Neurons of this nucleus have synaptic connections Stephen @University

Question 4 / 23: Neurons of this nucleus have synaptic connections with the nucleus of nerve VII (facial nerve) that are essential for the corneal reflex. If the reflex is absent, because the afferent limb is interrupted, which of the following would be present upon stimulation of the side of the lesion?

A. Ipsilateral reflex present, contralateral absent.

B. Contralateral present, ipsilateral absent.

C. Ipsilateral absent, contralateral absent.

D. Ipsilateral present, contralateral present.

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Explanation:

The corneal reflex* is important. If it does not occur, the cornea becomes infected (keratitis) and corneal erosion can lead to loss of vision. Blinking and tearing are essential to the health of the cornea. This is the descending nucleus of V where trigeminal axons terminate.

Quiz Home Page

https://www.jobilize.com/ch-06-head-somatic-visceral-sensory-systems

Ch 06: Head Somatic & Visceral Sensory Systems

Author:

M.D.Stephen VoronLecturer

University of Utah

USA

Access: Public Instant Grading

Attribution: Stephen C. Voron, M.D., Suzanne S. Stensaas, Ph.D. , Department of Neurobiology and Anatomy, University of Utah, School of Medicine, Salt Lake City, Utah 84132, http://library.med.utah.edu/kw/hyperbrain

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