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. 2020 Nov 5;21:217. doi: 10.1186/s12881-020-01149-0

Fig. 2.

Fig. 2

Electroencephalogram: a: abnormal background activity with diffuse low and moderate amplitude slow activity of 1.5-2 Hz. b the posterior head was dominated by frequent multi-focal sharp wave, spike wave, and slow spike wave, with medium voltage suppression of 1–2 s