Final answer:
A blink reflex study measures the neurological pathways of the corneal or eye blink reflex, involving both the sensory and motor components triggered by stimulation of the cornea.
Step-by-step explanation:
Recording a blink reflex study measures portions of the neurological pathways responsible for the corneal or eye blink reflex. This reflex is a protective response that is initiated when the cornea is stimulated by a tactile stimulus or by bright light. The portions involved in this reflex include the sensory component traveling through the trigeminal nerve for tactile stimuli or the optic nerve for light-based stimuli, while the motor response is conveyed through the facial nerve to the orbicularis oculi muscle, leading to a blink. This protective reflex is an important part of a physical exam, which can utilize methods like an air puff or a cotton-tipped applicator to trigger a blink.