Figure 3.

CM-induced plasticity of synaptic connections between identified Lymnaea neurons. Inappropriate inhibitory synapses developed in DM between RPeD1 and VD2/3, and VD4 and LPeD1 (1). Twelve hours after the initial soma–soma pairing, DM was replaced with CM (2), which in turn promoted the formation of excitatory synapses. When DM was replaced with DM, however, neither did the excitatory synapses develop nor were the inhibitory connections eliminated (3). (Solid bars) Excitatory synapses; (hatched bars) excitatory and inhibitory synapses; (dotted bars) inhibitory synapses. The n values for each experiment are noted above the data bars.