A, a typical example showing that stimulus interruption for 10 min, commencing 20 s after HFS, prevented the induction of LFS-DEP when LFS was applied 10 min after two trains of 100 Hz HFS. B, summary of data from six experiments performed as in A. C, a typical example showing that stimulus interruption for 10 min commencing 20 s after HFS prevented the induction of DCG-IV-DEP (3 μm for 5 min) when LFS was applied 10 min after two trains of 100 Hz HFS. D, summary of data from six experiments performed as in C.