THE IMPACT RESPONSE OF THE SEATED SUBJECT

被引：13
|
作者：
BROMAN, H
POPE, MH
BENDA, M
SVENSSON, M
OTTOSSON, C
HANSSON, T
机构：
[1] UNIV VERMONT,MCCLURE MUSCULOSKELETAL RES CTR,DEPT ORTHOPAED SURG,BURLINGTON,VT 05405
[2] UNIV VERMONT,VERMONT REHABIL ENGN CTR,BURLINGTON,VT 05405
[3] SAHLGRENS UNIV HOSP,DEPT ORTHOPAED,S-41345 GOTHENBURG,SWEDEN
[4] CHALMERS UNIV TECHNOL,DEPT APPL ELECTR,S-41296 GOTHENBURG,SWEDEN
来源：
JOURNAL OF ORTHOPAEDIC RESEARCH | 1991年 / 9卷 / 01期
关键词：
IMPACT; VIBRATION; LUMBAR SPINE; RESONANCE;
D O I：
10.1002/jor.1100090118
中图分类号：
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学（修复外科学）];
学科分类号：
摘要：
An impact method for establishing the dynamic response of the seated subject is introduced. The method employs a pendulum to apply the impact to the suspended seat. Pins are placed in the spinous process at L3. Highly reproducible results are obtained. The results were not affected by the amplitude of impact, implying a linear system. A marked peak of transmissibility is found in the 4-5 Hz range and an attenuation peak is found close to 8 Hz. Both muscle contraction and postural changes affect the dynamic response. A relaxed posture shows greater gain and attenuation peaks. A valsalva stiffens the system and reduces the effective damping. The vertical response of the body probably shows in the 5-6 Hz peak, while the rotational response is probably encompassed in the 8 Hz attenuation peak.
引用
收藏
页码：150 / 154
页数：5
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