Table 1.

Morphological properties of peroxidase-labelled PPN neurons

	Cell body area (μm2)	Total no. dendritic spines	No. of primary dendrites	Total dendritic length (μm)	Mean dendritic length (μm)	No. of local boutons
ChATa neurons (n = 6)	378 ± 60	29 ± 16	4.67 ± 0.36	2729 ± 441	595 ± 62	74 ± 35
ChATi neurons (n = 2)	432	0	4	768	228	48
Non-cholinergic neurons (n = 6)	162 ± 33	32 ± 32	5.17 ± 0.6	2736 ± 752	633 ± 201	5 ± 4

Values shown are mean ±s.e.m. for ChATa and non-cholinergic neurons, or only mean for ChATi neurons. Two cholinergic labelled neurons were not included in this table because they could not be classified as either ChATa or ChATi neurons.