Weber M, Whitman R D
Department of Psychology, Wayne State University, Detroit, MI.
Int J Neurosci. 1991 Mar;57(1-2):19-24. doi: 10.3109/00207459109150343.
Brainstem evoked potentials were measured while subjects reduced either frontalis or lips/throat activity in response to visual information regarding EMG activity while attending to dichotically presented click stimuli. An inhibition of left ear activity occurred at the level of the cochlear nucleus (Wave 1) during articulatory muscle activity, suggesting that the right ear advantage is related to active inhibition of ipsilateral auditory pathways. Contralateral central inhibition of disattended information at the level of the brainstem (Wave 5) was also implicated. A neurophysiological model accounting for both attenuation of irrelevant stimuli and vigilance for high priority information is proposed.
在受试者根据有关肌电图活动的视觉信息减少额肌或嘴唇/喉咙活动，同时注意双耳呈现的点击刺激时，测量脑干诱发电位。在发音肌肉活动期间，耳蜗核（波1）水平出现左耳活动抑制，这表明右耳优势与同侧听觉通路的主动抑制有关。还涉及在脑干水平（波5）对未注意信息的对侧中枢抑制。提出了一种神经生理学模型，该模型既能解释无关刺激的衰减，又能解释对高优先级信息的警觉性。
