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Yıl:2014; Cilt: 1; Sayı: 1>> Özet
TAM METİN
Türk Uyku Tıbbı Dergisi; 2014;1(1):9-15
Ağrısız Dokunsal Uyaranlar ve Uyku
G İnanç, M Özgören, A Öniz
Dokuz Eylül Üniversitesi, İzmir
Giriş: Çalışmanın amacı uyku sırasında uygulanan ağrısız dokunsal uyaranlara karşı beyinde oluşan elektrofizyolojik yanıtları incelemektir. Gereç ve Yöntem: Çalışmaya 15 sağlıklı gönüllü birey (8 kadın, yaş ortalamaları: 22,13±1,41) katılmıştır. Kayıtlar, NuAmps 40 kanallı kayıt sistemi, pnömatik uyarıcı ünitesi (Somatosensory Stimulus Generator 4-D Neuroimaging), Embedded Microcontroller Stimulation Unit (EMISU), video kayıt sistemi ve analiz bilgisayarı gibi ek teknik donanım kullanılarak gerçekleştirilmiştir. Sabit basınçta (140 kPa) ağrısız uyaranlar sağ el işaret ve orta parmaklarına uygulanmıştır. Parmaklardan birine seyrek uyaran olarak uygulama yapılmıştır (%25). Sürekli elektroensefalografi (EEG), elektrookülografi (EOG), elektromiyografi (EMG) kayıtları Amerikan Uyku Tıbbı Akademisi (AASM) kurallarına göre uyku evrelerine ayrılmıştır. Somatosensoriyel öncelikli alanlar olarak C3 ve C4 elektrotlarında meydana gelen yanıtlar incelenmiştir. İstatistiksel analizlerde bağımlı gruplarda t testi kullanılmıştır. Bulgular: Yüzeyel ve derin uykuda hem seyrek hem de sık uygulanan uyaranlara karşı N100, P200, N300, P450, N550, P900 ve Ngeç dalga formları açıkça gözlenmiştir. Sağ elde, her iki uyarana karşı elde edilen yanıtlar birbirine benzer olarak bulunmuştur. Sonuç: Uykuda beyin yanıtlılığı sürmekte ancak elektrofizyolojik yanıt paterni değişiklik göstermektedir. Ayrıca, uykuda yönlendirilmiş dikkat, uyaran ayırt etme, çalışan bellek gibi süreçlerin istemli olarak kullanılamaması her iki uyarana karşı olan yanıtın birbirine benzer olmasına neden olmaktadır.
Non-Painful Tactile Stimuli and Sleep
Introduction: The aim of this study is to examine electrophysiological responses in the brain to painless somatosensory stimulation during sleep. Materials and Methods: Fifteen healthy volunteers (8 female, with mean age: 22.13±1.41) participated in the study. Recordings were carried out using NuAmps 40 channeled recording system, pneumatic stimulation unit (Somatosensory Stimulus Generator 4-D Neuroimaging), Embedded Microcontroller Stimulation Unit (EMISU), and additional equipment such as video recording system and analysis computer. Painless air pressure stimulation was applied at constant pressure rate to the fore and middle fingers of the right hand. Infrequent oddball stimulation was applied to one of the fingers (%25 of the time). Continuous electroencephalography (EEG), electrooculography (EOG) and electromyography (EMG) recordings were sorted into sleep phases according to the guidelines set by the American Academy of Sleep Medicine (AASM). Responses recorded from the C3 and C4 electrodes were examined as somatosensory regions of priority. Paired samples T-tests were used for statistical analysis. Results: N100, P200, N300, P450, N550, P900 Nlate wave forms were clearly observed for both frequent and infrequent stimuli in light and deep sleep. Responses to both target and non-target stimuli on the right hand were found to be similar to each other. Discussion: Brain responsiveness continues in sleep; however electrophysiological response pattern can vary. Furthermore as processes such as directed attention, stimulus discrimination and working memory cannot be voluntarily employed during sleep; responses to both kinds of stimuli are similar to one another.

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