Figure 6.
Variation of ḡh in the silicon neuron (SiN ḡh) of a hybrid half-center oscillator. A, Typical activity at three different values of SiN ḡh. Voltage traces for the silicon neuron (SiN) and the heart interneuron (HN) and h-current conductance (SiN gh) for the silicon neuron are shown. As SiN ḡh increases, the burst duration (indicated by brackets) of the unaltered heart interneuron decreases. The asterisks indicate when during the inhibited phase h-current first reaches its maximal level of activation. B, Increasing SiN ḡh decreases the oscillator period. The period of the silicon neuron and the heart interneuron are the same. C, Increasing SiN ḡh decreases the burst duration of the heart interneuron, which is equivalent to the duration of the inhibited phase of the silicon neuron. D, Increasing SiN ḡh increases the final spike frequency of the heart interneuron, whereas the final spike frequency of silicon neuron remains relatively constant. In B-D, a thick line connecting data points indicates a significant effect of varying SiN ḡh as determined by ANOVA (p < 0.05), and asterisks indicate a significant difference (p < 0.05) between the measured value and the corresponding value when SiN ḡh was at its smallest value (2 nS) in pairwise comparisons.