Hepp K, Henn V
Vision Res. 1985;25(4):493-9. doi: 10.1016/0042-6989(85)90151-8.
Static firing frequencies have been determined in extraocular motoneuronal discharge patterns for different eye positions within +/- 30 deg around the primary position. From these data iso-frequency curves were plotted stating all possible eye positions for a given firing rate. Such curves have been constructed for the lateral, medial, and inferior recti, the superior oblique and for the upward pulling muscles (without distinguishing superior rectus and inferior oblique). Fixation of eye position always involved natural synergistic action of all muscles. The iso-frequency curves of individual motoneurons are a family of almost parallel curves with mainly horizontal or vertical gradients. Especially for the superior oblique, the innervation gradients depend strongly on eye position. Motoneurons subserving the same muscle can have different innervation gradients at the same eye position.
已确定眼外运动神经元在围绕初始位置±30度范围内不同眼位的放电模式的静态发放频率。根据这些数据绘制了等频率曲线，表明给定发放率下的所有可能眼位。已为外直肌、内直肌、下直肌、上斜肌以及向上牵拉肌（未区分上直肌和下斜肌）构建了此类曲线。眼位固定始终涉及所有肌肉的自然协同作用。单个运动神经元的等频率曲线是一族几乎平行的曲线，主要具有水平或垂直梯度。特别是对于上斜肌，神经支配梯度强烈依赖于眼位。支配同一肌肉的运动神经元在相同眼位可能具有不同的神经支配梯度。
