Time course of repetitive heterosynaptic facilitation in Aplysia californica

Plasticity of synchronous activity in a small neural net

Electrical activity from three neurons at a time was recorded in a pleural ganglion of Aplysia. Synchonous activity could be temporally patterned by electrical stimulation over a single nerve. After a period of pairing with electrical stimuli over another nerve the degree and time course of the synchrony were altered. Such alterations reverted after 5 to 30 minutes.