TABLE 1.

Percentage of CB1 and D2 Terminals in Acb Shell and Core Forming Subtype-Selective Synapses With Differentially Labeled Dendritic Targets

			Immunolabeling in postsynaptic targets
Acb region	Terminal labeling	Synaptic subtype	None	D2	CB1	D2/CB1
Shell	CB1	Excitatory	44.8	20.7	6.9	0.0
	N = 87*	Inhibitory	13.8	2.3	4.6	6.9
Core	CB1	Excitatory	42.7	20.6	3.7	2.4
	N = 82	Inhibitory	17.1	4.9	4.9	3.7
Shell	D2	Excitatory	56.5	8.7	4.3	0.0
	N = 42	Inhibitory	19.6	0.0	8.7	2.2
Core	D2	Excitatory	30.6	11.1	8.3	5.6
	N = 36	Inhibitory	19.4	5.6	13.8	5.6

^*Number of synaptic CB1 or D2 labeled terminals in an area of approximately 10,000 μm² in each Acb region from two sections in four rats. Tissue was processed using immunogold for CB1 and immunoperoxidase for D2 receptors.