دانلود مقاله ISI انگلیسی شماره 59483
عنوان فارسی مقاله

مدولاسیون قلبی وحشت زدگی: اثر چشم بر هم زدن و پردازش شناختی بالاتر

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
59483 2009 7 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Cardiac modulation of startle: Effects on eye blink and higher cognitive processing
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Brain and Cognition, Volume 71, Issue 3, December 2009, Pages 265–271

کلمات کلیدی
چرخه قلبی؛ قضاوت شدت؛ زمان حرکت؛ زمان پاسخ؛ وحشت زدگی مدولاسیون؛ ارزیابی محرک؛ ادراک احشایی
پیش نمایش مقاله
پیش نمایش مقاله مدولاسیون قلبی وحشت زدگی: اثر چشم بر هم زدن و پردازش شناختی بالاتر

چکیده انگلیسی

Cardiac cycle time has been shown to affect pre-attentive brainstem startle processes, such as the magnitude of acoustically evoked reflexive startle eye blinks. These effects were attributed to baro-afferent feedback mechanisms. However, it remains unclear whether cardiac cycle time plays a role in higher startle-related cognitive processes, as well. Twenty-five volunteers responded first by ’fast as possible’ button pushes (reaction time, RT), and second, rated perceived intensity of 60 acoustic startle stimuli (85, 95, or 105 dB; 50 ms duration; binaural; instantaneous rise time), which were presented either 230 or 530 ms after the R-wave, and eye blink responses were measured by EMG. RT was divided into evaluation and motor response time according to previous research. Increasing stimulus intensity enhanced startle eye blink, intensity ratings, and RT components. Eye blinks and intensity judgments were lower when startle was elicited at a latency of R + 230 ms, but RT components were differentially affected: the evaluative component was attenuated, and the motor component was accelerated when stimuli were presented 230 ms after the R-wave. We conclude that the cardiac cycle affects the attentive processing of acoustic startle stimuli.

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