Neurocomputing 68 (2005) 251–257 Letters EEG pattern discrimination between salty and sweet taste using adaptive Gabor transform Juliana Cristina Hashida, Ana Carolina de Sousa Silva, Se´rgio Souto, Ernane Jose´ Xavier Costa à Basic Science, Sao Paulo University, Duque de Caxias Norte 225, 13635-900 Pirasununga, Sao Paulo, Brazil Received 24 January 2005; received in revised form 20 April 2005; accepted 20 April 2005 Available online 8 June 2005 Communicated by R. W. Newcomb Abstract This article uses adaptive Gabor transform (AGR) for drawing feature information from human electroencephalogram (EEG) signals aiming at the discrimination among mental tasks during gustatory stimulation. In this study, single-channel EEG records from eight healthy humans were assessed during the application of sweet, salty and distilled water tastes. Muscular, ocular and skin potential activities were controlled. Overall results show that AGR coefficient representations are able to reveal a significant EEG discrimination among sweet, salty and water tastes. r 2005 Elsevier B.V. All rights reserved. Keywords: Sensorial analysis; Time–frequency; Brain; Flavors 1. Introduction Electroencephalography (EEG) is a noninvasive method to measure brain activity. Considering that sensory stimuli are processed by the brain regarding their physical properties and hedonic quality [1], EEG signals can be used to study brain responses to tastes stimuli. Single EEG channel records can be used to monitor mental tasks ARTICLE IN PRESS www.elsevier.com/locate/neucom 0925-2312/$-see front matter r 2005 Elsevier B.V. All rights reserved. doi:10.1016/j.neucom.2005.04.004 à Corresponding author. Tel.: +551935654177; fax: +551935618606. E-mail address: ernane@usp.br (E.J.X. Costa).