Zużewicz Krystyna, Roman-Liu Danuta, Konarska Maria, Bartuzi Paweł, Matusiak Krzysztof, Korczak Dariusz, Lozia Zbigniew, Guzek Marek
Department of Ergonomics, Central Institute for Labour Protection, National Research Institute, Warszawa, Poland,
Int J Occup Med Environ Health. 2013 Oct;26(5):710-23. doi: 10.2478/s13382-013-0148-5. Epub 2014 Jan 25.
The aim of the study was to verify whether simultaneous responses from the muscular and circulatory system occur in the driver's body under simulated conditions of a crash threat.
The study was carried out in a passenger car driving simulator. The crash was included in the driving test scenario developed in an urban setting. In the group of 22 young male subjects, two physiological signals - ECG and EMG were continuously recorded. The length of the RR interval in the ECG signal was assessed. A HRV analysis was performed in the time and frequency domains for 1-minute record segments at rest (seated position), during undisturbed driving as well as during and several minutes after the crash. For the left and right side muscles: m. trapezius (TR) and m. flexor digitorum superficialis (FDS), the EMG signal amplitude was determined. The percentage of maximal voluntary contraction (MVC) was compared during driving and during the crash.
As for the ECG signal, it was found that in most of the drivers changes occurred in the parameter values reflecting HRV in the time domain. Significant changes were noted in the mean length of RR intervals (mRR). As for the EMG signal, the changes in the amplitude concerned the signal recorded from the FDS muscle. The changes in ECG and EMG were simultaneous in half of the cases.
Such parameters as mRR (ECG signal) and FDS-L amplitude (EMG signal) were the responses to accident risk. Under simulated conditions, responses from the circulatory and musculoskeletal systems are not always simultaneous. The results indicate that a more complete driver's response to a crash in road traffic is obtained based on parallel recording of two physiological signals (ECG and EMG).
本研究的目的是验证在模拟碰撞威胁条件下，驾驶员身体是否会同时出现肌肉和循环系统的反应。
本研究在乘用车驾驶模拟器中进行。碰撞被纳入在城市环境中开发的驾驶测试场景。在22名年轻男性受试者组中，连续记录两种生理信号——心电图（ECG）和肌电图（EMG）。评估ECG信号中RR间期的长度。在静息状态（坐姿）、正常驾驶期间以及碰撞期间和碰撞后几分钟，对1分钟记录片段进行时域和频域的心率变异性（HRV）分析。对于左右侧肌肉：斜方肌（TR）和指浅屈肌（FDS），测定EMG信号幅度。比较驾驶期间和碰撞期间最大自主收缩（MVC）的百分比。
关于ECG信号，发现大多数驾驶员反映时域HRV的参数值发生了变化。RR间期平均长度（mRR）有显著变化。关于EMG信号，幅度变化涉及从FDS肌肉记录的信号。在一半的案例中，ECG和EMG的变化是同时发生的。
诸如mRR（ECG信号）和FDS-L幅度（EMG信号）等参数是对事故风险的反应。在模拟条件下，循环系统和肌肉骨骼系统的反应并不总是同时发生。结果表明，基于两种生理信号（ECG和EMG）的并行记录，可以获得驾驶员对道路交通事故更完整的反应。
