Detection, discrimination, and sensation of visceral stimuli

Hölzl, Rupert ; Erasmus, Lutz-Peter ; Möltner, Andreas ; Samay, Sebastian ; Waldmann, Hans-Christian ; Neidig, Claus W.

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URN: urn:nbn:de:bsz:180-madoc-21978
Document Type: Working paper
Year of publication: 1994
The title of a journal, publication series: Forschungsberichte aus dem Otto-Selz-Institut für Angewandte Psychologie
Volume: 30
Place of publication: Mannheim
ISSN: 0931-1394
Publication language: English
Institution: School of Social Sciences > Sonstige - Fakultät für Sozialwissenschaften
MADOC publication series: Veröffentlichungen des Otto-Selz-Instituts > Forschungsberichte
Subject: 150 Psychology
Subject headings (SWD): Physiologische Psychologie
Individual keywords (German): Somaesthetische Wahrnehmung , Gastrointestinales System , Stimulusdiskrimination
Keywords (English): somesthetic perception , gastrointestinal system , stimulus discrimination
Abstract: Examines the interoception of gastrointestinal stimuli. A total of 48 subjects participated in the study that used an adaptive up-down tracking method of threshold determination of distensions to the colon wall. Subjects were presented with two temporal intervals, and the stimulus was applied to one of the intervals. Then they were required to give behavioral and subjective responses to perceived distension stimuli in the lower bowel segments. It is concluded that detection of stimuli is possible without reportable sensation, but that awareness is needed for localization. A two-process model of gastrointestinal interoception is proposed for perception of phasic gastrointestinal distension by the relations between the behavioral performance of discrimination and the subjective sensation characteristics.
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