種々の味刺激による成人の表情反応

概要

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To evaluate facial expression patterns induced by different taste stimuli, electromyograms (EMGs) of facial and chewing muscles in healthy university students aged between 20 and 23 were analyzed. Sucrose (sweet), Nacl (salty), citric acid (sour), quinine-HCl (bitter), monosodium glutamate (MSG ; umami), capsaicine (pungent), tannic acid (astringent) and homogentisic acid (harsh) were used as taste stimuli. The rating scale tests were also performed to determine the hedonics for the taste stimuli. EMG responses of corrugator supercilii, orbicularis oculi, risorius, masseter and temporal muscles to capsaicine, tannic acid and citric acid were larger in amplitude than those to NaCl, MSG, homogentisic acid and sucrose. EMG response patterns of corrugator supercilii and orbicularis oculi muscles for the former taste stimuli were phasic, while they were tonic for the latter taste stimuli. EMG responses of frontal belly and depressor anguli oris muscles to all taste stimuli were similar in amplitude. Thus, facial and chewing muscles exhibited larger responses to disliked or less preferred tastes, except quinine-HCl bitter taste, than preferred tastes.
日本味と匂学会の論文