Effect of varying AHP parameters and qsize separately and together, integrate-and-fire model, on discharge regularity (CV*; A) and on galvanic sensitivity (β; B) with both variables plotted against synaptic noise, σV. C: galvanic sensitivity (β) vs. CV*. In A–C, 3 series are shown (as listed in Table 1): series 1a–1c, AHP parameters and qsize are varied (●); series 2a–2c, AHP parameters varied, qsize kept constant (▲); series 3a–3c, AHP parameters set at intermediate values, qsize varied (*).