Changes of the SN in patients with Parkinson disease
| Change | Parkinson Disease Group (n = 22) | Control Group (n = 22) |
|---|---|---|
| Area of the SN, mm2 | 51.2 ± 5.1* | 53.1 ± 6.2 |
| Area of the midbrain, mm2 | 553 ± 40* | 587 ± 58 |
| SN/midbrain, % | 9.3 ± 0.1* | 9.1 ± 0.1 |
| Thickness of SN, mm | 4.3 ± 0.4* | 4.4 ± 0.4 |
| Width of hyperintense band on T2 Weighted images, mm | 1.6 ± 0.2* | 1.7 ± 0.3 |
* P > .05, compared with value in control subjects.