**4. Conclusions**

The following conclusions can be drawn from the evidence collected:

At least four types of periodic or quasi-periodic phenomena exist in the PAT under study, which are described below:

**Figure 7.**

*Estimation of periodic or quasi-periodic instabilities for DYT1. Above, estimation in the time domain. Below, estimation in the frequency domain.*

• In OPs 20 (runaway) and 21 (next to runaway), an in-phase phenomenon is detected, perhaps a surge with frequency coefficients of 0.776 and 0.758, respectively. Regarding the total instability, the disturbance magnitude of this phenomenon reaches 13.2 and 12.9% in DYT1 and 15.9 and 15% in DYT2, respectively.
