[Studies on the cervical spine: evaluation of the muscular strength and range of active movements].

Results of examinations of active motions and muscle force of normal cervical spine in 38 metal-industry manual workers have been presented. Comparative values have been obtained which may promote evaluation of pathological changes within the cervical spine. Some correlations have been found between the range of active motions and the force in the following motions: backward bending, head bending to the right, head bending to the left. It has been also observed that the difference between the mean force during forward bending and the mean force during backward bending is statistically significant at the significance level of 0.95.