Figure 5

Alpha-band activity in the blind group. (A) Topographies of alpha-band activity (10–14 Hz, 400 to 600 ms, marked with black rectangle in (B) with uncrossed (a,b) and crossed hands (d,e) following attended (a,d) and unattended (b,e) stimuli. (c,f,g,h). Difference topographies for attention effects with uncrossed (c) and crossed (f) hands, and for posture effects following attended (g) and unattended (h) stimuli. i. Topography of the interaction between attention and posture. Data are displayed as if stimuli always occurred on the anatomically right hand, so that the left hemisphere is contralateral to tactile stimulation in a skin-based reference frame, independent of posture. Note that, although no effects of posture were evident, topographies are split according to attention and posture to allow direct comparison to sighted participants’ data in Fig. 3A. (B) Time-frequency representation (TFR) of the electrode marked with an asterisk in (A) (approximately FC3/4 in the 10–10 system) following attended (a) and unattended (b) stimuli and time-frequency representations of the statistical difference between attention conditions (c) with significant clusters (p < 0.05) being unmasked. (C) Source reconstruction of alpha-band activity elicited by attended (a) and unattended (b) stimuli and the attention effect (c), view from above (left) and lateral view of the contralateral hemisphere (right), significant clusters are unmasked (CBPT: p = 0.005). The white dashed line denotes the central sulcus. The left (right) hemisphere is contralateral (ipsilateral) to the stimulated hand in all panels. Parts B and C used with permission from ref.⁴⁷.