Document Detail

Trigeminal orosensation and ingestive behavior in the rat.
MedLine Citation:
PMID:  6838727     Owner:  NLM     Status:  MEDLINE    
A deafferentation procedure was used to examine the contributions of trigeminal orosensation to the control of ingestive behavior in the rat. The procedure removed somatosensory input from the mouth, sparing olfaction, lingual taste, and vibrissae inputs as well as proprioceptive afferents from and efferents to the jaw muscles. Rats with sections of tongue or jaw muscle efferents served as oromotor controls. Bilateral trigeminal orosensory deafferentation was followed by an array of effects on ingestive behavior whose magnitudes were proportional to the extent of the deafferentation. The "trigeminal syndrome" includes a disruption of food and water intake (aphagia, adipsia), impairments in the sensorimotor control of eating and drinking, decreased responsiveness to food and water, and a reduction in the level of body weight regulation. Trigeminal deafferentation spared elementary ingestive movement patterns (biting, licking, chewing) but disrupted their control by the perioral stimuli, which normally elicit them, so that eating and drinking sequences were either aborted or inefficient. Deficits in food intake varied with the sensory properties of the diet. Recovery of intake took place along a palatability gradient, and recovery of water intake paralleled that of dry food. The chronically reduced body weight was caused by a persistent hypophagia and reflects reduced responsiveness to food. These findings suggest a considerable degree of overlap in the neural mechanisms mediating the sensorimotor and motivational control of intake in the rat.
M F Jacquin; H P Zeigler
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Behavioral neuroscience     Volume:  97     ISSN:  0735-7044     ISO Abbreviation:  Behav. Neurosci.     Publication Date:  1983 Feb 
Date Detail:
Created Date:  1983-06-10     Completed Date:  1983-06-10     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8302411     Medline TA:  Behav Neurosci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  62-97     Citation Subset:  IM    
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MeSH Terms
Alveolar Process / innervation
Body Weight
Consummatory Behavior / physiology
Hypoglossal Nerve / physiology
Jaw / innervation
Lingual Nerve / physiology
Mouth / physiology
Tongue / innervation
Trigeminal Nerve / physiology*
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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