Figure 6. Inactivation does not change within repeated heat stimuli.

Currents induced by three repeated heat stimuli of 45 °C in a heat-sensitive neurone (size: 30 μm, resting membrane potential −52 mV, interstimulus intervals 35 and 36 s). Across the three heat responses the peak current decreased (tachyphylaxis) but the degree of relative inactivation of each current was almost identical over the three stimuli (40, 45 and 52 %).