Table 4.
Summary of Changes of MD in the Motor and Sensory Tracts of the Segments of the SC Cephalad and Caudal to the Level of MRI Lesion in TD and SCI Subjects
| MD cephalad | MD caudal | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Distal | Middle | Proximal | Proximal | Middle | Distal | |||||
| Motor tracts | ||||||||||
| TD | 1.39 ± 0.25 | 1.38 ± 0.21 | 1.02 ± 0.24 | 1.18 ± 0.36 | 1.20 ± 0.33 | 1.01 ± 0.23 | ||||
| SCI | 1.24 ± 0.29↓† | 1.24 ± 0.18↓‡ | 1.22 ± 0.24↑‡ | 1.06 ± 0.31 | 1.12 ± 0.26 | 1.00 ± 0.24 | ||||
| Sensory tracts | ||||||||||
| TD | 1.07 ± 0.26 | 1.09 ± 0.21 | 0.99 ± 0.28 | 1.19 ± 0.48 | 1.29 ± 0.50 | 1.03 ± 0.28 | ||||
| SCI | 1.08 ± 0.35 | 0.96 ± 0.19↓‡ | 0.95 ± 0.20 | 1.04 ± 0.30 | 1.13 ± 0.34 | 0.95 ± 0.30 | ||||
Unit for MD is given in 10−3 mm2/s
Bold indicates significantly different DTI value in SCI subjects than in TD.
↓ indicates decreased DTI value; ↑ indicates increased DTI value in SCI compared with TD.
†
p < 0.01, ‡p < 0.001 indicates significant difference from TD.
MD, mean diffusivity; SC, spinal cord; MRI, magnetic resonance imaging; TD, typically developing; SCI, spinal cord injury.