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Yıl:2015; Cilt: 5; Sayı: 1>> Özet
TAM METİN
Journal of Mood Disorders; 2015;5(1):16-22
İki uçlu bozukluk hastalarının hasta olmayan kardeşlerinde yürütücü işlev ve hafıza bozuklukları
DU Yıldırım, CA Poyraz, BÇ Poyraz, A Özdemir, A Duran
Sisli Etfal Training and Research Hospital,Istanbul,Turkey
Amaç: İki uçlu bozukluk hastalarında nörobilişsel bozukluklar muhtemel bir endofenotip adayı olarak görülmekte ve bu konuda araştırmalar gitgide artmaktadır. İki uçlu bozukluk hastalarının yakınlarında belirlenen yürüytücü işlevler ve hafızada bozuklukları bu göstergelerin genetik çalışmalarda kullanılabilecek muhtemel endofenotipler olabileceğini düşündürtmektedir. Bu çalışmada iki uçlu bozukluk tip 1 tanısı konulmuş hastaların sağlıklı olan kardeşlerine uygulanan nöropsikolojik değerlendirmeler sağlıklı kişilerden oluşan kontrol grubuyla karşılaştırılmıştır. Yöntem: İki uçlu bozukluk tip 1 tanısı konulmuş 35 hastanın sağlıklı olan kardeşi ve 35 kişiden oluşan sağlıklı kontrol grubuna sözel akıcılık, dikkat, yürütücü işlevler ve hafıza işlevlerine yönelik testler uygulanmıştır. Uygulanan testler arasında Rey İşitsel Sözel Öğrenme Testi, Wechsler Bellek Ölçekleri görsel bellek uzamı alt testi, Stroop Testi, İz sürme testi A ve B formları, Wechsler Zeka Ölçekleri Sayı Dizileri alt testleri, kategorik akıcılık testi (Isaac SET Test) ve saat çizme testi yer almaktadır. Bulgular: İki uçlu bozukluğu olan hastaların sağlıklı kardeşleri, kontrol grubuna göre Rey İşitsel Sözel Öğrenme Testi, Wechsler Bellek Ölçekleri görsel bellek uzamı hatırlama alt testinde, Stroop Testi, İz sürme testi A ve B formları, Wechsler Zeka Ölçekleri Sayı Dizileri düz sayı menzili testinde daha düşük bir başarı sergiledi. Basamaklı lojistik regresyon analizinde TMT-B testindeki başarı tek başına hastaların kardeşlerini sağlıklı kişilerden güçlü bir oranda ayırabiliyordu. Sonuç: İki uçlu bozukluk hastalarının kardeşlerinde İz sürme testi-B ile ölçülen set değiştirme becerisinde önemli bir bozulma bulduk. Çalışma bulgularımıza göre set değiştirme/bilişsel esneklik iki uçlu bozuklukta bilişsel işlevler arasından bir endofenotip adayı olabilir
Impairment of executive functions and memory in unaffected siblings of patients with bipolar disorder
Objective: Neurocognitive impairments in bipolar patients as a possible endophenotype is a growing field of research. Impairments in executive functions and memory have been reported in relatives of patients with bipolar disorder, suggesting that they could be potential endophenotypes for genetic studies. In this study, neuropsychological performance in unaffected siblings of patients diagnosed as bipolar I disorder is compared to that of matched healthy controls. Method: We evaluated 35 unaffected siblings of probands with bipolar I disorder and 35 healthy controls using tests of verbal fluency, attention, executive functions and memory. Rey Auditory Verbal Learning Test (RAVLT), Wechsler Memory Scale-Revised (WMS-R) visual memory test, Stroop Colour-Word Interference test (SCWIT), Trail Making Test-A and B, Wechsler Adult Intelligence Scale-Revised Digit Span test, categoric verbal fluency test (Isaac SET Test) , and clock drawing tests were performed. Results: Unaffected siblings of patients with bipolar disorder performed poorly on the RAVLT, SCWIT, forward Digit Span Test, TMT-A and B, visual recall test. Using stepwise logictic regression TMT-B alone could highly differentiate siblings from controls. Conclusion: We found significant impairment of set shifting task measured with TMT-B in siblings of patients with BD. Our study suggests that set shifting/cognitive flexibility could be a potential cognitive endophenotype for bipolar disorder.

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