Fig. 2.
CASM movements up to the far side of the cell. (A) Enlargement of parts of the records from Fig. 1, showing eight separate microelectrode movements down into a snail neurone. After the first two depolarsations we moved the CASM down in six steps of 20 μm and two steps of 10 μm, as shown in the upper trace, to investigate how the responses changed. Each depolarisation was by 50 mV from the holding potential of −50 mV, for 1 s every 2 min. (B) Enlargements of the three VCa transients arrowed in part (A). The vertical lines indicate the times at which the membrane was depolarised by 50 mV for 1 s.