Moreover, the extension-flexion ratio, a parameter to judge voluntary movements without body weight support, revealed no significant differences among the experimental groups of mice, although L1 overexpressing SENAs showed a tendency towards improved motor function when compared to wild-type SENAs and sham-injected PBS three and six weeks after injury (Fig. 1D, H).
At 90° knee flexion, the ratio increased from 3.38 to 4.68.
* FRR = Flexion relaxation ratio (the amount of electrical activity in lumbar extensor muscles during flexion compared with end of flexion range of movement).
The flexion relaxation ratio (FRR) was also calculated by dividing RMS activity measured during movement, either in the flexion (FRRF) or extension (FRRE) phases, by the RMS while relaxed (full flexion phase).
In contrast, non-active controls have higher strength during trunk extension and balanced dominant/non-dominant lateral flexion strength ratios [7] [9].
Data reduction: In order to quantify the degree to which the FRP is present, two different forms of a flexion-relaxation ratio (FRR) are used [ 31, 32].
Four input variables (thorax flexion angle, lumbar/pelvis ratio, load magnitude, and load position) and four model responses (L4 L5 and L5 S1 disc compression and anterior posterior shear forces) are considered.
A strong positive correlation (R = 0.72) was found between the flexion: extension strength ratio at the hip in participants with SCI and the amount of BWS required to complete the overground walking session; the higher the flexion: extension ratio, the more support that was required.
Further investigation into the flexion: extension strength ratio at both the hip and knee determined that a positive correlation existed between flexion: extension strength at the hip (primarily due to a reduction in hip extensor isometric strength) and the percentage of BWS required to complete an overground walking session using the ZeroG.
For horses having RS and lameness after flexion test, the risk ratio for culling was 2.6 times higher than for horses without these findings and the risk ratio for culling because of HLL was 10 times higher (Table 7).
