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Yıl:1999; Cilt: 14; Sayı: 43>> Özet
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Türk Psikoloji Dergisi; 1999;14(43):61-67
Kronik Diazepam Uygulamasının ve Diazepam Yoksunluğunun Kaçınma Davranışı Üzerindeki Etkisi
B Ayvaşık, Ü Zagli, Ö Palaoğlu, H Soygür, IH Ayhan
Orta Doğu Teknik Üniversitesi, Ankara
Bu araştırmanın temel amacı, düşük dozda kronik diazepam (DZ) uygulamasının ve diazepamdan yoksunluğun sıçanların iki yönlü şok kutusundaki kaçınma davranışı üzerindeki etkisini incelemektir. Yirmi dört sıçan seçkisiz olarak üç gruba (1 mg/kg DZ, 2 mg/kg DZ, kontrol grubu) ayrılmış, tüm sıçanlar kutunun zeminindeki ızgaralardan verilen elektrik şokundan (0.8 mA), kutunun içinden bir bölmeden diğerine geçerek kaçınmaları için eğitilmişlerdir. Yedi günlük bir süre içinde verilen 5 oturumluk bir eğitimden sonra, kronik ilaç uygulamasına başlanmıştır. Yirmi sekiz gün boyunca birinci gruba 1 mg/kg DZ (DZ1), ikinci gruba 2 mg/kg DZ (DZ2) ve üçüncü gruba (kontrol grubu -KONT grubu) ise ilacın çözüldüğü eriyik verilmiştir. Bütün hayvanlar, kronik ilaç uygulamasının 1., 7., 14., 21. ve 28. günlerinde test edilmişlerdir. Yirmi sekiz günlük ilaç uygulamasından hemen sonra, iki haftalık DZ'den yoksunluk başlatılmıştır ve bütün hayvanlar yoksunluğun 1., 4., 7. ve 14. günlerinde test edilmişlerdir. DZ 'nin akut uygulaması kaçınma davranışı üzerinde herhangi bir etki yaratmamıştır. Ancak ilaç uygulamasının ilk gününde tüm gruplar için (KONT, DZ1 ve DZ2 grupları) kaçınma davranışında bir artış gözlenmemiştir. DZ’nin kronik uygulamasının ve DZ'den yoksunluğun da kaçınma davranışını etkilemediği gözlenmiştir. Bu bulgunun, denek sayısının az olması, deney süresince denek kaybının ortaya çıkması, eğitimde tavan etkisi, enjeksiyonun başlamasının ve/veya sona ermesinin yarattığı anksiyojenik etki gibi karıştırıcı değişkenlere bağlı olabileceği tartışılmıştır.
Effects of Chronic Diazepam Treatment and Withdrawal on Avoidance Behavior
The present study was designed to evaluate the effects of chronic diazepam (DZ) treatment with low doses and diazepam withdrawal on the two-way shuttle-box avoidance performance in rats. After 24 rats were randomly assigned into three groups (1 mg/kg DZ, 2 mg/kg DZ and control groups), all animals were trained to avoid from an electrical foot shock (0.8 mA) delivered through the grid floor by Crossing to the other compartment of the box. Following the avoidance training, the first group received 1 mg/kg DZ (DZ1), the second group received 2 mg/kg DZ (DZ2), and the control group (CONT group) was given a vehicle chronically for 28 davs. All rats were tested on the lsl, 7lh, 14'h, 21th and 28/h davs of clironic treatment. Following chronic DZ treatment, two weeks of withdrawal from chronic DZ treatment started and all animals were tested on the lsl, 4,r\ 7lh, and 14lh days of withdrawal. Acute administration of DZ did not produce any impairment on avoidance performance. However, all groups showed a significant increment in avoidance performance for the first day of drug administration. Neither chronic administration of DZ nor withdrawal from it had a significant effect on avoidance performance. These findings were discussed by taking potential confounding variables, such as subject loss throughout the experiment, ceiling effect of training, amiogenic effect of beginning, and discohtinuation of injection, into consideration.

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