Arm-deviation induced by rotatostimulation was studied by arm-kinetography, which was reported by this author in Equilibrium Research, vol, 41 (1), 1982. From the testing results of 36 patients with vestibular disorders, pathological patterns were classified into the following six types:
1) A hyporeaction type was observed in cases of bilateral peripheral vestibular disorders.
2) A hyperreaction tipe was observed in cases of brainstem lesions,
3) A directional preponderance type was observed in cases of unilateral peripheral vestibular disorders.
4) A plateau formation type was observed in cases of spino-cerebellar degeneration.
5) A slow reaction type was observed in cases of post-traumatic brainstem lesions.
6) A dysmetria and ataxia type was observed in cases of cerebellar disturbance.
