From: Systematic changes in position sense accompany normal aging across adulthood
Coordinate frame | Parameter | Abrv | Units | Definition |
---|---|---|---|---|
Hand-coordinates | Variability | Var | cm | Mean trial-by-trial variability of the active hand in x, y, and xy coordinates. |
Systematic shift | Shift | cm | Systematic errors between the mean x and y positions of the active and passive hands. | |
Absolute error | AE | cm | Absolute errors between the mean x and y positions of the active and passive hands. | |
Spatial Cont/Exp | C/E | — | Ratio of: i) mean spatial area enclosed by the active hand to ii) mean spatial area of enclosed by the passive hand. | |
Joint-coordinates | Variability | Var | deg | Mean trial-by-trial variability of the shoulder and elbow angles of the active arm. |
Systematic shift | Shift | deg | Systematic errors between the shoulder and elbow angles of the active and passive arms. | |
 | Absolute error | AE | deg | Absolute errors between the shoulder and elbow angles of the active and passive arms. |