Table 2.

Linear relationship between the CPP score (i.e., time spent in the AMPH-paired minus the time spent in the unpaired chamber during the CPP test) and synaptic parameters evaluated at 24 h after the CPP test in the BLA

	CPP score and
	Synapses (number)	Synapses (density)	Synaptic events
Asymmetric	0.47*	0.46*
Asymmetric axospinous	0.47*	0.47*
Asymmetric axodendritic	0.14	0.13
Multisynaptic boutons	0.61*	0.61*
Spontaneous synaptic events			0.48*

Data reveal Pearson's r, *p < 0.05.