Card 15 / 27: A person with a left facial paralysis who is also deaf in the left ear is tested for his corneal reflex.
A.)
Stimulation of left cornea does not produce a consensual reflex.
B.)
Stimulation of left cornea produces a consensual but not a direct reflex.
C.)
Stimulation of left cornea results in a direct but not a consensual reflex.
D.)
Stimulation of the right cornea produces a direct and consensual reflex.
Answer:
B.) Stimulation of left cornea produces a consensual but not a direct reflex.
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The trigeminal is intact, so the afferent arm of the corneal reflex is intact. This would result in a normal consensual reflex. Since the facial muscles on the left side are paralyzed, the direct reflex would not be present. The term, direct reflex refers to the side stimulated.
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Ch 06: Head Somatic & Visceral Sensory Systems
Author:
M.D.Stephen VoronLecturer
University of Utah
USA
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