Table 1.
Variables measured with Ethovision XT 14.
| Variable | Body point | Filter—segment | Measurement | Unit |
|---|---|---|---|---|
| Movement | Center point | No filter—all data | Duration not moving | % |
| Mobility state | Whole body | No filter—all data | Duration highly mobile | % |
| Mobility state | Whole body | No filter—all data | Duration mobile | % |
| Mobility state | Whole body | No filter—all data | Global mobility (sum of Highly mobile and Mobile) | % |
| Mobility state | Whole body | No filter—all data | Duration Immobile | % |
| Acceleration state (body) | Center point | No filter—all data | Frequency for High and Low Accelerations | |
| Acceleration state (head) | Nose point | No filter—all data | Frequency for High and low Accelerations | |
| Positive acceleration | Center point | No filter—all data | Mean | cm/s2 |
| Negative acceleration | Center point | No filter—all data | Mean | cm/s2 |
| Relative body angle | Center, nose and tail base point | MDM—all data | Mean | ° |
| Velocity (head) | Nose point | MDM—all data | Mean and Maximum | cm/s |
| Cephalic nystagmus (bobbing) | Nose point | MDM—all data | Frequency of velocity for the nose point ≥ 100 cm/s | |
| Distance moved | Center point | MDM—when moving | Total | cm |
| Velocity (body) | Center point | MDM—when moving | Mean and Maximum | cm/s |
| Body axis rotation CW | Center to nose point | MDM—when moving | Frequency | |
| Body axis rotation CCW | Center to nose point | MDM—when moving | Frequency | |
| Body points rotation CW | Center point | MDM—when moving | Frequency | |
| Body points rotation CCW | Center point | MDM—when moving | Frequency | |
| Absolute meander | Center point | MDM—when moving | Mean | °/cm |
CW, clockwise (contralesional)°; CCW, counterclockwise (ipsilesional); MDM, Minimal Distance Moved.