TABLE 2.
Comparison between concave and convex sides of SSEP and MEP parameters
| Patients | Parameters | Concave side | Convex side | Concave side vs convex side | |
|---|---|---|---|---|---|
| With pre‐op neurological deficit (n = 55) | SSEP | P37 latency (ms) | 37.8 ± 3.8 | 36.4 ± 3.0 |
t = 3.582 p = 0.001 |
| N50 latency (ms) | 46.1 ± 4.2 | 44.7 ± 3.3 |
t = 3.326 p = 0.002 |
||
| Amplitude (μV) | 1.8 ± 1.1 | 1.9 ± 1.0 |
t = −0.568 p = 0.573 |
||
| MEP | Amplitude (μV) | 416.4 ± 321.6 | 644.9 ± 794.3 |
t = −2.577 p = 0.015 |
|
| Without pre‐op neurological deficit (n = 32) | SSEP | P37 latency (ms) | 36.3 ± 3.1 | 36.8 ± 4.3 |
t = −0.768 p = 0.451 |
| N50 latency (ms) | 45.3 ± 4.1 | 45.9 ± 5.2 |
t = −0.582 p = 0.567 |
||
| Amplitude (μV) | 1.8 ± 0.9 | 2.2 ± 1.6 |
t = −1.508 p = 0.147 |
||
| MEP | Amplitude (μV) | 454.8 ± 339.4 | 897.4 ± 1205.7 |
t = −2.344 p = 0.026 |
|
Abbreviations: MEP, motor evoked potentials; SSEP, somatosensory evoked potentials.