Table 2 Global and structural posturographic parameters
Category | Parameters | Description |
|---|---|---|
COP_v | Average value of COP velocity in ML or AP direction | |
Global (Time domain) | COP_SD | Standard deviation of COP position in ML or AP direction |
COP_PEA | Prediction ellipse area that encompasses 95% of COP points | |
COP_Rg | Range of COP position in ML or AP direction | |
COP_SP | Sway Path of COP position in ML or AP direction | |
Global (Frequency domain) | PSD_FB80 | Integrated area of PSD at the frequency band that contains up to 80% of PSD in ML or AP direction |
PSD_LPeak | Peak-value of PSD at a low-frequency band (0.01–0.5 Hz) in ML or AP direction | |
PSD_HPeak | Peak-value of PSD at a high-frequency band (0.5-1.2 Hz) in ML or AP direction | |
PSD_LSlope | Slope of the PSD regional regression line at a low-frequency band (0.01–0.5 Hz) in ML or AP direction | |
PSD_HSlope | Slope of the PSD regional regression line at a high-frequency band (0.5-1.2 Hz) in ML or AP direction | |
PSD_CP | Crossover point of the two PSD regional regression lines | |
Structural | SDA_SSlope SDA_LSlope | Slope of stabilogram at short-term region on log-scale SDA |
Slope of stabilogram at long-term region on log-scale SDA | ||
SDA_CP | Crossover point of the short-term and long-term lines regional regression lines | |
SDP_MT | Population mean value of the time interval between successive peaks (MT) in sway density plot | |
SDP_MP | Population mean value of the peaks (MP) in the sway density plot | |
SDP_MD | Population mean value of the distance between successive peaks (MD) in the sway density plot |