The sensor of the head
An accessorize very useful during the position  assessment with the Postural Bench is the sensor of the head.
 The sensor, applied on the forehead through an elastic band, allows to get the inclination of the head both in left-right sense and in front-behind sense.
The sensor is very useful for the functional assessment of the cervical interval.
Functional blocks  of this department are highlight both with the angular limitation of the head which with an increase of the pressure exercised on the corresponding blade quadrant ( an angular limitation creates necessarily a rotation to chest level).