Abstract
A new dynamic equilibrium test of the step-rotation method was devised to determine the labyrinthine function during programmed movement.
This method consisted of a combination of one-four rotation and steppings. Each active rotation was performed in two steps; 90° rotation was made with the first step in I-V method, with the second step in method VI.
Rotation and stepping were designed in the following manner:
1) Method I-IV (90°-360°)
1-,
1-2-, 1234, 5678×4 times
1-2-3-,
1-2-3-4-,
2) Method V (Combined)
(1-, 12345678)-(1-2-, 12345678)-
(1-2-3-, 12345678)-(1-2-3-4-, 12345678)
3) Method VI (Rhythm)
(1234) (1234) (----)×12-16 times
=rotation
1) Latent deviation often appears more clearly with these programmed movements.
2) Effects of active rotation are somewhat different from those of passive rotation, as there are prolonged rotatory after-effects.
3) Even in cases of latent labyrinthine deviation with negative results of the examination, patients often complained of a sense of difficulty with the active rotation in the direction against latent labyrinthine deviation.
4) The methods of I-V may be useful for estimating the healing process of vertigo. These methods may also be used as aptitude tests for sportsmen and/or pilots.
