82 Ice Melts Phantogeusia: Cold Inhibition of Gustatory Hallucinations

• Published in: CNS spectrums 2019-02, Vol.24 (1), p.216-217
• Main Authors: Mutti, Suhanna, Hirsch, Alan R
• Format: Article
• Language: English
• Subjects: Hallucinations
• ISSN: 1092-8529; 2165-6509
• DOI: 10.1017/S1092852919000610

IntroductionRelief of phantogeusia through ice cube stimulation has not heretofore been noted. METHODS: This 70-year-old left handed (familial) female noted the onset, three and a half years ago, of reduced taste 80 percent of normal, distorted taste, hallucinated metallic taste, and BMS. Upon application of an ice cube to the tongue, both the metallic taste and the BMS resolved for a few seconds, without impairing her true taste ability. With repeat application, the alleviation effect persists. RESULTS: Abnormalities in Neurologic Examination: Sensory Examination: Decreased pinprick and temperature bilateral lower extremities. Reflexes: 3+ throughout. Bilateral positive Hoffman's reflexes. Chemosensory testing: Olfaction: Brief Smell Identification Test: 9 (normosmia). Retronasal Smell Index: 10 (normosmia). Gustation: Propylthiouracil Disc Taste Test: 5 (normogeusia).DiscussionTransient Receptor Potential 5, is expressed in tongue taste buds, facilitating sweet perception, and is temperature dependent (Fujiyama, 2010). Ice may act to reduce such sweet taste receptor discharge, causing an imbalance in taste fiber discharge thus inhibiting the perceived metallic taste. In those who suffer from intractable phantogeusia, a trial of ice cubes or mechanisms to reduce temperature of the tongue is warranted.