Document Detail

Metallic taste from electrical and chemical stimulation.
MedLine Citation:
PMID:  15741603     Owner:  NLM     Status:  MEDLINE    
A series of three experiments investigated the nature of metallic taste reports after stimulation with solutions of metal salts and after stimulation with metals and electric currents. To stimulate with electricity, a device was fabricated consisting of a small battery affixed to a plastic handle with the anode side exposed for placement on the tongue or oral tissues. Intensity of taste from metals and batteries was dependent upon the voltage and was more robust in areas dense in fungiform papillae. Metallic taste was reported from stimulation with ferrous sulfate solutions, from metals and from electric stimuli. However, reports of metallic taste were more frequent when the word 'metallic' was presented embedded in a list of choices, as opposed to simple free-choice labeling. Intensity decreased for ferrous sulfate when the nose was occluded, consistent with a decrease in retronasal smell, as previously reported. Intensity of taste evoked by copper metal, bimetallic stimuli (zinc/copper) or small batteries (1.5-3 V) was not affected by nasal occlusion. This difference suggests two distinct mechanisms for evocation of metallic taste reports, one dependent upon retronasal smell and a second mediated by oral chemoreceptors.
Harry T Lawless; David A Stevens; Kathryn W Chapman; Anne Kurtz
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, P.H.S.     Date:  2005-03-01
Journal Detail:
Title:  Chemical senses     Volume:  30     ISSN:  0379-864X     ISO Abbreviation:  Chem. Senses     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-03-23     Completed Date:  2005-08-01     Revised Date:  2013-06-09    
Medline Journal Info:
Nlm Unique ID:  8217190     Medline TA:  Chem Senses     Country:  England    
Other Details:
Languages:  eng     Pagination:  185-94     Citation Subset:  IM    
Department of Food Science, Stocking Hall, Cornell University, Ithaca, NY 14853, USA.
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MeSH Terms
Chemoreceptor Cells / drug effects,  physiology
Electric Stimulation* / methods
Ferrous Compounds / pharmacology
Mouth / physiology
Nose / physiology
Smell / physiology
Stimulation, Chemical*
Taste / physiology*
Tongue / physiology
Grant Support
Reg. No./Substance:
0/Ferrous Compounds; 0/Metals; 7440-50-8/Copper; 7440-66-6/Zinc; 7720-78-7/ferrous sulfate

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