for Fig. 23, but recorded with the fish in the center of a somewhat
smaller container. The distance calibration gives recording sites with respect to
the fish referred to the level at the start of the records.
a
I msec
Fig. 27. Response of an electrocyte of monophasically discharging Hypopomus
to intracellularly applied depolarization. Upper trace: stimulating current. ( A,C )
Monopolar recording. Second trace: intracellular; third trace: external to uninnervated face; fourth trace: external to innervated face. (B,D) Differential
recording. Second trace: across innervated face; third trace: across uninnervated
face; fourth trace: across entire cell. Superimposed traces of threshold stimulation
with and without a response. The innervated face generates a spike, but there is
only a small potential across the uninnervated face.
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