Supplementary Fig. S4.

(A) Time series of the signal intensity in a split motor unit. The image shows the overlay of two motor units (1 split and one non-split). The graph shows the time series from the highlighted voxels in those motor units (Black – Voxel 1 split Motor Unit 1, Red – Voxel 2 split Motor Unit 1, Green – Voxel 1 Motor Unit 2, and Blue – Background voxel). (B-C) Correlation plots for: (B) Voxel 1 and 2 from within a split motor unit, (C) Voxel 1 from split motor unit against voxel 1 from motor unit 2.