Fig. 6.

Trend of interhemispheric coherence between bilateral S1FL regions pre- and post-PTI stroke induced in the right hemisphere S1FL region. Here, Figs. 6(a) and 6(b) indicate coherence changes in the bilateral S1FL regions [Ch3 and Ch4 (shown in Fig. 1(b)], and Fig. 6(c) shows ADR changes of Ch4 in iS1FL region. The results were calculated for electrode Ch3 and Ch4, because these were closely associated with the corresponding PTI stroke location. The coherence in the alpha and delta bands was calculated because these frequencies are indicative of injury state.⁴⁷ The results indicate significant recovery of alpha and delta coherence following bilateral 2-mA stimulation (group 3) ($p<0.05$). Also, we can observe that the recovery of coherence values after unilateral stimulation with 2 mA (group 1) was better than 4 mA (group 2). Bilateral 4-mA stimulation was counterproductive and resulted only in decreased coherence values. ADR values followed the same trend as coherence and it should be noted that ADR is a positive recovery indicator for cerebral injury. Recovery of ADR in group 3 was significantly better than any other experimental group at the end of treatment ($p<0.05$).