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Titolo:
Slow cortical DC-potential responses to sweet and bitter tastes in humans
Autore:
Schmitt, B; Marshall, L; Nitsche, M; Hallschmid, M; Eulitz, C; Born, J;
Indirizzi:
Med Univ Lubeck, Dept Neuroendocrinol, D-23538 Lubeck, Germany Med Univ Lubeck Lubeck Germany D-23538 docrinol, D-23538 Lubeck, Germany Univ Bamberg, D-96045 Bamberg, Germany Univ Bamberg Bamberg Germany D-96045 v Bamberg, D-96045 Bamberg, Germany Univ Konstanz, Dept Psychol, D-78457 Constance, Germany Univ Konstanz Constance Germany D-78457 chol, D-78457 Constance, Germany
Titolo Testata:
PHYSIOLOGY & BEHAVIOR
fascicolo: 5, volume: 71, anno: 2000,
pagine: 581 - 587
SICI:
0031-9384(200012)71:5<581:SCDRTS>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
STARTLE REFLEX; ORBITOFRONTAL CORTEX; CEREBRAL-CORTEX; MONKEY CORTEX; NEURONS; DECREASES; SALIVA; SHIFTS; SLEEP;
Keywords:
DC potential; cortical excitability; taste; primary reinforcer; pleasure; reward; aversion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Born, J Med Univ Lubeck, Dept Neuroendocrinol, Ratzeburger Allee 160,Haus 23A, D-23538 Lubeck, Germany Med Univ Lubeck Ratzeburger Allee 160,Haus 23ALubeck Germany D-23538
Citazione:
B. Schmitt et al., "Slow cortical DC-potential responses to sweet and bitter tastes in humans", PHYSL BEHAV, 71(5), 2000, pp. 581-587

Abstract

Processing of hedonic stimulus quality is assumed to be accompanied by a tuning of cortical arousal and excitability. In this pilot study in 11 healthy humans scalp-recorded DC potentials were assessed during application of a sweet (sucrose) and bitter (quinine hydrochloride) taste, i.e., primary reinforcers of positive and negative quality. Muscular, ocular, and skin potential activity were controlled. Application of sucrose induced a widespread positive DC-potential shift with an amplitude of 40-50 muV and persistingfor more than 120-s post-stimulus onset. Following administration of quinine hydrochloride, this positive shift was reduced, most distinctly between 48- and 88-s post-stimulus onset. The reduction appeared to be most consistent at anterior midline recording sites (Fz, Ct). It is assumed that the higher DC-potential positivity during sweetness than during bitterness pointsto a differential tuning of cortical excitability by a widespread decreasein depolarization of apical dendrites. (C) 2000 Elsevier Science Inc. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 20:10:16