Durand J, Gogan P, Guéritaud J P, Horcholle-Bossavit G, Tyc-Dumont S
Exp Brain Res. 1983;53(1):118-28. doi: 10.1007/BF00239404.
Horseradish peroxidase was injected into the somata or axons of neurones located in the nucleus oralis of the spinal trigeminal complex and projecting to the accessory abducens nucleus. A group of 43 axons with electrophysiologically identified responses to the stimulation of three different areas of the face were studied. The latencies of their orthodromic responses following trigeminal stimulation and their pattern of discharges were compared to those of secondary trigeminal neurones and retractor bulbi motoneurones. Labelled trigeminal axons were found to generate collaterals for the accessory abducens nucleus. Terminal ramifications are present in the rostro-caudal part of the motor nucleus where the dendritic arborization of the motoneurones has been described. Connections to facial and trigeminal motor nuclei were also present, suggesting that secondary trigeminal axons distributed the information to the three motor targets at the brain stem level. It is suggested that the trigemino-retractor bulbi reflex is part of facial reflexes involved in orienting reactions, and protective responses resulting in coordinated movements of the facial musculature.
将辣根过氧化物酶注入位于三叉神经脊束核口部且投射至展神经副核的神经元的胞体或轴突内。研究了一组43条轴突，这些轴突对刺激面部三个不同区域具有电生理确定的反应。将它们在三叉神经刺激后的顺行反应潜伏期及其放电模式与二级三叉神经元和眼球退缩运动神经元的进行了比较。发现标记的三叉轴突为展神经副核发出侧支。终末分支存在于运动核的头-尾部分，此处已描述了运动神经元的树突分支。还存在与面神经核和三叉神经运动核的连接，这表明二级三叉轴突在脑干水平将信息分布到三个运动靶点。有人提出，三叉-眼球退缩反射是参与定向反应的面部反射的一部分，以及导致面部肌肉协调运动的保护性反应。
