کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
921644 920791 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
To inhale or not to inhale: Conditioned avoidance in breathing behavior in an odor—20% CO2 paradigm
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
To inhale or not to inhale: Conditioned avoidance in breathing behavior in an odor—20% CO2 paradigm
چکیده انگلیسی

This study investigated breathing behavior in an odor—CO2-inhalation fear conditioning paradigm. A differential conditioning paradigm was applied in 55 participants. Both acquisition and extinction consisted of three CS+ and three CS− trials. Diluted ammonia and butyric acid served as conditional odor cues (CSs); inhalation of 20% CO2-enriched as US. The US was presented 10 s after CS+ onset and both stimuli co-terminated 30 s later. Subjective anxiety and US-expectancy were measured online upon presentation of the CSs. Respiratory behavior showed a biphasic pattern during CS+ acquisition trials. Participants paradoxically lowered their ventilation first; an increased ventilation was observed only towards the end of the trial. Extinction of this breathing inhibition was found. Participants avoiding the CO2 during acquisition did not show a reduction in fear from acquisition to extinction, whereas Non-avoiders did. We conclude that paradoxical decreases in ventilation constitute a relevant behavioral index of fear in CO2-inhalation paradigms.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biological Psychology - Volume 78, Issue 1, April 2008, Pages 87–92
نویسندگان
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