Table 2.

Somatosensory evoked potentials results and comparison

	GROUP
	Siblings			JME without tremor			Essential tremor			Statistics
	Mean± Standard deviation	Minimum	Maximum	Mean± Standard deviation	Minimum	Maximum	Mean ±Standard deviation	Minimum	Maximum	Significance*
Right N20 latency (ms)	19.28±2.03	17.10	21.10	19.55±1.41	17.50	21.51	20.63±1.99	18.00	23.20	n.s.
Left N20 latency (ms)	18.80±2.09	17.40	21.20	19.35±1.29	17.50	21.67	20.53±1.81	18.17	23.50	n.s.
Right P25 latency (ms)	24.73±1.58	23.15	26.30	25.62±5.07	20.67	38.20	26.76±2.96	20.85	30.80	n.s.
Left P25 latency (ms)	24.43±1.68	23.25	26.35	25.16±4.44	20.20	35.80	26.89±2.80	21.20	30.30	n.s.
Right N35 latency (ms)	34.92±2.90	32.00	37.80	35.55±7.42	26.90	54.60	33.60±4.28	23.10	39.75	n.s.
Left N35 latency (ms)	33.93±3.23	31.35	37.55	35.19±6.87	26.20	51.90	35.28±5.73	23.10	44.55	n.s.
Right N20-P25 amplitude (μV)	7.53±2.17	5.90	10.00	4.25±1.16	3.10	6.60	2.93±0.90	0.92	4.20	p=0.001
Left N20-P25 amplitude (μV)	6.57±2.00	4.50	8.50	3.95±0.98	2.30	5.80	3.07±1.11	1.30	4.60	p=0.008
Right P25-N35 amplitude (μV)	6.73±1.74	5.40	8.70	2.31±1.23	0.94	4.90	1.60±0.71	0.35	2.80	p=0.01
Left P25-N35 amplitude (μV)	5.80±1.73	3.80	6.90	1.91±0.96	0.76	3.69	1.41±0.90	0.29	3.10	p=0.012

^*Kruskal Wallis test,

n.s: Not significant 274