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Yıl:2022; Cilt: 33; Sayı: 4>> Özet
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Türk Psikiyatri Dergisi; 2022;33(4):280-289
Hafif Davranışsal Bozulma: Demans Öncülü Yeni Bir Sendrom
A Aytulun, ŞÖ Erden Aki
Hacettepe Üniversitesi, Ankara
Bu gözden geçirme yazısında demans öncesi prodromal belirtiler olarak nöropsikiyatrik belirtilerin tartışılması, “Hafif Davranışsal Bozulma” kavramının tanımlanması, “Hafif Davranışsal Bozulma Tarama Listesi”nin tanıtılması amaçlanmıştır. Nöropsikiyatrik belirtiler (NPB) demans hastalarındaki bilişsel olmayan belirti ve davranışları temsil eder. Demansa eşlik eden NPB’lerin sıklığı hastalık ilerledikçe artmaktadır. Çalışmalar NPB’lerin demans hastalarının yanı sıra bilişsel yakınması olmayan yaşlılarda, öznel bilişsel yakınması olan ya da hafif bilişsel bozulma tanısı konmuş kişilerde de görüldüğünü ortaya koymaktadır; bu bulgulardan yola çıkarak henüz bilişsel belirtilerin ortaya çıkmadığı olgularda demans gelişimini yordamak için bu belirtilerin tanımlanması ve saptanmasının kullanışlı olabileceği düşünülmüştür. Böylece “Hafif Davranışsal Bozulma” ilk kez Taragano ve Allegri tarafından tanımlanmış, ileri yaştaki kişilerde en az 6 ay süre ile görülen ve herhangi bir başka psikiyatrik sendromun tanı kriterlerini karşılamayan nörodavranışsal belirtileri kapsayan bir kavram olarak ortaya konulmuştur. Değerlendirilmesi amacıyla yakın zamanda apati, duygudurum, dürtü kontrolünde bozukluk, sosyal uygunsuzluk, anormal düşünce ve algı alanlarını kapsayan, 34 sorudan oluşan “Hafif Davranışsal Bozulma Tarama Listesi (HDB-TL)” geliştirilmiştir. Bu alt alanların nörobiyolojik temelleri ve biyobelirteçlerle ilişkisine yönelik çalışmalar kavramın tanımlanması ve HDB-TL’nin geliştirilmesi ile hız kazanmıştır. Ancak kavram henüz çok yenidir ve kişilerin bu sendrom açısından değerlendirilmeleri sürecinde gereksiz tanı almaları ve damgalanma riskiyle karşılaşmaları muhtemeldir. Bu nedenle geniş örneklemlerde çalışmaların yapılmasına ihtiyaç vardır. Bu kavramın geçerliliğinin ortaya konulması, klinik araştırmalarda henüz bilişsel yakınması olmayan nörodejeneratif hastalık olgularını çok erken evrede yakalama amacına da hizmet edecektir.
Mild Behavioral Impairment: A New Prodromal Syndrome forDementia
In this review, it is aimed to discuss neuropsychiatric symptoms as prodromal symptoms of dementia syndromes, to define the concept of ‘Mild Behavioral Impairment’, and to introduce the ‘Mild Behavioral Impairment Checklist’. Neuropsychiatric symptoms (NPS) represent non-cognitive symptoms and behaviors in dementia patients. The frequency of NPS accompanying dementia increases as the disease progresses. Studies reveal that NPS are seen in patients with dementia as well as in the elderly without cognitive complaints, individuals with subjective cognitive complaints, and individuals diagnosed with mild cognitive impairment. Based on these findings, identifying and detecting these symptoms were thought to be useful in predicting the development of dementia in cases where cognitive symptoms have not yet appeared. ‘Mild Behavioral Impairment’ was first defined by Taragano and Allegri, and it was introduced as a concept that includes neurobehavioral symptoms seen in elderly people for at least 6 months and that do not meet the diagnostic criteria of any other psychiatric syndrome. Mild Behavioral Impairment Checklist (MBI-C) has been developed recently which consists of 34 questions including apathy, mood, impulse dyscontrol, social inappropriateness, abnormal thinking, and perception. Studies on the neurobiological basis of these sub-domains and their relationship with biomarkers gained momentum with the definition of the concept and the development of MBI-C. However, the concept is still very new and it is possible for people to be over-diagnosed and to face the risk of stigmatization during the evaluation. Therefore, studies with large samples are needed. Demonstrating the validity of this concept will also serve the purpose of identifying the subjects with a neurodegenerative disease without any cognitive complaints yet at a very early stage in clinical studies.

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