Force platform for stabilographic studies

An analysis is made in the paper of a triangular force platform included in a computer system for postural analysis using Pravets 8M personal computer. The tensions generated in steel rings in the three corners of the platform, proportional to the moments of the forces with spontaneous fluctuations of the position of the centre of the force exercised by the experimental subject on the platform, are registered and amplified using three identical amplifying channels comprising tensotransducer, preamplifier and second-order low-frequency filter. The output signals of the three amplifying channels are fed to an analogue decoder generating an electrical signal proportional to the weight and to the anterior-posterior and lateral components of the force. The signals from the outputs of the decoder can be used for introducing visual feedback about postural stabilization. The regulations of the platform are maximally simplified so as to be used in clinical research.