1. Synaptic plasticity: Going through phases with LTP
Emily P Huang 
Current Biology 
Volume 8, Issue 10, Pages R350-R352 (May 1998)
DOI: /S (98)

2. Figure 1
Early and late phases of long-term potentiation (LTP). A train of repetitive stimuli (arrows) induces an increase in synaptic strength known as LTP. A single train of stimuli induces E-LTP (red), which decays over the course of a few hours. Multiple trains also induce L-LTP (blue), which remains stable for many hours.
Current Biology 1998 8, R350-R352DOI: ( /S (98) )