Table 2.
Cluster |
Brain Regionsa |
Side |
Voxels (No.) |
P Value |
Montreal Neuroimaging Institute Coordinate of Peak Voxelb |
z Statistic Maximum |
||
x
|
y
|
z
|
||||||
Isolated knee movement | ||||||||
1 | Precuneus, superior parietal cortex, and superior lateral occipital cortex | Right | 964 | <.001 | 18 | −68 | 46 | 3.38 |
2 | Lingual gyrus, precuneus intracalcarine cortex, and supracalcarine cortex | Right | 461 | .023 | 24 | −64 | 12 | 3.33 |
3 | Secondary somatosensory cortex and premotor cortex | Right | 416 | .040 | 60 | 4 | 34 | 3.4 |
Multijoint movement | ||||||||
1 | Precentral gyrus (primary motor cortex) and postcentral gyrus (primary somatosensory cortex) | Right | 380 | <.001 | 6 | −34 | 80 | 6.88 |
Abbreviations: FSLeyes, FSL image viewer for 3-dimensional and 4-dimensional data; FSL, Functional Magnetic Resonance Imaging of the Brain software library.
Brain regions with significant activation set a priori at P <.05 random-effects analysis, random field cluster–corrected for multiple comparisons, and z threshold set at z > 2.3. Anatomical regions identified with FSLeyes and FSL function atlasquery based on peak voxel location and >5% probability of cluster of activity in anatomical region based on the Harvard-Oxford Cortical Structural Atlas17,23–25 (cluster 1 [both movements] and 2) and Juelich Histological Atlas26–28 (cluster 3).
x, y, and z are based on the Montreal Neuroimaging Institute standard brain template coordinates.