tailieunhanh - Báo cáo khoa hoc:" Kinematic aspects of trunk motion and gender effect in normal adults"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Kinematic aspects of trunk motion and gender effect in normal adults | Chung et al. Journal of NeuroEngineering and Rehabilitation 2010 7 9 http content 7 1 9 l dl JOURNAL OF NEUROENGINEERING NCR AND REHABILITATION RESEARCH Open Access Kinematic aspects of trunk motion and gender effect in normal adults Chin Youb Chung1 Moon Seok Park1 Sang Hyeong Lee1 Se Jin Kong2 Kyoung Min Lee1 Abstract Background The purpose of this study was to analyze kinematic trunk motion data in normal adults and to investigate gender effect. Methods Kinematic trunk motion data were obtained for 20 healthy subjects 11 men and 9 women age from 21 to 40 years during walking a 9 m long lane at a self selected speed namely motions in the sagittal tilt coronal obliquity and transverse rotation planes which were all expressed as motions in global relative to the ground and those in pelvic reference frame relative to pelvis . tilt G obliquity G rotation G tilt P obliquity P rotation P . Results Range of tilt G obliquity G and rotation G showed smaller motion than that of tilt P obliquity P and rotation P respectively. When genders were compared female trunks showed a 5 degree more extended posture during gait than male trunks p which appeared to be caused by different lumbar lordosis. Ranges of coronal and transverse plane motion appeared to be correlated. In gait cycle the trunk motion appeared to counterbalance the lower extremity during swing phase in sagittal plane and to reduce the angular velocity toward the contralateral side immediate before the contralateral heel strike in the coronal plane. Conclusions Men and women showed different lumbar lordosis during normal gait which might be partly responsible for the different prevalence of lumbar diseases between genders. However this needs further investigation. Background Trunk motion has not attracted much attention from those interested in three dimensional gait analysis because this motion is relatively small and is generally thought to be passive and to depend on lower .