Figure 4. Intra-hemispheric coherences following a minor stroke.

The mean intra-hemispheric coherence spectra in the subacute (n = 10) and chronic (n = 9) stages of stroke patients vs. healthy controls (n = 11). In contrast to the increased synchronization of slower alpha in the ipsi-lesional hemisphere (D–F; p ≤ 0.05) in the subacute and chronic stages of stroke patients vs. controls, the contra-lesional hemisphere exhibited a generalized but transient (only in the subacute stage) increase in theta synchronization (A–C; p ≤ 0.05) with no alteration to alpha synchronization. Arrows indicate the most consistent and significantly altered coherences in the corresponding group (the subacute or chronic stage of stroke vs. the control).