Abstract
The purpose of this study was to investigate the effect of somatosensory information of the hip region for control and learning the lateral inclination of the trunk on sitting. Twelve healthy subjects [mean age : 20 years, range : 18-25] were participated in two experiments. In experiment 1, subjects were asked that the head and trunk inclined 15 degrees laterally with and without vibration stimulus (77Hz) to the hip region. As the result, subjects were divided into two groups due to the error from the target angle of trunk inclination when a vibration stimulus was served. However, the error of inclination angle was no relation to the combined pattern of lateral flexion on cervical and lumbar spine. In experiment 2, subjects were given the feedback information about the error from the target angle when vibration stimulus was served and it was examined whether motor learning was recognized using a cross transfer procedure. The result showed that the error decreased in both groups after feedback exercise. These findings suggests that healthy subjects use individual postural control strategy, feedback training is effective for decreasing the error from target angle, however, feedback training may change postural control strategy.
