Table 1.

Postsynaptic Ca²⁺ concentration [µM]

Synaptic weight	Input frequency [Hz]					Pre-post firing interval [msec]
Synaptic weight	1	10	20	50	100	−15	−5	5	15
1e⁻⁸ (small)	0.11	0.14	0.22	0.60	1.0	0.12	0.16	0.69	0.40
3e⁻⁸ (medium)	0.15	0.19	0.30	0.85	1.0	0.17	0.21	0.78	0.46
6e⁻⁸ (large)	0.27	0.32	0.52	0.90	1.0	0.29	0.33	0.93	0.61

Points are extracted from Figure 2C,D, showing [Ca²⁺] under input stimuli of frequency 1, 10, 20, 50, and 100 Hz, or pre-post firing intervals of −15, −5, 5, and 15 ms, when initial synaptic weights are small (1e⁻⁸), intermediate (3e⁻⁸), and large (6e⁻⁸). Red indicates LTP and blue indicates LTD.