Scenario | Variable | Description |
---|---|---|
Trunk forward/backward | ||
S1 | \(\Delta H^t\) | Observed changes in patient’s head position, detect through patient’s head area, \(H^t\) (\(t>1\)) |
S2 and S3 | \(a^t(p_8^1,p_1^1,p_1^t)\) \(\wedge\) \(\Delta x^t(p_1^t,p_1^1)\) | Spine angular and linear displacements |
Trunk rotation | ||
S1 | \(a^t(p^1_{2},p^1_{1},p^t_{2})\) \(\wedge\) \(a^t(p^1_{5},p^1_{1},p^t_{5})\) | Simultaneous angular displacements of both shoulders |
S2 | \(\Delta x^t(p^t_{2/5},p^t_{1})\) | Shoulder displacement regarding joint 1 in \({}^BX\) |
S3 | \(| \Delta d^t(p^t_{2},p^t_{5})|\) | Absolute changes in the observed chest length |
Shoulder elevation | ||
S1 | \(a^t(p^1_{2/5},p^1_{1},p^t_{2/5})\) | Shoulder elevation angle |
S2 and S3 | \(\Delta y^t(p^t_{2/5},p^t_{1})\) | Shoulder displacement regarding joint 1 in Y |
Trunk tilt | ||
S1 | \(a^t(p^1_{8},p^1_{1},p^t_{1})\) | Spine angular displacement |
S2 and S3 | \(| \Delta H^t|\) | Absolute changes in patient’s head size |