Question 17 / 23:  The contraction of thoracic and abdominal striated muscles involved in vomiting depends on the stimulation of ventral horn cells at the appropriate spinal cord levels. How are these connected with the nucleus solitarius?
A.  Tractus solitarius.
B.  Descending tract of V.
C.  Through the reticular formation and reticulospinal tracts.
D.  Trigeminothalamic tract.
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Explanation:

Interneurons in the reticular formation make the appropriate connections. Also, there may be axons from the nucleus solitarius that synapse in the ventral horn.

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Ch 06: Head Somatic & Visceral Sensory Systems

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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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