Martinho Pimenta A J, Castelo Branco N A
Santo António dos Capuchos Hospital, Lisbon, Portugal.
Aviat Space Environ Med. 1999 Mar;70(3 Pt 2):A119-21.
The Vibroacoustic Disease (VAD) is an occupational pathology induced by long-term (>10 yr) exposure to large pressure amplitude (> or = 90 dB SPL) and low frequency (< or = 500 Hz) noise. During studies contributing to the characterization of VAD, abnormal facial movements induced by repetitive auditory stimuli were observed in one individual employed as an aeronautical mechanic. The goal of this study was to investigate the existence of movement disorders triggered by auditory stimuli in a group of VAD-diagnosed patients.
Sixty VAD patients received auditory and median nerve stimulation. Simultaneously, EEG monitoring was performed.
Abnormal myoclonus movements were triggered by auditory stimuli in four patients. EEG recordings were normal in all 60 patients. Stimulation of the median nerves did not trigger any abnormal movements.
These data suggest that this facial dyskinesia has a subcortical origin.
振动声学疾病（VAD）是一种职业性病理状况，由长期（>10年）暴露于大压力幅度（≥90 dB SPL）和低频（≤500 Hz）噪声引起。在有助于VAD特征描述的研究过程中，在一名航空机械师身上观察到重复听觉刺激诱发的异常面部运动。本研究的目的是调查一组被诊断为VAD的患者中是否存在由听觉刺激引发的运动障碍。
60名VAD患者接受听觉和正中神经刺激。同时，进行脑电图监测。
4名患者的听觉刺激引发了异常肌阵挛运动。所有60名患者的脑电图记录均正常。正中神经刺激未引发任何异常运动。
这些数据表明这种面部运动障碍起源于皮层下。
