Comparison of the motor threshold and intensity needed to achieve a 1 mV motor-evoked potential amplitude of controls and psychopathic offenders
| Group; mean ± SD | |||
|---|---|---|---|
| Factor | Control | Psychopathy | p value |
| Without cap | |||
| MT | |||
| Left | 37.7 ± 5.7 | 37.9 ± 5.6 | 0.92 |
| Right | 40.9 ± 8.7 | 42.0 ± 8.7 | 0.72 |
| 1 mV | |||
| Left | 52.0 ± 9.8 | 48.4 ± 10.8 | 0.34 |
| Right | 59.3 ± 15.1 | 66.0 ± 18.3 | 0.27 |
| With cap | |||
| MT | |||
| Left | 53.7 ± 8.7 | 52.5 ± 7.4 | 0.43 |
| Right | 53.1 ± 7.2 | 54.0 ± 10.4 | 0.88 |
| 1 mV | |||
| Left | 64.1 ± 10.0 | 64.1 ± 11.5 | > 0.99 |
| Right | 67.3 ± 10.3 | 72.3 ± 16.7 | 0.34 |
MT = motor threshold; SD = standard deviation.