From the desire to create a functional system to evaluation and dynamic training in a sitting position, TecnoBody has created Balance Trunk. A product that focuses attention on the motor crossroads between the upper and lower limbs and the head, an area of the body often with poor mobility and affected by trauma. The patient sitting on the Balance Trunk system can control the movement of his trunk in real time and interact with the system in order to acheive a constant visual feedback in real time. The applications of this intervention are numerous both in the neuromotor field, for example in cases of hemiplegia, and in the orthopedic field, in the treatment of scoliosis.