Abstract
In the present study, the relations between the biased tonicity of the body effected by the tilt of the body, the bias center of gravity, chronic tension and vertical judgments (visual, tactual) in cerebral palsied children (N=10, 7-10yrs.) and adolescents (N=10, 15-29yrs.) were investigated. The main results were summarized as follows: relations were found between the direction that showed relatively more chronic tension in the body, the direction of its tilt and the direction of the apparent visual verticality: all these results sustained the Sensory Tonic Field Theory by Werner (1952). No relations were found between the bias of center of gravity and the vertical judgments. And Ss having more chronic tension and poorer standing stability showed more tilt of apparent verticality. Taking account of these results, the relations between the biased tonicity of the body effected by chronic tension and the vertical judgments were discussed.
