Data for: Interhemispheric asymmetry of network connecting between frontal and temporo-parietal cortices: a cortico-cortical evoked potential study

Figure 1
(a) Stimulation parameter. Repetitive square-wave electric currents of alternating polarity with a pulse width of 0.3 msec and a frequency of 1 Hz were delivered through a pair of electrodes for 50 sec. (b) Amplitude and latency of the N1 component of cortico-cortical evoked potentials (CCEPs). A line was drawn from the N1 peak to the P2 peak, and the amplitude was then measured as the height of a vertical line drawn between these peaks. The latency of N1 was measured from the time of stimulation to the N1 peak.
(c) A schematic depiction of CCEP distribution in the stimulation of the pars opercularis/pars triangularis (pO/pT) in all patients.
Figure 2
CCEP responses recorded from the language-dominant hemisphere in 3 patients (Patient 1, 12, 17). A pair of black circles represents the stimulation sites and the white circles indicate the area in which cortico-cortical evoked potentials (CCEPs) were recorded. The size of the circle shows the magnitude of the obtained potential.
Figure 3
CCEP responses recorded from the non-dominant hemisphere in 3 patients (Patient 20, 21, 25).
Figure 4
Box plots of CCEP amplitude and latency in the left (language-dominant side) and right hemisphere (non-dominant side). The amplitudes of the CCEPs were significantly larger on the dominant side than on the non-dominant side (P = 0.013). On the other hand, the latencies were not significantly different between sides (P = 0.604). n.s.: not significant