Hassfeld S, Schuchardt V, Geisler H, Meinck H M
Department of Oromaxillofacial Surgery, University of Heidelberg, Germany.
J Neurol Sci. 1995 Dec;134(1-2):197-202. doi: 10.1016/0022-510x(95)00224-3.
The masseter inhibitory reflex was investigated in 60 healthy volunteers, in 38 patients with trigeminal nerve branch lesions in the majority due to dental surgery, and in 9 patients with facial sensory loss and weakness caused by brain hemisphere lesions. The reflex threshold (TR) was almost symmetric both in normal subjects and in the patients with hemisphere lesions. In peripheral trigeminal hypaesthesia, elevation of TR on the lesioned side proved the most sensitive electrophysiological parameter. There was, moreover, some correspondence between the degree of sensory loss in hypaesthesic skin areas and elevation of TR, and recovery from the lesion was associated with TR normalization. Supratentorial lesions, in contrast, may influence the reflex pattern rather than reflex excitability.
对60名健康志愿者、38名主要因牙科手术导致三叉神经分支损伤的患者以及9名因脑半球损伤导致面部感觉丧失和无力的患者进行了咬肌抑制反射研究。正常受试者和脑半球损伤患者的反射阈值（TR）几乎对称。在周围性三叉神经感觉减退中，患侧TR升高是最敏感的电生理参数。此外，感觉减退皮肤区域的感觉丧失程度与TR升高之间存在一定对应关系，损伤恢复与TR恢复正常相关。相比之下，幕上病变可能影响反射模式而非反射兴奋性。
