Table 1.

Neurochemical composition of PHA-L-labeled axon terminals and their targets in the rat VTA

	PHA-L-labeled terminals synapsing on dendrites		PHA-L-labeled terminals synapsing on dendritic spines
	Asymmetric synapses	Symmetric synapses	Asymmetric synapses	Symmetric synapses
Total number of PHA-L-labeled terminals making recognizable synapses [100% (n = 54)]	50% (n = 27)	41% (n = 22)	9% (n = 5)	0% (n = 0)
PHA-L-labeled terminals with VGluT2 signal [56% (n = 30)]	80% (n = 24)	10% (n = 3)	10% (n = 3)	0% (n = 0)
PHA-L-labeled terminals without VGluT2 signal [44% (n = 24)]	13% (n = 3)	79% (n = 19)	8% (n = 2)	0% (n = 0)