Neurologic Exam Cranial Nerves Normal : Cranial Nerves 2 & 3- Pupillary Light Reflex

Cranial Nerves 2 & 3- Pupillary Light Reflex The afferent or sensory limb of the pupillary light reflex is CN2 while the efferent or motor limb is the parasympathetics of CN3. Shine a flashlight into each eye noting the direct as well as the consensual constriction of the pupils. The swinging flashlight test is used to test for a relative afferent pupillary defect or a Marcus Gunn pupil. Swinging the flashlight back and forth between the two eyes identifies if one pupil has less light perception than the ot