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Yıl:2019; Cilt: 56; Sayı: 2>> Özet
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Nöropsikiyatri Arşivi; 2019;56(2):86-91
Bipolar Bozuklukta Iraksak ve Yakınsak Düşünme Sırasında Fonksiyonel Yakın Kızıl ÖtesiSpektroskopi İle Ölçülen Prefrontal Aktivite
YH Alıcı, HD Özgüven , E Kale , I Yenihayat , B Baskak
Şehit Ahmet Özsoy State Hospital, Ankara
Amaç: Biyografik araştırmalar ve bazı kontrollü çalışmalar bipolar bozukluk (BB) ve yaratıcılık arasında bir ilişki olabileceğine işaret etmektedir. Bu ilişkinin nörobiyolojik temelleri açık değildir. Yaratıcılığın tanımı konusunda uzlaşı olmasa da yakınsak ve ıraksak yaratıcılığı ölçmek amacıyla alternatif kullanımlar testi (AuT) ve uzak ilişkili düşünme testi (RAT) sıklıkla kullanılmaktadır. Bu çalışmada, BB vakalarında AuT ve RAT sırasında prefrontal korteks (PFC) aktivitesinin fonksiyonel yakınkızılötesi spektroskopi (fNIRS) aracılığı ile incelenmesi amaçlanmıştır. Yöntem: Remisyonda olan 31 BB olgusu ve 27 sağlıklı kontrol çalışmaya alınmıştır. Katılımcıların ıraksak ve yakınsak düşünme görevleri sırasında (AuT ve RAT uygulanırken) sergiledikleri PFC aktivitesi fNIRS aracılığı ile kaydedilmiştir. Biz özellikle, bu iki görev alanına göre PFC içindeki aktivitenin antero-posterior ayrışmasıyla ilgilenmekteydik. Bulgular: Hasta grubun hem AuT hem de RAT sırasında sağlıklı kontrollere göre daha düşük performans sergiledikleri görülmüştür. AuT ve RAT iki grupta farklı aktiviteler ile ilişkiliydi. Vaka grubunda RAT sırasında, kontrol grubunda ise AuT sırasında anterior PFC (aPFC) aktivitesi posterior PFC (pPFC) aktivitesinden daha yüksek bulunmuştur. aPFC aktivitesi vaka grubunda RAT performansı ile negatif korelasyon göstermektedir. Sonuç: aPFC’deki aktivite artışı, BB’de düşük yakınsak yaratıcılık performansının nöro-anatomik korelatı olabilir. Yaratıcılık, bipolar bozukluk, işlevsel yakın kızılötesi spectroskopi
Prefrontal Activity Measured by Functional Near Infrared SpectroscopyDuring Divergent and Convergent Thinking in Bipolar Disorder
Introduction: Biographical research as well as some controlled studies point out to a relationship between bipolar disorder (BD) and creativity. Neurobiological underpinnings of this relationship are unclear. Although there is no consensus on the definition of creativity, Alternative uses Test (AuT) and Remote Association Test (RAT) are frequently used to measure convergent and divergent creativity. We aimed to examine prefrontal cortex (PFC) activity with functional near-infrared spectroscopy (fNIRS) during the RAT and AuT tests in subjects with BD. Methods: We measured PFC activity in subjects with remitted BD (N=31) and healthy control subjects (N=27) with fNIRS during divergent and convergent thinking tasks (AuT and RAT respectively). We were particularly interested in the antero-posterior dissociation of the activity within the PFC according to the two task domains. Results: We found that the index subjects displayed lower performance than healthy controls during the AuT and the RAT. AuT and RAT were associated with different activities in the two groups. Anterior PFC (aPFC) activity was higher than posterior PFC (pPFC) activity during the RAT in the index group, and during the AuT in the control group. aPFC activity was negatively correlated with the RAT performance in the index group. Conclusion: Higher activity in the aPFC may be the functional neuroanatomical correlate of low convergent creativity performance in BD

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