Read More: How do you know if a bond is polar or How do you test the light pupil reaction? Which of the following statements is an example of the consensual light reflex? The pupil of the right eye constricts while shining a flashlight into the left eye. Which of the following statements is an example of the consensual light reflex? The efferent part of the pathway (blue) is the impulse/message that is sent from the mid-brain back to both pupils via the ciliary ganglion and the third cranial nerve (the oculomotor nerve), causing both pupils to constrict, even even though only one eye is being stimulated by the light. Why do both pupils constrict in response to light in one eye? If one eye only is stimulated, both pupils constrict, the so-called consensual reflex. In the light reflex, the pupils constrict when light is shone on the retina. Pupillary reflexes involve the autonomic (Edinger-Westphal) component of the oculomotor nucleus. What type of reflex is the pupillary light reflex? Abnormal pupillary light reflex can be found in optic nerve injury, oculomotor nerve damage, brain stem lesions, such as tumors, and medications like barbiturates. Pupillary light reflex is used to assess the brain stem function. What causes abnormal pupillary light reflex? That is, a light directed in one eye results in constriction of the pupils of both eyes. Recall that the optic tract carries visual information from both eyes and the pretectal area projects bilaterally to both Edinger-Westphal nuclei: Consequently, the normal pupillary response to light is consensual. When light reaches a pupil there should be a normal direct and consensual response. Swinging Flashlight Test: Swing a light back and forth in front of the two pupils and compare the reaction to stimulation in both eyes.
How do you test a consensual light reflex? How do you assess for consensual pupillary reaction? A consensual pupillary reflex is response of a pupil to light that enters the contralateral (opposite) eye. Is pupillary reflex consensual or ipsilateral?Ī direct pupillary reflex is pupillary response to light that enters the ipsilateral (same) eye. The efferent (motor) pupillary pathway has both parasympathetic and sympathetic nervous system actions. The consensual light reflex occurs because both the optic and tectotegmental tracts carry fibers from both eyes.
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