Hayes 2 Sensation

A 15-year-old boy felt a foreign body sensation in his right eye after he had been raking hay. His local physician prescribed a suspension of tobramycin 0.3% + dexamethasone 0.1% tds, but 6 days later referred him for evaluation of a suspected fungal keratitis. He had a corneal epithelial defect with an underlying dense... 

The sense of smell is not difficult to deceive. During a television programme about the senses, O Mahony (1978) told the audience that when they heard a tone they would experience a pleasant country smell. Many viewers wrote in to report that they had perceived the smell of grass or hay. Several people even wrote to complain that they had suffered from attacks of hay fever and sneezing after listening to the tone. The belief that an odour was present was sufficient to trigger these sensations in many people even though the odour was not actually there. 

Hayes JE, Wallace MR, Knopik VS, Herbstman DM, Bartoshuk LM and Duffy VB. (2011) Allelic variation in TAS2R bitter receptor genes associates with variation in sensations from and ingestive behaviors toward common bitter beverages in adults. Chem Senses, 36 311-319. 

Hayes JE, Snllivan BS and Duffy VB. (2010) Explaining variability in sodium intake through oral sensory phenotype, salt sensation and liking. Physiol Behav, 100 369-380. Peryam DR and Pilgrim FJ. (1957) Hedonic scale method of measuring food preferences. Food Technol, 11 9-14. 

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