Lumbar spine PS in the transverse plane was evaluated in 292 athletes using three tests: 1) passive and 2) active trunk repositioning, and 3) motion perception threshold.
Three tests were performed: 1) passive and 2) active repositioning to neutral (zero degrees of trunk rotation) and 3) motion perception threshold (MPT).
There were no significant differences in the repositioning errors or motion perception threshold between athletes with and without a history of LBI or between those who did and did not get injured during the follow-up.
As with motion perception, a theoretical threshold mechanism, known as the critical flicker frequency (CFF), can be applied to flicker perception, and this threshold can be used as a proxy to describe the temporal resolution of the visual system.
Figure 4 shows the contrast thresholds for motion perception as a function of eccentricity in the visual field.
These elevated contrast thresholds for motion perception extend far beyond this eccentricity, in conflict with a widespread assumption that the effects of manifest ARM are restricted to the macula.
Monocular contrast thresholds for motion perception were measured along the horizontal meridian in the nasal and temporal visual field at 10°, 20°, 30° and 40° eccentricity and in the temporal visual field additionally at 60°.
In the present study, we determined the contrast thresholds for motion perception far into the periphery of the visual field on the horizontal meridian, up to 40° on the nasal, and 60° on the temporal side.
We know less about CSF but we can assume that species that have 'faster' vision than our own, such as diurnally active flying birds, should also be expected to possess higher CSF thresholds for smooth motion perception.
Non-form-based motion perception was assessed by measuring motion coherence thresholds as described elsewhere (Gilaie-Dotan et al., 2013).
