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Yıl:2019; Cilt: 9; Sayı: 1>> Özet
Psikiyatride Güncel; 2019;9(1):7-18
Temel nörobiyolojik kavramlar
A Ertuğrul
Hacettepe Üniversitesi, Ankara
Duygu, düşünce ve davranışla ilgili değişikliklerin görülebildiği ruhsal hastalıklar beyin işlevlerinde bozulmanın sonucu olarak ortaya çıkmaktadır. Ruhsal hastalıkların oluşumunda rol alan süreçleri ve mekanizmaları anlayabilmek için beynin normal işleyişini anlamak gereklidir. Beyinde farklı bölgeler farklı işlevler için özelleşmiş olmakla birlikte, bu bölgelerin etkin çalışması, nöronlar arası mikro devrelerden, bölgeler arası makro devrelere kadar birbirleriyle ilişkilerini sağlayan geniş ağların düzenli işleyişine, bu işleyişin uygun şekilde düzenlenmesine ve değişebilmesine bağlıdır. Prefrontal korteks, bazal ganglionlar, limbik sistem gibi yapılar davranışın nörobiyolojisinde önemli rolü olan beyin bölgeleridir. Sinir sisteminin temel yapıtaşı olan nöronların birbiriyle haberleşmesinde ise glutamat, GABA, dopamin, noradrenalin, serotonin, asetil kolin gibi nörotransmiterler rol almaktadır. Beyin değişebilme becerisi olan dinamik bir yapıdır ve bu değişim uyumsal olan veya olmayan sonuçlara neden olabilir. Bu yazıda, ruhsal bozuklukların patofizyolojisi ve tedavisine yönelik bilgileri anlamakta yol gösterici olabilecek temel bazı nörobiyolojik
Basic neurobiological concepts
Mental disorders in which emotion, cognition and behavior may be affected result from malfunctioning of the brain. Normal functioning of the brain should be studied to understand the processes and mechanisms responsible for mental disorders. Although certain regions of brain are specified for certain functions, the efficient activity of these regions depend on the regular functioning, regulation and plasticity of the broad networks composed of microcircuits between neurons, and macrocircuits between regions, providing their communication. Structures like prefrontal cortex, basal ganglia, limbic system have important roles in neurobiology of behavior. Neurotransmitters like glutamate, GABA, dopamine, noradrenaline, serotonin and acetylcholine are responsible for the communication of the neurons which are basic units of central nervous system. Brain is a dynamic structure which has the ability to change and this change may cause adaptive or maladaptive results. The aim of this review is to explain the basic neurobiological concepts which may be helpful to understand the pathophysiology and treatment of mental disorders, and to make an introduction to the neuroanatomical and neurochemical basis of behavior.

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