کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
944755 1475580 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effects of negative emotion on encoding-related neural activity predicting item and source recognition
ترجمه فارسی عنوان
اثرات احساسات منفی در فعالیت های عصبی مرتبط با رمزگذاری پیش بینی آیتم و شناسایی منبع
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
چکیده انگلیسی


• Negative emotional content can enhance ERP activity predicting successful recognition.
• Emotion enhances encoding processes for central item information.
• When emotion reaches high levels of arousal, it also enhances encoding of contextual information.
• The morphology of ERPs suggests early and late attentional processes are involved in EEM.
• Emotional modulation of recognition memory is consistent with a hybrid attentional model for EEM.

We report here a study that obtained reliable effects of emotional modulation of a well-known index of memory encoding – the electrophysiological “Dm” effect – using a recognition memory paradigm followed by a source memory task. In this study, participants performed an old–new recognition test of emotionally negative and neutral pictures encoded 1 day before the test, and a source memory task involving the retrieval of the temporal context in which pictures had been encoded. Our results showed that Dm activity was enhanced for all emotional items on a late positivity starting at ~400 ms post-stimulus onset, although Dm activity for high arousal items was also enhanced at an earlier stage (200–400 ms). Our results also showed that emotion enhanced Dm activity for items that were both recognised with or without correct source information. Further, when only high arousal items were considered, larger Dm amplitudes were observed if source memory was accurate. Three main conclusions are drawn from these findings. First, negative emotion can enhance encoding processes predicting the subsequent recognition of central item information. Second, if emotion reaches high levels of arousal, the encoding of contextual details can also be enhanced over and above the effects of emotion on central item encoding. Third, the morphology of our ERPs is consistent with a hybrid model of the role of attention in emotion-enhanced memory (Pottage and Schaefer, 2012).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuropsychologia - Volume 73, July 2015, Pages 48–59
نویسندگان
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