An assembly of devices designed to test a patient's sensory, voluntary, and/or reflexive motor control of balance and mobility providing biofeedback for rehabilitation of balance problems. The patient is placed on a dedicated platform equipped with built-in sensors, transducer and/or force plates that register movement when he/she adjusts his/her centre of gravity (COG) alignment according to the doctor's instructions, or, the platform provokes destabilizing perturbations and the output is recorded to a computer where they are graphically reproduced. This device is used, e.g., for motor control test (MCT), posture studies, balance, mobility training, and/or sense of equilibrium studies.