Blinking is one of the motor acts performed more frequently by healthy human subjects. It involves the reciprocal action of at least two muscles: the orbicularis oculi shows a brief phasic activation, while the levator palpebrae shows transient inhibition. The blink reflex, the electrical version of the corneal reflex, represents a polysynaptic reflex. This reflex helps to assess cranial nerves V and VII along with their connections in the pons and medulla.
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https://www.physio-pedia.com/Blink_Reflex
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