Figure 6.

STP diversity across temperatures and extracellular [Ca²⁺]. A, Facilitation index plotted against TCS for experiments conducted at different temperatures and extracellular [Ca²⁺] values. Group sizes: n = 22 for [Ca²⁺] = 1 mm, temperature = 24°C; n = 16 for [Ca²⁺] = 1 mm, temperature = 32–34°C; n = 16 for [Ca²⁺] = 2 mm, temperature = 24°C; n = 16 for [Ca²⁺] = 2 mm, temperature = 32–34°C. Diversity occurred for all recording conditions. B, Central values across groups classified by recording condition. Consistent with a tendency toward depression, the mean facilitation index (post-switch response) was <1, and the median TCS was positive (compare with dashed lines). Error bars indicate SEM.