Table 1.

Proportions and mean latencies of PSPs evoked in various populations of spinocerebellar tract neurones by stimuli applied in the MLF

		SB			VSCT			CC DSCT			dh DSCT
		Incidence	%	Latency (ms) mean ±s.e.m.	Incidence	%	Latency (ms) mean ±s.e.m.	Incidence	%	Latency (ms) mean ±s.e.m.	Incidence	%	Latency (ms)
					26/93″	28%	0.66 ± 0.03
EPSPs	Mono ipsi	10/23	43%	0.69 ± 0.06	5/17	29%	0.77 ± 0.14	0/21	0%		0/13	0%
	Mono contra	6/51	12%	0.94 ± 0.05*	17/44	38%	0.79 ± 0.03*	0/14	0%		0/23	0%
					25/93″	27%	1.46 ± 0.04
EPSPs	Di-, trisyn ipsi	8/23	35%	1.43 ± 0.06	11/17	65%	1.58 ± 0.12	0/21	0%		0/13	0%
	Di-, trisyn contra	15/51	29%	1.98 ± 0.19**	23/44	52%	1.46 ± 0.07 ns	7/14	50%	1.78 ± 0.06	1/23	4%	2.43
					14/93″	15%	1.42 ± 0.11
IPSPs	Di-, trisyn ipsi	18/23	78%	1.46 ± 0.10	12/17	71%	1.34 ± 0.13	8/21	38%	1.87 ± 0.13	0/13	0%
	Di-, trisyn contra	26/51	51%	1.56 ± 0.04 ns	29/44	66%	1.59 ± 0.05 ns	3/14	21%	3.37 ± 0.11***	1/23	4%	2.82

Vertical columns, proportions and mean latencies (with s.e.m.) of PSPs evoked in 74 SB neurones, 61 VSCT neurones, 35 CC DSCT neurones and 36 dh DSCT neurones investigated in this study in preparations in which the spinal cord was transected either ipsilaterally or contralaterally. The data are for monosynaptic EPSPs and for oligosynaptic EPSPs and IPSPs, including only those with segmental latencies not exceeding 3.5 ms. Data from additional SB, VSCT and DSCT neurones analysed in preparations in which no hemisections were performed, or were found to be incomplete, are not included in the table but are referred to in the text. Additional data of Baldissera & Roberts (1975) for VSCT neurones are given in italics and indicated by ″. Statistical significance of differences between PSPs evoked from the ipsilateral and contralateral MLF is indicated to the right of the contra MLF data (Student's t test for two samples assuming equal variance)

^*P 0.01–0.05;

^**P 0.001–0.01;

^***P < 0.001; ns, not statistically significant.