“…Although the motor response of the vas deferens during short trains of impulses is reduced only 66% following a 97% reduction of the NA levels with reserpine (Marshall, Nasmyth & Shepperson, 1978), this may be due to reserpine reversing the normal depression in ej.p. amplitude which occurs during a high-frequency train to facilitation (see Figure 2 in Bennett & Middleton, 1975a (Dearnaley & Geffen, 1966;Kirpekar & Misu, 1967;Kopin, Breese, Krauss & Weise, 1968;Stjarne & Wennmalm, 1970;Stjarne, 1973) and relative changes in the amplitude of the e.j.p. (Bennett, 1973a;Bennett & Florin, 1975).…”