Dergi Ara >>
Yıl:2010; Cilt: 21; Sayı: 3>> Özet
TAM METİN
Türk Psikiyatri Dergisi; 2010;21(3):185-194
İlk Atak Depresyon Hastalarında Azalmış Frontal Korteks Hacimleri
MM Bilgi, Ö Özalay, MÇ Eker, Ö Kitiş, E Ozan, Ö Eker, F Şimşek, Dİ Haznedaroğlu, AS Gönül
Ege Üniversitesi Tıp Fakültesi, İzmir
Amaç: Beyin görüntüleme çalışmalarında depresif hastaların frontal alanlarında hacim küçüklüğü ve işlev kaybı
olduğu bildirilmiştir. Tespit edilen bu hacim küçüklüğüne hastalığın yineleyici doğasının ve antidepresan ilaç kullanımının
etkisi net olarak bilinmemektedir. Bu çalışma frontal lob hacim farklarının hastalığın başlangıcından beri
var olabileceği varsayımını sınamak amacıyla ilk atak ve ilaçsız hastalarda gerçekleştirilmiştir.
Yöntem: Çalışmaya ilk atak, psikotrop ilaç kullanmamış, Mental Bozuklukların Tanısal ve Sayımsal El Kitabı (DSM
IV) kriterlerine göre major depresif bozukluk tanısı konulan 23 depresyon hastasıyla; yaş ve cinsiyet dağılımı bakımından
denkleştirilmiş 28 sağlıklı kontrol olgusu alınmıştır. Kraniyal manyetik rezonans (MR) görüntüleri 1,5 Tesla
MR cihazıyla elde edilmiştir. Gri ve beyaz madde hacimlerinin ölçümlerinde Medical Image Processing, Analysis,
and Visualization (MIPAV) adlı bilgisayar yazılımı kullanılmıştır.
Bulgular: Depresyon hastalarında kontrol grubuna göre frontal gri madde hacmi daha küçük bulunmuştur. Beyaz
madde ve toplam kafa içi hacmi her iki grupta da benzer çıkmıştır. Bağlantı analizlerinde küçük frontal gri madde
hacmiyle hastalığın süresi ve şiddeti arasında ilişki bulunmamıştır.
Sonuç: Bu çalışmanın sonuçları ilk atak depresyon hastalarında frontal lob gri madde hacminin hastalık süresinden
ve şiddetinden bağımsız bir şekilde küçük olduğunu göstermektedir. Bu sonuç, frontal loptaki değişikliğin
depresyonun klinik belirtilerin izlenmesinden önce başlamış olabileceğine işaret etmektedir.
Small Frontal Gray Matter Volume in First-Episode Depression Patients
Objective: Brain imaging studies have shown that depressed individuals suffer from inadequate frontal
lobefunctions vis à vis smaller frontal lobes. The effects of depression�s recurrent nature and long-term
antidepressant treatment are not definitely known. This study aimed to examine frontal lobe volume at the onset
of clinical depression by including first-episode drug-naive depressed patients.
Method: The study included 23 first-episode drug-free major depression patients diagnosed according to the
Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) and 28 healthy age- and sex-matched controls.
Cranial magnetic resonance (MR) images were obtained in both groups using a 1.5 Tesla device. Gray and white
matter volumes in the frontal lobes were measured using the Medical Image Processing Analysis and Visualization
(MIPAV) computer program.
Results: Frontal gray matter volume in the patients was lower than that in the control group. White matter and
total intracranial volume did not differ between the 2 groups. Small gray matter volume was not correlated with
the duration or severity of illness.
Conclusion: The results of this study indicate that frontal lobe gray matter volume is low in first-episode depressed
patients and is independent of both illness severity and duration. This result suggests that the observed changes
in the frontal lobe could have occurred before the clinical symptoms of depression were observed.

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