“…The essence of the associative LTP methodology is the following: High-frequency stimulation of one input with low-intensity (weak) current is ineffective in inducing LTP. However, if the weak input is stimulated at the same time as a second strong input, then LTP will occur at the weak input (Auyeung, May, Goh, & Sastry, 1987;Brown, Kairiss, & Keenan, 1990;Sastry, Goh, & Auyeung, 1986). The dependence of the development of LTP on the necessary pairing of two (weak and strong) inputs led to the conception ofLTP as an associative process (Levy & Steward, 1979).…”