Before revision:  In this context, synaptic plasticity refers to the set of mechanisms driving the dynamics of neuronal connections, called synapses {\em  and represented by a scalar value, the synaptic weight.
After revision:  In this context, synaptic plasticity refers to the set of mechanisms driving the dynamics of neuronal connections, called synapses {\em synapses and represented by a scalar value, the synaptic weight.