中华航空航天医学杂志
中華航空航天醫學雜誌
중화항공항천의학잡지
CHINESE JOURNAL OF AEROSPACE MEDICINE
2010年
4期
251-255
,共5页
金朝%卫晓阳%李宝辉%徐艳%王全%颜桂定%邓略%耿喜臣%王雷%高原%孙喜庆
金朝%衛曉暘%李寶輝%徐豔%王全%顏桂定%鄧略%耿喜臣%王雷%高原%孫喜慶
금조%위효양%리보휘%서염%왕전%안계정%산략%경희신%왕뢰%고원%손희경
头部%颈%防护装置%肌电描记术
頭部%頸%防護裝置%肌電描記術
두부%경%방호장치%기전묘기술
Head%Neck%Protective devices%Electromyography
目的 通过观察受试者使用飞行员头颈部防护装置(neck protection device,NPD)时颈部表面肌电信号(surface electromyographic signal,sEMG)变化探讨该装置的防护效果.方法 15名男性志愿者,在不戴装备、仅戴保护头盔、同时戴保护头盔和飞行员头颈部防护装置3种情况下,分别测量颈椎前屈0°、10°、20°、30°、40°、50°和最大限度时的sEMG;并通过在头盔下颏带上悬挂1个2.5 kg配重的方式模拟+Gz过载时颈部的受力情况,记录此时在有、无颈部防护装置情况下颈部前屈到最大限度时的sEMG;计算振幅均方根值(root mean square,RMS).结果 受试者颈部在不戴任何装备及仅戴飞行保护头盔两种情况下做前屈时,不同前屈角度时的体表肌电值差异有统计学意义(F=160.454、129.563,P＜0.01).与头部处于中和位(颈前屈0°)时相比,受试者不戴装备时颈前屈至30°时的sEMG达最大值(5.99±1.99)mV,戴飞行保护头盔颈前屈至40°时的肌电信号达最大值(10.14±3.80)mV.戴飞行保护头盔后颈部前屈20°～50°时的sEMG大于不戴装备时,且差异有统计学意义(P＜0.05).头盔下悬挂配重后sEMG进一步增大.在同时戴飞行保护头盔及NPD后,无论是颈前屈至各种角度还是增加配重后前屈至50°,颈肌sEMG与不戴装备相比差异均无统计学意义.结论 受试者在戴飞行保护头盔及悬挂配重时作颈前屈会导致颈部肌电活动强度显著增强,而NPD可显著减轻两种情况下时的颈肌负荷.
目的 通過觀察受試者使用飛行員頭頸部防護裝置(neck protection device,NPD)時頸部錶麵肌電信號(surface electromyographic signal,sEMG)變化探討該裝置的防護效果.方法 15名男性誌願者,在不戴裝備、僅戴保護頭盔、同時戴保護頭盔和飛行員頭頸部防護裝置3種情況下,分彆測量頸椎前屈0°、10°、20°、30°、40°、50°和最大限度時的sEMG;併通過在頭盔下頦帶上懸掛1箇2.5 kg配重的方式模擬+Gz過載時頸部的受力情況,記錄此時在有、無頸部防護裝置情況下頸部前屈到最大限度時的sEMG;計算振幅均方根值(root mean square,RMS).結果 受試者頸部在不戴任何裝備及僅戴飛行保護頭盔兩種情況下做前屈時,不同前屈角度時的體錶肌電值差異有統計學意義(F=160.454、129.563,P＜0.01).與頭部處于中和位(頸前屈0°)時相比,受試者不戴裝備時頸前屈至30°時的sEMG達最大值(5.99±1.99)mV,戴飛行保護頭盔頸前屈至40°時的肌電信號達最大值(10.14±3.80)mV.戴飛行保護頭盔後頸部前屈20°～50°時的sEMG大于不戴裝備時,且差異有統計學意義(P＜0.05).頭盔下懸掛配重後sEMG進一步增大.在同時戴飛行保護頭盔及NPD後,無論是頸前屈至各種角度還是增加配重後前屈至50°,頸肌sEMG與不戴裝備相比差異均無統計學意義.結論 受試者在戴飛行保護頭盔及懸掛配重時作頸前屈會導緻頸部肌電活動彊度顯著增彊,而NPD可顯著減輕兩種情況下時的頸肌負荷.
목적 통과관찰수시자사용비행원두경부방호장치(neck protection device,NPD)시경부표면기전신호(surface electromyographic signal,sEMG)변화탐토해장치적방호효과.방법 15명남성지원자,재불대장비、부대보호두회、동시대보호두회화비행원두경부방호장치3충정황하,분별측량경추전굴0°、10°、20°、30°、40°、50°화최대한도시적sEMG;병통과재두회하해대상현괘1개2.5 kg배중적방식모의+Gz과재시경부적수력정황,기록차시재유、무경부방호장치정황하경부전굴도최대한도시적sEMG;계산진폭균방근치(root mean square,RMS).결과 수시자경부재불대임하장비급부대비행보호두회량충정황하주전굴시,불동전굴각도시적체표기전치차이유통계학의의(F=160.454、129.563,P＜0.01).여두부처우중화위(경전굴0°)시상비,수시자불대장비시경전굴지30°시적sEMG체최대치(5.99±1.99)mV,대비행보호두회경전굴지40°시적기전신호체최대치(10.14±3.80)mV.대비행보호두회후경부전굴20°～50°시적sEMG대우불대장비시,차차이유통계학의의(P＜0.05).두회하현괘배중후sEMG진일보증대.재동시대비행보호두회급NPD후,무론시경전굴지각충각도환시증가배중후전굴지50°,경기sEMG여불대장비상비차이균무통계학의의.결론 수시자재대비행보호두회급현괘배중시작경전굴회도치경부기전활동강도현저증강,이NPD가현저감경량충정황하시적경기부하.
Objective To evaluate the protection effect of a neck protection device (NPD) by analyzing neck muscle surface electromyographic signal (sEMG) for pilot.Methods Fifteen male subjects were tested under three conditions that were with no equipment, wearing helmet, and wearing helmet plus NPD respectively.At first, subjects flexed their necks from 10° to ultimate degree.Then subjects performed same maneuvers with helmet or with helmet and NPD when a 2.5 kg extra weight was appended on chin belt of helmet for simulating +Gz load.Neck sEMG was measured in all tests and root mean square (RMS) of amplitude was calculated.Results When flexing without equipment or only with helmet subjects' neck sEMG showed significant difference (F-160.454, 129.563, P＜0.01).For the subjects without any equipment, their neck sEMG appeared peak (5.99±1.99) mV as flexing to 30° when referenced to neutral position of head.But for the subjects with helmet the neck sEMG peak appeared at 40° flexing (10.14±3.80) mV.Within the 20° to 50° flexing range, helmet resulted in significantly higher neck sEMG comparing to no load condition (P＜0.05).Extra weight drove the incensement of neck tension.However, there was no significant difference in neck sEMG activity when flexed to any degree with helmet and NPD or to 50° with the extra weight.Conclusions Neck sEMG significantly increases when subject flexed with helmet or with an extra weight.The NPD could abate subject's tension on neck when wearing helmet.
