Journals / Nöropsikiyatri Arşivi / 2008 / Cilt: 45 - Sayı: 3

Evaluation of cognitive functions in subclinical hypothyroidism by event related potentials

Subklinik hipotiroidizmde bilişsel işlevlerin olay ilişkili potansiyeller ile değerlendirilmesi

Pages
69–71
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

New studies comprising a large number of patients are needed to clarify the issue.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: The cognitive impairment in overt hypothyroidism such as slowed information processing speed, reduced efficiency in executive functions and poor learning, are well supported by previous studies.
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Key Findings & Data:Method: Fifteen subclinical hypothyroid patients (normal T3 and T4 levels with elevated TSH levels) and age matched 20 healthy individuals were recruited into the study.
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Conclusion & Impact:New studies comprising a large number of patients are needed to clarify the issue.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Olaya ilişkin potansiyeller · P300 · Uyarılma potansiyelleri

Abstract

Objective: The cognitive impairment in overt hypothyroidism such as slowed information processing speed, reduced efficiency in executive functions and poor learning, are well supported by previous studies. The degree to which subclinical hypothyroidism affects the cognitive functions remains controversial. In this study, we aimed to assess the cognitive impairment in the subclinical hypothyroid patients by using event related potentials. Method: Fifteen subclinical hypothyroid patients (normal T3 and T4 levels with elevated TSH levels) and age matched 20 healthy individuals were recruited into the study. Cognition (speed of information processing, cognition processing capacity and perceptual processing resources) was studied using the techniques of auditory event-related potentials (P300 latency and amplitude) which were recorded from 6 EEG leads in an odd-ball paradigm. Results: The P200, N200 and P300 latencies and amplitudes of both groups showed no significant difference (p>0.05). No correlation was found between thyroid hormones and P300 latencies. Conclusion: There are contradictory results about the cognitive impairment in subclinical hypothyroidism. Our study revealed that subclinical hypothyroidism does not impair cognitive processes measured by the P300 study. New studies comprising a large number of patients are needed to clarify the issue.

Özet

Amaç: Aşikar hipotiroidizmde yavaşlamış bilgi değerlendirme hızı, yürütücü işlevlerde azalmış etkinlik ve öğrenme yeteneğinde zayıflama gibi bilişsel yetersizlik olabileceği yapılmış çalışmalarda gösterilmiştir. Subklinik hipotiroidizmin ise bilişsel işlevleri ne derece etkilediği belirsizdir. Bu çalışmada subklinik hipotiodizmi olan hastalarda olay ilişkili potansiyeller kayıtlanarak bilişsel yetilerdeki değişikliğin belirlenmesi amaçlandı. Yöntem: Çalışmaya 15 subklinik hipotiroidisi olan (normal T3 ve T4 hormon düzeyleri ile birlikte yüksek TSH düzeyi) ve yaşça eşlenmiş 20 sağlıklı birey alındı. Olgulara bilgi değerlendirme hızı, bilişsel değerlendirme kapasitesi ve algı yeteneği gibi bilişsel yetilerin ölçülebilmesi açısından yeterliliği gösterilmiş olan, işitsel olay ilişkili potansiyel kayıtlaması (P300 amplitüd ve latansı) yapıldı. Kayıtlama “odd-ball” paradigması ile 6 EEG elektrodu üzerinden gerçekleştirildi. Bulgular: İki grubun P200, N200 and P300 latans ve amplitüdleri arasında anlamlı bir fark gözlenmedi (p>0.05). Tiroid hormonları ile P300 latansları arasında bir ilişki bulunmadı. Sonuç: Subklinik hipotiroidizmde bilişsel yetilerde değişim ile ilgili çelişkili bildirimler mevcuttur. Bizim çalışmamız olay ilişkili potansiyeller ile değerlendirilebilen bilişsel fonksiyonlarda bir bozulma olmadığını göstermektedir.

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Cite This Article

GÜLDİKEN, B., GÜLDİKEN, S., TAŞKIRAN, B., PEYNİRCİ, H., TURGUT, N., TUĞRUL, A. (2008). Evaluation of cognitive functions in subclinical hypothyroidism by event related potentials. Nöropsikiyatri Arşivi, Cilt: 45 - Sayı: 3, 69–71. https://ajindex.com/articles/294449

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