An apparatus can be used in the detection and correction of the posture of a persons anatomy and particularly, although not necessarily exclusively, the posture of a persons neck The apparatus includes a device to be worn, such as at the rear of the neck of a person, and the device includes a frame having first and second ends and at least one sensor to detect the tilt angle of a predefined plane and processing means to determine whether the detected tilt angle is within a predetermined range of acceptable positions The apparatus, when worn, has a plurality of contact points with the wearer.