Trunk sensor
Another particularly innovative feature is the possibility of applying the TK Sensor trunk sensor to all the Pro-Kin line systems.
The TK Sensor, applied to the patient’s trunk, is a biaxial clinometer capable of
detecting trunk oscillations in anterior posterior and right-left directions

Assessing control of the trunk during proprioceptive exercises in erect patient position.Trunk stability during proprioceptive exercises in erect patient position, indicates that the subject has good peripheral control (ankle, knee, hip) and does not require any postural compensation at higher levels.