## 5 Conclusions  
Based on the review, it was observed that the issue of the body's response to mediolateral perturbations during free standing is open to further research. The reviewing process uncovered methodological inconsistencies in reviewed studies. The first one was the determination of the onset of perturbation. Some authors [21; 24] defined it as the point at which the perturbation device began to move, but did not touch the subject. The main issue was how perturbations are triggered. The papers described responses to pushes and pulls at both pelvic and shoulder levels. However, none of the authors justified their choice. It is still unclear whether the postural responses to pulling and pushing are the same, even though pulling is more common. Moreover, authors more often chose perturbations at the pelvic level, yet differences between responses to pelvic and shoulder perturbations are unknown, to date. The issue of different magnitudes of perturbation forces was addressed in only one paper [20]; thus, the topic of reactions to different perturbation magnitudes remains open for investigation. Moreover, there were differences in data processing (filtering), that may have influenced the comparison of publications. Regarding the timing of events in the perturbation response, the primary reaction appears to come from the hip joints. However, the knee joints also play a role in the postural response and may be involved in lowering CoM displacement, however, that issue needs further investigation. In mediolateral perturbation-type feedback responses, the fact that CoP motion precedes CoM translation may be important. **Author Contributions:** Conceptualization, M.B. ; methodology, R.B and M.B. ; software, R.B. and M.B. ; validation, M.B. ; formal analysis, R.B. ; investigation, R.B. ; resources, R.B and M.B. ; data curation, R.B. and M.B. ; writing--original draft preparation, R.B. ; writing--review and editing, M.B. ; visualization, R.B. and M.B. ; supervision, M.B. All authors have read and agreed to the published version of the manuscript. **Funding:** This research was funded by the university research project within the strategic direction \"Prevention of motion dysfunctions\"-Evaluation of postural control in response to induced perturbations in different age groups. **Institutional Review Board Statement:** Not applicable. **Informed Consent Statement:** Not applicable. **Data Availability Statement:** Not applicable. **Conflicts of Interest:** The authors declare no conflict of interest. \begin{table}
\begin{tabular}{p{42.7 pt} p{42.7 pt} p{42.7 pt} p{42.7 pt} p{42.7 pt} p{42.7 pt} p{42.7 pt} p{42.7 pt} p{42.7 pt}} \hline \hline  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Time** [ms] & **582.0** & **586.3** & **596.1** & **623.1** & **651.3** & **652.2** & **600.8** \\ \hline \multirow{4}{*}{Event} & Peak of hip flex. torque & Peak power absorbing at minimal lateral pert. & Peak power absorbing at minimal lateral pert. & Knee ext. MHG of knee at minimal lateral pert. & Peak MMC of knee at minimal lateral pert. & Peak MMC of knee at minimal lateral pert. & EMG onset knee at minimal lateral pert. & Knee ext. at minimal lateral pert. \\ \hline