Nonlinear and linear EEG complexity changes caused by gustatory stimuli in anorexia nervosa

Erika Tóth, I. Kondákor, Ferenc Túry, Ágnes Gáti, Júlia Weisz, M. Molnár

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The objective of the present study was to investigate the effects of pleasant and unpleasant gustatory stimuli on nonlinear and linear complexity measures of the EEG in healthy controls and in anorexia nervosa (AN) patients. The subjects were exposed to unpleasant (bitter tea) and pleasant (chocolate) gustatory stimuli for 2 min. Multichannel EEG was recorded and the dimensional complexity (point-correlation dimension) and Omega complexity were calculated from the EEG epochs corresponding to the above taste conditions. In AN patients lower-dimensional complexity was observed in the majority of recording sites than that seen in controls, independent of taste conditions. Higher Omega complexity was seen in control subjects in the left side irrespective of taste effects. No such hemispheric difference was observed in AN. The lower-dimensional complexity seen in AN patients may be caused by long-lasting effects of malnutrition. The lack of a significant Omega complexity change in response to exposure of sweet taste in the left side seen in AN patients may correspond to a decreased sensitivity to such stimuli in these subjects.

Original languageEnglish
Pages (from-to)253-260
Number of pages8
JournalInternational Journal of Psychophysiology
Volume51
Issue number3
DOIs
Publication statusPublished - Feb 2004

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Anorexia Nervosa
Electroencephalography
Tea
Malnutrition

Keywords

  • Anorexia
  • Electroencephalogram
  • Omega complexity
  • Point-correlation dimension
  • Sweet and bitter taste

ASJC Scopus subject areas

  • Behavioral Neuroscience

Cite this

Nonlinear and linear EEG complexity changes caused by gustatory stimuli in anorexia nervosa. / Tóth, Erika; Kondákor, I.; Túry, Ferenc; Gáti, Ágnes; Weisz, Júlia; Molnár, M.

In: International Journal of Psychophysiology, Vol. 51, No. 3, 02.2004, p. 253-260.

Research output: Contribution to journalArticle

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