Table 1.

Presence of chemical synaptic transmission from neuron 110 at specific cell-cell contacts of three-cell neuronal networks.

Presynaptic	Postsynaptic	Third Cell	Actual†	Predicted††	χ2
5d 110c	5d 110	1d 110	0.25 (n=8)	0.17 (n=6)	0.273
5d 110c *	5d 19	1d 110	0.20 (n=10)	0.95 (n=21)	< 0.001
5d 110c	5d 110	1d 19	0.33 (n=6)	0.17 (n=6)	0.273
5d 110c *	5d 19	1d 19	0.13 (n=16)	0.95 (n=21)	< 0.001
5d 110c	1d 110	5d 110	0.50 (n=6)	0.50 (n=8)	0.480
5d 110c	1d 19	5d 110	0.50 (n=6)	0.25 (n=10)	0.057
5d 110c *	1d 110	5d 19	0.10 (n=10)	0.50 (n=8)	< 0.004
5d 110c *	1d 19	5d 19	0.06 (n=16)	0.25 (n=10)	< 0.02
5d 110	5d 110c	1d 110	0.18 (n=6)	0.18 (n=6)	1.00
5d 110 *	5d 19c	1d 110	0.50 (n=14)	0.95 (n=21)	< 0.004
5d 110	5d 110c	1d 19	0.10 (n=10)	0.17 (n=6)	0.074
5d 110 *	5d 19c	1d 19	0.25 (n=8)	0.95 (n=21)	< 0.004
1d 110	5d 110c	5d 110	0.17 (n=6)	0.11 (n=9)	0.289
1d 110	5d 19c	5d 110	0.71 (n=14)	0.80 (n=10)	0.114
1d 110	5d 110c	5d 19	0.10 (n=10)	0.11 (n=9)	0.724
1d 110 *	5d 19c	5d 19	0.00 (n=14)	0.80 (n=10)	< 0.004

^†Actual values equal the fraction of contacts in three-cell networks with cholinergic transmission detected.

^††Predict values equal the fraction of contacts among appropriately matched two-cell networks with cholinergic transmission detected.

^cindicates the central neuron of a three-cell network.

^*indicates a value significantly different from predicted two-cell networks.