## 3 Results
Here, the authors intended to explore the performance of the BMI and the effect on SoO and SoA when a BMI used neural activity from the sensorimotor areas (MI-BMI) or activity from the visual areas (SSVEP-BMI). Although the performance was slightly higher for the MI-BMI group, this difference was not statistically significant. Significative higher ratings of SoO and SoA were found in the MI-BMI group. In all studies, subjective questionnaires (7-point or 11-point Likert rating) were used to measure embodiment variables (also see Table 4 for details). One study adopted a classification from 0 to 100 points [18]. In only two studies [19; 37], the answers were given by choosing \"yes\" or \"no\". However, in one of these [37], the authors added a second request to rank from 0 to 100 on the degree of certainty in the given answer. The number of questions used in the questionnaires was also very variable. Of the analyzed studies, the number of questions to assess SoE variables ranged from 1 to 26. Differences in the nomenclature of the various SoE components were present in the studies analyzed. As we have followed the classification proposed by [PERSON] et al. (2012), it was necessary to specifically analyze all the questions posed in each of the studies to be able to fit them into the scope of SoO, SoL, or SoA (see Table 1). It was found that there is great heterogeneity in the terminology used. For example, in some studies, the authors used the term SoE when referring to \"It was as if the virtual body was my body\" and the term sense of control when referring to \"I felt in control of avatar's actions\" [18; 46]. However, according to [PERSON] et al., 2012, this should be included in the SoO and SoA categories, respectively. Among the 20 studies included in this review, 16 had SoO questions, 14 had SoA questions, and 8 studies had SoL questions in their questionnaires. Only five studies had questions covering the three components of the SoE. Other combinations of SoE components can be analyzed in Figure 2.  
Figure 2: Number of studies per SoE dimension assessed. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Study** & **Neural Signal** & **Feedback** & **N Modalities** & \begin{tabular}{c} **Compages** \\ **Seminal** \\ **Modalities** \\ \end{tabular} & **BM Classes** & **Sof Evaluation** & \begin{tabular}{c} **BM5** \\ **(Mean/Median)** \\ \end{tabular} & **Embediment and BMI** & **Conduction** \\ \hline [PERSON] et al., & 2009 [34] & EEG-based via Md & Visual & 1 & No & 2 & [PERSON] and [PERSON], 1998 & N/A & 3M Visual & 1 \\ \hline [PERSON] et al., 2011 [5] & EEG-based via & Visual & 1 & No & 3.0, R, [PERSON] & [PERSON] et al., 1998 [39] & N/A & 500 ms/ frequency EDD \\ \hline \multirow{4}{*}{\
\begin{tabular}{} \end{tabular} } & EEG-based via & Visual & 1 & No & 3.0, R, [PERSON] & [PERSON] et al., 1998 [39] & N/A & 500 ms/ frequency EDD \\ \cline{2-7}  & SVM & & & & & & & & & \\ \cline{2-7}  & & & & & & & & & & & \\ \cline{2-7}  & & & & & & & & & & & \\ \cline{2-7}  & & & & & & & & & & & \\ \hline \hline \end{tabular}
\begin{tabular}{} \end{tabular}
\end{table} 
Table 4: Embodiment and BMI evaluation. \begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline
\begin{tabular}{c} **Stich**  
It is also common in studies related to SoE to include measures of disownership, defined as the experience that a body part does not belong to the subject [61]. In most cases, these measures were focused on assessing the participant's awareness of their actual body parts. An example of this is the study by [PERSON] and [PERSON] (2018) when the participants were asked about the sense of proprioception related to awareness of the position of their own hands [17]. In two other studies, the authors were interested in assessing the influence of the apparatus illusion on the real body parts. In the work of [PERSON] et al.