Nintendo Wii remote controllers fixed to a mechanical frame and an IR beacon, mounted on the head were also used to measure the head posture.
The standard deviation of 15 repeated measurements ranged from 0.56° to 2.70° .
The systems are also usually quite large and difficult to transport.
We find that it is appropriate for measurements of the head orientation with respect to the trunk for the characterization of the cervical dystonia. Head orientation measurement techniques are mainly based on a combination of different gyroscopes, accelerometers and electronic compasses.One such system is based on a three-axis accelerometer and a resonator gyroscope mounted on a hard hat .comparison was done on the basis of an experiment with the mannequin and a healthy male (aged 29).These results show that only the difference between flexion/extension measured angles was statistically significant.An innovative handheld 3D apparatus has been developed for non-invasive and fast 3D shape measurements.
It is based on the triangulation principle in combination with fringe projection.Knowing the orientation of the head is important in many fields, including medicine.Many methods and measuring systems exist, but usually they use different markers or sensors attached to the subject’s head for head orientation determination.This paper presents a novel method that enables the measurement of the head posture relative to the trunk.The method has been developed with the aim of characterizing the effects of cervical dystonia, a disease which affects the patient’s head posture and the range of movement as well as their quality of life in many other ways .The presented method utilizes optical 3D measurements of the upper trunk and head to measure these effects.