Summary of results. Significant STF and ITF were expressed with either spaced or massed application of 5HT. Significant LTF was expressed in the spaced group but not in the massed group. (*) Significant facilitation from baseline (P < 0.05). For the spaced group (top), from left to right, n = 10, 6, 8, 7, 8, 9, and 10. For the massed group (bottom), n = 9 for all tests except T45, where n = 7.