دانلود مقاله ISI انگلیسی شماره 59032
عنوان فارسی مقاله

آیا مکانیسم رایج در هیجان خواهی و تحریف واقعیت در اسکیزوفرنی وجود دارد؟ یک مطالعه با استفاده از حافظه پتانسیل های مرتبط با رویداد

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
59032 2005 23 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Are there common mechanisms in sensation seeking and reality distortion in schizophrenia? A study using memory event-related potentials
منبع

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

Journal : Psychiatry Research, Volume 135, Issue 1, 15 May 2005, Pages 11–33

کلمات کلیدی
پتانسیلهای برانگیخته - هیجان خواهی؛ تحریف واقعیت؛ بازداری؛ پردازش زمینه - حفظی اتصال؛ تکانشگری
پیش نمایش مقاله
پیش نمایش مقاله آیا  مکانیسم رایج در هیجان خواهی و تحریف واقعیت در اسکیزوفرنی وجود دارد؟ یک مطالعه با استفاده از حافظه پتانسیل های مرتبط با رویداد

چکیده انگلیسی

A growing literature suggests that the characteristics of sensation seeking and reality distortion expressed in schizophrenia share several mechanisms. In a previous study, the comparison of patients with high vs. low reality distortion using event-related potentials (ERPs) recorded in a recognition memory task for unfamiliar faces identified neural and cognitive anomalies specifically related to the expression of these symptoms. As a follow-up, this study investigated the ERP correlates of sensation seeking in schizophrenia using the same recognition memory protocol. ERPs have been recorded in controls (N = 21) and schizophrenia patients separated into high (HSS; N = 13) and low (LSS; N = 17) scorers according to Zuckerman's Sensation Seeking Scale. The results show a reduced P2a that was found unrelated to reality distortion in the previous study of reality distortion. It identifies interference inhibition impairment as being specifically related to sensation seeking. On the other hand, HSS scorers display enhanced fronto-central and normal P600 effects also found in high reality distortion patients. These results indicate inappropriate context processing and mnemonic binding common to sensation seeking and reality distortion. LSS scorers also display a reduced temporal N300 similar to that found in low reality distortion patients. This anomaly could reflect the lower reactivity to emotionally significant stimuli that underlies anhedonia symptoms. Finally, the N400 effect and a late frontal effect are found in both HSS and LSS. Since they were unrelated to reality distortion, these indices have been related to basic aspects of schizophrenia, e.g., deficient knowledge integration, or other mechanisms, e.g. anxiety or impulsivity. In summary, the present study examines the strategy of investigating variables, such as temperamental characteristics, in addition to symptoms, to show how discrete impairments may contribute to the expression of the illness.

خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.