REVIEW ARTICLE tie efficiency in the hippocampus NMDA receptor-dopondent NMDA receptor-independen STP:LTP1.23 Paired-pulse tacilitatio Non-Hebbian LTP Mossy tbre LTP oute to the be due to( 1)pres s which tion such as an increas in the nun ach as reducti in uptake o he lab rele is derive nents have red the overflow of radiol the fae 10e the indu 52 or pres naptic n for least several hour that unde al ary for th Other ted purely mod has been Expression of LTF tion cted if the state NATURE·VOL361·7 JANUARY1993 0193 g Group © 1993 NaturePublishingGroup