Järveläinen J, Schürmann M, Avikainen S, Hari R
Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology FIN-02015 HUT, Finland.
Neuroreport. 2001 Nov 16;12(16):3493-5. doi: 10.1097/00001756-200111160-00024.
The monkey premotor cortex contains neurons that are activated both when the monkey performs motor acts and when he observes actions made by others. A similar mirror neuron system, involving several brain areas, has been found in humans. We recorded neuromagnetic oscillatory activity from the primary motor cortex of 10 healthy subjects when they observed live and videotaped finger movements. The left and right median nerves were stimulated alternatingly and the poststimulus level of the approximately 20 Hz rhythm was quantified. Compared with the rest condition, the approximately 20 Hz rhythm was dampened 15-19% more when the subjects observed live rather than videotaped hand movements, indicating stronger activation of the primary motor cortex. These results suggest that the human mirror neuron system differentiates natural and artificially presented movements.
猴子的运动前区皮层包含这样一些神经元，当猴子执行运动动作以及当它观察其他猴子做出的动作时，这些神经元都会被激活。在人类中也发现了类似的涉及多个脑区的镜像神经元系统。我们记录了10名健康受试者在观察现场和录像中的手指运动时，其初级运动皮层的神经磁振荡活动。左右正中神经交替受到刺激，并对刺激后约20赫兹节律的水平进行量化。与静息状态相比，当受试者观察现场手部运动而非录像中的手部运动时，约20赫兹的节律减弱幅度要多15 - 19%，这表明初级运动皮层的激活更强。这些结果表明，人类镜像神经元系统能够区分自然呈现的运动和人工呈现的运动。
