Patients who could perform correctly the exercise in the first grade and acquired a sufficient control over pathological elements were challenged with more complex perceptive tasks. For example, the therapist could ask the patient to distinguish five dif- ferent concentric circles placed on an inclined plane by touching the surface with a finger. The therapist varied the inclination and position of the plane ac- cording to joint movements. In another exercise, the patient was asked to recognize sponges of differ- ent texture placed in correspondence of the inter- scapular space, the medial border of the scapula, the spine of the scapula, the clavicle and the coracoac- romial arch, checking the horizontality of the tablet in the different positions of flexion and extension of the shoulder. During the execution of this task, the patient sat with the elbow flexed and the forearm placed on a laterally swinging support, placed on the floor with rollers