Table 1 Description of sensory organization test conditions and ratios
Test | Description |
|---|---|
Condition 1 | Eyes open, fixed visual environment and support surface |
Condition 2 | Eyes closed, fixed visual environment and support surface |
Condition 3 | Eyes open, moving visual environment and fixed support surface |
Condition 4 | Eyes open, fixed visual environment and moving support surface |
Condition 5 | Eyes closed, fixed visual environment and moving support surface |
Condition 6 | Eyes open, moving visual environment and moving support surface |
SOM | Ratio of scores for conditions 2:1: low score indicates poor somatosensation (e.g., peripheral neuropathy) |
VIS | Ratio of scores for conditions 4:1: low score indicates that vision and vestibular senses are insufficient to maintain equilibrium when somatosensory information is unreliable |
VEST | Ratio of scores for conditions 5:1: low score indicates that vestibular sense alone is insufficient when vision is absent and somatosensory information is unreliable |
PREF | Ratio of the sum of conditions 2,5: sum of conditions 3,6: low score indicates that unreliable visual input is worse than none, suggests visual dependence for postural equilibrium |