Berardelli A, Cruccu G, Manfredi M, Rothwell J C, Day B L, Marsden C D
Neurology. 1985 Jun;35(6):797-801. doi: 10.1212/wnl.35.6.797.
A reflex contraction of the human orbicularis oculi muscles can be evoked by stimulation of either the supraorbital region ("blink reflex") or the cornea ("corneal reflex"). We found that the latency of the corneal reflex was longer, and the duration was longer than the R2 component of the blink reflex. The absolute refractory period of the R2 component of the blink reflex was longer after supraorbital than after corneal conditioning stimulation. When the R2 component of the blink reflex was habituated by repetitive stimuli, stimulation of the cornea still evoked a reflex, but supraorbital stimulation produced only a depressed R2 response. These findings suggest that the two reflexes do not have identical neural connections.
刺激眶上区域（“瞬目反射”）或角膜（“角膜反射”）均可诱发人类眼轮匝肌的反射性收缩。我们发现，角膜反射的潜伏期更长，且持续时间比瞬目反射的R2成分更长。眶上条件刺激后，瞬目反射R2成分的绝对不应期比角膜条件刺激后更长。当瞬目反射的R2成分因重复刺激而产生习惯化时，刺激角膜仍可诱发反射，但眶上刺激仅产生减弱的R2反应。这些发现表明，这两种反射的神经连接并不相同。
