Table 3.
Differences between people who stutter and controls in structural integrity of white matter tracts
| White matter region | X | Y | Z | t-statistic |
|---|---|---|---|---|
| PWS lower FA than Controls | ||||
| Right inferior frontal gyrus (pars orbitalis) | 47 | 36 | -10 | 4.36 |
| Left inferior frontal gyrus (posterior)* | -43 | 25 | 14 | 4.75 |
| Right inferior frontal gyrus (posterior)* | 44 | 20 | 12 | 4.6 |
| Right precentral gyrus * | 59 | 7 | 33 | 3.37 |
| Left precentral gyrus * | -51 | 4 | 32 | 4.04 |
| Right ventral premotor* | 55 | 4 | 13 | 3.56 |
| Left ventral premotor* | -54 | 0 | 20 | 3.39 |
| Right corticospinal tract (top of midbrain) | 17 | -15 | -8 | 3.28 |
| Right supramarginal / angular gyrus | 46 | -46 | 28 | 3.90 |
| Left supramarginal gyrus | -40 | -56 | 40 | 4.13 |
| Left dorsal pons (medial lemniscus) * | -6 | -37 | -34 | 4.66 |
| Right dorsal pons (medial lemniscus) * | 5 | -37 | -36 | 3.55 |
| Right middle cerebellar peduncle | 13 | -42 | -38 | 4.42 |
| Right anterior cerebellar lobe | 36 | -49 | -30 | 3.71 |
| Left posterior cerebellar lobe* | -21 | -63 | -39 | 3.56 |
| Right posterior cerebellar lobe* | 27 | -67 | -37 | 3.80 |
| PWS higher FA than Controls | ||||
| Left inferior frontal gyrus (posterior and ventral) | -47 | 24 | 4 | 3.57 |
| Right postcentral gyrus | 45 | -19 | 44 | 4.58 |
| Right supramarginal gyrus | 45 | -37 | 35 | 4.03 |
*
Regions showing symmetrical bilateral differences in FA