TABLE 2.
List of considered parameters (definitions and corresponding acronyms) for indifferent orthostasis (IO) vs. instinctive self-correction (ISCO) comparison and summarizing indexes.
| Global summarizing index | Parameters |
Specific summarizing indexes | ||
| Acronyms | Descriptions | Definitions | ||
| GPI Global postural index | |ASO| (mm) | |Average frontal spinal offsets| | The ASO is the mean of the horizontal distances in the frontal plane of each labeled spine landmark respect to the vertical axis passing by S3; Absolute value of the average to disregard the side | FPI Frontal postural index |
| |AGO| (mm) | |Average frontal global offsets| | The AGO is the mean of the horizontal distances in the frontal plane of each labeled spine landmark respect to the vertical axis passing through the middle point between heels; Absolute value of the average to disregard the side | ||
| |ΔASIS| (mm) | |ΔAnterior superior iliac spine| | Absolute ASIS height difference in frontal plane | ||
| |ΔPSIS| (mm) | |ΔPosterior superior iliac spine| | Absolute PSIS height difference in frontal plane | ||
| CA1; CA2 (degrees) | 1°Cobb angle; 2°Cobb angle | Cobb angles of the two main “spinal deformities” found in the frontal plane | ||
| |PT (mm)| | |Pelvis torsion| = |(ΔASIS-ΔPSIS)| | Rotation of the right with respect to the left innominate bone. Rotations are intended around a horizontal axis running through the symphysis pubis. Absolute value to disregard the side | SPI Sagittal postural index | |
| ASO SG (mm) | Average sagittal spinal offsets | The ASO SG is the mean of horizontal distances in the sagittal plane of each labeled spine landmark respect to the vertical axis passing by S3; Negative value represent forward leaning | ||
| AGO SG (mm) | Average sagittal global offsets | The AGO SG is the mean of horizontal distances in the sagittal plane of each labeled spine landmark respect to the vertical axis passing through the middle point between heels; Negative value represent forward leaning | ||
| SA (degrees) | Sacral angle | The inclination of S1-S3 line with respect to the vertical line | ||
| TKA (degrees) | “Thoracic” Kyphosis angle | Kyphosis and lordosis are correctly identified following spine curvature spatial changes at inflection points, and so limit vertebrae are not strictly bounded to the specific anatomical region | ||
| LLA (degrees) | “Lumbar” Lordosis angle | |||
| |ΔUL| (%BW) | |ΔUnderfoot load| | Left vs. right sides body weight (BW) percentage difference. Absolute value to disregard the side | ||