Macaluso G M, Pavesi G, Bonanini M, Mancia D, Gennari P U
Università degli Studi di Parma, Istituto di Clinica Odontoiatrica.
Minerva Stomatol. 1990 May;39(5):343-6.
Magnetic stimulation of nervous elements is a new technique of investigation in intact alert man. Electromyographic responses of the masseter muscles were recorded in normal volunteers and in two patients with hemispheric or capsular lesions, both by surface and needle electrodes. In the patients "cortical" responses were absent when stimulating the affected hemisphere and present when stimulating the unaffected one. These findings suggest that the direct facilitating cortico-nuclear projections for the masseter muscle are mainly crossed. Nevertheless the presence of clear ipsilateral responses after stimulation of the unaffected hemisphere demonstrates the existence of uncrossed projections; in fact only the ipsilateral motor cortex can be the site of origin of the responses in these patients.
对神经元件进行磁刺激是一种用于清醒状态下完整人体的新型研究技术。通过表面电极和针电极记录了正常志愿者以及两名患有半球或囊病变患者咬肌的肌电图反应。在患者中，刺激患侧半球时“皮质”反应缺失，而刺激未受影响的半球时则出现反应。这些发现表明，咬肌的直接促通皮质-核投射主要是交叉性的。然而，刺激未受影响的半球后出现明显的同侧反应，这证明了非交叉投射的存在；实际上，在这些患者中，只有同侧运动皮质可能是这些反应的起源部位。
