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. 2019 Sep 30;19(19):4246. doi: 10.3390/s19194246

Figure 9.

Figure 9

Power spectral density and Inter-cycle variation of gyroscope signal frequency measured at the head of a patient with cervical dystonia. (a) Patient-1, without head tremor (from A1 group); (b) Patient-28, with head tremor (from B1 group).