دانلود مقاله ISI انگلیسی شماره 58507
عنوان فارسی مقاله

ثبات رفلکس وحشت زدگی صوتی، مهار پیش پالس و عادت در اسکیزوفرنی

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
58507 2002 9 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Stability of the acoustic startle reflex, prepulse inhibition, and habituation in schizophrenia
منبع

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

Journal : Schizophrenia Research, Volume 55, Issues 1–2, 1 May 2002, Pages 129–137

کلمات کلیدی
اسکیزوفرنی؛ پردازش اطلاعات؛ مهار پیش پالس؛ قابلیت اطمینان
پیش نمایش مقاله
پیش نمایش مقاله ثبات رفلکس وحشت زدگی صوتی، مهار پیش پالس و عادت در اسکیزوفرنی

چکیده انگلیسی

Prepulse inhibition (PPI) of the acoustic startle reflex has been proposed as a neurophysiological measure of sensorimotor gating. There is high test–retest reliability of both startle magnitude and PPI in non-psychiatric subjects. The present study examined the stability of the acoustic startle reflex and its modulation in patients with schizophrenia. Startle measurements were performed in 19 chronic schizophrenic patients on stable medications and 24 healthy control subjects, three times at one-month intervals. PPI trials with various intervals between the prepulse and the startle stimulus (30, 60, 120, 240, and 2000 ms) were used. Intraclass correlation coefficients (ICC) were computed to assess stability. There was a good test–retest reliability of PPI in both schizophrenic patients (Mean ICC: 0.75) and control subjects (Mean ICC: 0.71). Acoustic startle magnitude was the most stable measure across sessions (Mean ICC schizophrenics: 0.89; Mean ICC controls: 0.89). In both groups, a good test–retest reliability was found in the startle latencies. Habituation and prepulse-induced shortening of latencies exhibited moderate stability. Schizophrenic patients exhibited significantly less PPI than control subjects in the 60 ms prepulse condition. This PPI deficit was evident in all three sessions. These results indicate that PPI is a stable neurobehavioral measure in chronic schizophrenic patients in the absence of changes in clinical state.

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