Table 1.

Calculated properties of well-isolated single units obtained with the 128-channel silicon probe grouped according to insertion speed (average ± standard deviation).

Properties	0.002 mm/s	0.02 mm/s	0.1 mm/s	1 mm/s
Total number of separated single units	341	242	159	128
Number of separated single units per penetration	34.1 ± 12.2	24.2 ± 4.9	15.9 ± 7.9	14.2 ± 4.4
Peak-to-peak amplitude (µV)	182.1 ± 99.4	142.1 ± 71.6	127.1 ± 59.6	137.3 ± 63.0
First spike latency (s)	110.9 ± 246.0	209.5 ± 325.5	210.8 ± 329.9	294.4 ± 284.4
Isolation distance	43.8 ± 40.8	40.6 ± 39.8	31.6 ± 27.4	26.6 ± 28.0
Violation rate (%)	0.14 ± 0.24	0.12 ± 0.20	0.10 ± 0.16	0.12 ± 0.18