Valls-Solé J, Cammarota A, Alvarez R, Hallett M
Unitat d'EMG, Hospital Clinic, Barcelona, Spain.
Brain Res. 1994 Jul 11;650(2):313-6. doi: 10.1016/0006-8993(94)91797-3.
A brief mechanical or electrical stimulus to peripheral nerve afferents from the upper and lower limbs elicited a small and inconsistent EMG response of the orbicularis oculi muscles. This response was facilitated when the stimuli were delivered at fixed leading time intervals, of 45-300 ms, with respect to a supraorbital nerve electrical stimulus. Also, the peripheral nerve stimulus modified the conventional blink reflex responses, inducing facilitation of R1 and inhibition of R2. These results suggest a complex processing of sensory inputs from the face and the limbs at the brainstem, where they are probably integrated in a network of interneurons influencing the excitability of facial motoneurons.
对上、下肢外周神经传入纤维施加短暂的机械或电刺激，会引发眼轮匝肌产生微小且不稳定的肌电图反应。当相对于眶上神经电刺激，以45 - 300毫秒的固定超前时间间隔施加刺激时，这种反应会增强。此外，外周神经刺激改变了传统的瞬目反射反应，导致R1增强和R2抑制。这些结果表明，在脑干处，来自面部和肢体的感觉输入存在复杂的处理过程，它们可能在一个中间神经元网络中整合，从而影响面部运动神经元的兴奋性。
