BIDIMENSIONAL ACCELERATIONS OF LUMBAR VERTEBRAE AND ESTIMATION OF INTERNAL SPINAL LOAD DURING SINUSOIDAL VERTICAL WHOLE-BODY VIBRATION - A PILOT-STUDY

被引：22

作者：

HINZ, B ^{[1
]}

SEIDEL, H ^{[1
]}

BRAUER, D ^{[1
]}

MENZEL, G ^{[1
]}

BLUTHNER, R ^{[1
]}

ERDMANN, U ^{[1
]}

机构：

[1] CENT INST OCCUPAT MED GDR,NOLDNERSTR 40-42,DDR-1134 BERLIN,GER DEM REP

来源：

CLINICAL BIOMECHANICS | 1988年 / 3卷 / 04期

关键词：

Biological Materials--Vibrations - Health Care--Epidemiology;

D O I：

10.1016/0268-0033(88)90044-7

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Accelerations, a, in z- and x-directions were measured on the skin over spinous processes L3 and L4 in three subjects during sinusoidal whole-body vibration (WBV) at 4.5 and 8 Hz and 1.5 and 3.0 ms-2 r.m.s. A method for the prediction of bone accelerations was applied using measurements on the skin. Relative accelerations were calculated by subtracting aL4 from aL3. The phase relations between relative accelerations in the z-direction indicating compression and the absolute maximum az of L4 exhibited marked between-subject variability. One subject was selected for a detailed analysis in the time domain of head, shoulder and upper trunk accelerations, and for comparison with an invasive study. Bidimensional acceleration data confirmed the suggestion that relative motions in the z-direction are combined with angular motions. The resuluts indicate complex internal loads with coupled bending, compression and shear forces.

引用

页码：241 / 248

页数：8