全身振动对林业作业工人神经行为功能的影响

Effectsofwhole body vibration exposure on neurobehavioralfunction offorestworkers

目的 探讨全身振动对林业作业工人神经行为功能的影响。方法 采用ＷＨＯ推荐的神经行为核心测试组合（ＮＣＴＢ）的７ 项分测验对林业集、运材作业工人的神经行为功能进行测试，并对集、运材司机所承受的全身振动强度进行测试与评价。结果 三种类型集、运材车辆Ｚ轴振动强度均超过了ＩＳＯ２６３１ 的４ 小时暴露极限值。ＮＣＴＢ六项测试得分（简单反应时、数字广度、非利手提转捷度、数字译码、Ｂｅｎｔｏｎ 视觉保留及目标追踪Ⅱ）与对照组相比，均差异显著。结论 在该工作条件下，集、运材工人神经行为功能发生了明显改变，其中某些行为变化与振动强度及接振工龄间存在明显的剂量－

Objective To probe the occupationalharm fuleffectof whole body vibration on neurobehavioralfunction of forestw orkers. MethodsNeurobehavioralfunctions offorestlogging and transporting w orkers w ere tested by Neurobehavio- ralCore TestBattery (NCTB)recom m ended by WHO. And then,Triaxialvibration m easurem ents w ere m ade on forestlog- ging and transporting vehicles.ResultsItwas determ ined thatZ-axisofallvehicleshad vibration levelshigherthan 4hrsexpo- sure lim it recom m ended by ISO 2631. The scores of six tests(Sim ple Reaction Tim e,DigitSpan,Santa Ana Dexterity,Digit Sym bol,Benton VisualRetention and PursuitAim ingⅡ) w erefound to bestatistically significantby com parison w ith those of controlgroup. Conclusions Under this w ork condition, neurobehavioralfunction offorest logging and transporting workers changed obviously, and therew ere obviously does-responserelationships betw een som e neurobehavioralchangesand exposure duration and vibration levels.