Radyofrekans Işımanın (900 MHz) Kurbağa Siyatik Siniri Üzerine Elektrofizyolojik Etkileri

Yıl 2008, Cilt: 1 Sayı: 2, 37 - 41, 01.06.2008

Ali Aşkın Ülkü Çömelekoğlu Yusuf Çamlıca

Öz

AbstractElectrophysiological Effects of Radiofrequency Radiation (900 MHz) on Frog Sciatic Nerve Objective: In this study, it was aimed to investigate the compound action potential parameters in isolated sciatic nerve of frog (Rana ridibunda) after exposure to 900 MHz radiofrequency radiation. Methods: 14 adult frogs were divided into two independet groups. For each group 7 animals were used. Group 1 included control. Group 2 (radiofrequency exposed group) was exposed to 900 MHz radiofrequency radiation for 4 h/day for 10 days. Control group was kept under the same environmental conditions as the study group except with no radiofrequency radiation exposure. At the end of the study isolated sciatic nerves were stimulated with 0.5 ms supramaximal pulses and action potential parameters as pick to pick amplitude, duration of depolarization and repolarization as well as area were measured with extracellular recording techniques. Results: In the radiofrequence group, the values of amplitude and area were significantly lower than the values of the control group. However, there were no significant changes in values of the duration of depolarization and repolarization of action potential in the sciatic nerves. Conclusion: These findings indicate that 900 MHz radiofrequency emitting mobile phones reduced the amplitude and area, but they have no effect on the duration of depolarization and repolarization of action potential in isolated frog nerve.

Anahtar Kelimeler

radiofrequency radiation, cellular phone, action potentials, sciatic nerve

Radyofrekans Işımanın (900 MHz) Kurbağa Siyatik Siniri Üzerine Elektrofizyolojik Etkileri

Öz

Türkçe Özet:Amaç: Bu çalışmada, 900 MHz radyofrekans ışımanın kurbağa (Rana ridibunda) siyatik sinir bileşik aksiyon potansiyeli üzerine etkisinin incelenmesi amaçlanmıştır. Yöntem: On dört yetişkin kurbağa, her biri 7 hayvandan oluşan iki bağımsız gruba ayrılmıştır. 1. grup kontrol grubu, 2. grup 10 gün süreyle günde 4 saat 900 MHz radyofrekans ışıma uygulanan deney grubundan oluşmuştur. Kontrol grubu aynı gün ve sürede radyofrekans ışıma uygulanmadan aynı çevresel koşullarda tutulmuştur. Uygulama süresi sonunda izole siyatik sinirler, 0.5 ms süreli supramaksimal pulslarla uyarılmıştır. Hücre dışı kayıt yöntemi kullanılarak kaydedilen aksiyon potansiyellerinden tepeden tepeye genlik, depolarizasyon süresi, repolarizasyon süresi ve alan ölçülmüştür. Bulgular: Radyofrekans ışıma uygulanan gruptaki aksiyon potansiyeli değişkenlerinden genlik ve alan kontrol grubuna göre anlamlı olarak azalmıştır. Depolarizasyon ve repolarizasyon sürelerinde ise anlamlı bir fark bulunmamıştır. Sonuç: Bu bulgular mobil telefonlardan yayılan 900 MHz radyofrekans dalgalarının siyatik sinir aksiyon potansiyellerinin genliği ve alanını azalttığını, ancak depolarizasyon ve repolarizasyon sürelerini değiştirmediğini göstermiştir.

Anahtar Kelimeler

radyofrekans radyasyon, cep telefonu, aksiyon potansiyeli, siyatik sinir.

Kaynakça

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