Table 3.
Results from tractography, mean diffusivity.
| Track | Corticospinal tract | p | Corticospinal tract | p | Corticospinal tract | p | |||
|
| |||||||||
| DTI scalars | rMD mean (SD) | rMD mean (SD) | rMD mean (SD) | ||||||
| Segment | Segment 1 | Segment 2 | Segment 3 | ||||||
| Infiltrated tract segment | n = 8 | 0.98 (0.05) | 0.383 | n = 8 | 1.01 (0.04) | 0.761 | n = 8 | 1.08 (0.10) | 0.009935 |
| Not infiltrated tract segment | n = 26 | 0.99 (0.04) | n = 26 | 1.01 (0.04) | n = 26 | 1.00 (0.04) | |||
|
| |||||||||
| Track | Inferior frontooccipital fasciculus | p | Inferior frontooccipital fasciculus | p | Inferior frontooccipital fasciculus | p | |||
|
| |||||||||
| DTI scalars | rMD mean (SD) | rMD mean (SD) | rMD mean (SD) | ||||||
| Segment | Segment 1 | Segment 2 | Segment 3 | ||||||
| Infiltrated tract segment | n = 14 | 1.19 (0.21) | 0.000122 | n = 15 | 1.20 (0.26) | 0.009287 | n = 14 | 1.07 (0.09) | 0.018801 |
| Not infiltrated tract segment | n = 19 | 1.00 (0.02) | n = 19 | 1.01 (0.04) | n = 19 | 0.99 (0.06) | |||
|
| |||||||||
| Track | Cingulum | p | Cingulum | p | |||||
|
| |||||||||
| DTI scalars | rMD mean (SD) | rMD mean (SD) | |||||||
| Segment | Segment 1 | Segment 2 | |||||||
| Infiltrated tract segment | n = 4 | 1.19 (0.15) | 0.002116 | n = 4 | 1.47 (0.55) | 0.001471 | |||
| Not infiltrated tract segment | n = 30 | 1.03 (0.04) | n = 30 | 1.01 (0.04) | |||||
|
| |||||||||
| Track | Parahippocampal cg | p | Parahippocampal cg | p | |||||
|
| |||||||||
| DTI scalars | rMD mean (SD) | rMD mean (SD) | |||||||
| Segment | Segment 1 | Segment 2 | |||||||
| Infiltrated tract segment | n = 5 | 1.44 (0.34) | 0.001574 | n = 5 | 1.37 (0.25) | 0.000793 | |||
| Not infiltrated tract segment | n = 29 | 1.03 (0.10) | n = 29 | 1.01 (0.08) | |||||
|
| |||||||||
| Track | Arcuate fasciculus | p | Arcuate fasciculus | p | |||||
|
| |||||||||
| DTI scalars | rMD mean (SD) | rMD mean (SD) | |||||||
| Segment | Segment 1 | Segment 2 | |||||||
| Infiltrated tract segment | n = 12 | 1.34 (0.28) | 0.000166 | n = 10 | 1.22 (0.21) | 0.001226 | |||
| Not infiltrated tract segment | n = 22 | 1.00 (0.04) | n = 21 | 1.01 (0.04) | |||||
|
| |||||||||
| Track | Inferior longitudinal fasciculus | p | Inferior longitudinal fasciculus | p | |||||
|
| |||||||||
| DTI scalars | rMD mean (SD) | rMD mean (SD) | |||||||
| Segment | Segment 1 | Segment 2 | |||||||
| Infiltrated tract segment | n = 8 | 1.19 (0.15) | 0.000602 | n = 8 | 1.11 (0.11) | 0.002844 | |||
| Not infiltrated tract segment | n = 26 | 1.01 (0.04) | n = 26 | 1.00 (0.06) | |||||
|
| |||||||||
| Track | Uncinate fasciculus | p | Uncinate fasciculus | p | |||||
|
| |||||||||
| DTI scalars | rMD mean (SD) | rMD mean (SD) | |||||||
| Segment | Segment 1 | Segment 2 | |||||||
| Infiltrated tract segment | n = 12 | 1.18 (0.15) | 0.000146 | n = 12 | 1.24 (0.27) | 0.15 | |||
| Not infiltrated tract segment | n = 21 | 1.01 (0.03) | n = 21 | 1.01 (0.04) | |||||
|
| |||||||||
| Track | Fornix | p | Fornix | p | |||||
|
| |||||||||
| DTI scalars | rMD mean (SD) | rMD mean (SD) | |||||||
| Segment | 1, midline | Segment 2 | |||||||
| Infiltrated tract segment | NA∗ | NA∗ | NA∗ | n = 2 | 1.09 (0.02) | 0.371 | |||
| Not infiltrated tract segment | NA∗ | NA∗ | NA∗ | n = 30 | 1.03 (0.19) | ||||
|
| |||||||||
| Track | Callosal body minor forceps | p | |||||||
|
| |||||||||
| DTI scalars | rMD mean (SD) | ||||||||
| Segment | Segment 1 | ||||||||
| Infiltrated tract segment | n = 9 | 1.13 (0.08) | 0.000209 | ||||||
| Not infiltrated tract segment | n = 25 | 1.01 (0.02) | |||||||
∗No ratio due to tract segment in midline.
rMD in infiltrated and not infiltrated tract segment presented as mean and standard deviation with results from Mann-Whitney U tests. p < 0.05 was regarded as statistically significant.
rMD = relative mean diffusivity (ipsilateral mean diffusivity/contralateral mean diffusivity), SD = standard deviation, cg = cingulum, and NA = not available.