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Yıl:1999; Cilt: 36; Sayı: 3>> Özet
Nöropsikiyatri Arşivi; 1999;36(3):140-145
Parkinson hastalığında işitsel olaya bağlı potansiyeller
A Soysal, T Atay, H Altıntaş, F Özer, B Arpacı
Bakırköy Ruh ve Sinir Hastalıkları Hastanesi
Bu çalışmada, idiopatik Parkinson hastalığı (PH) ta­nısı ile izlenen 30 hasta (21E, 9K) ve 10 (4E, 6K) nor­mal gönüllü denekden oluşan kontrol grubu, önce kısa mental durum testi (KMDT) uygulanıp sonra işitsel olaya bağlı potansiyellerin P300 komponenti çalışılarak, PH'da kognitif fonksiyonların değerlendi­rilmesi amacıyla karşüaştınlmıştır. Hoehn - Yahr sı­nıflamasına göre PH grubundaki hastaların 20'si Ev­re I, 10'u Evre ITde idi. PH grubunun KMDT ortala­ması kontrol grubundan düşük olmasına rağmen aralarındaki fark anlamlı bulunmadı. PH grubunda­ki hastaların Fz ve Cz'den kaydedilen Nl, P2, N2 ve P3 latanslar normallerden daha uzun bulunmasına rağmen aralarındaki fark istatistiksel olarak anlamlı değildi. PH grubunda Cz'den kaydedilen N2/P3 amp-litüdü normallere göre sınırda düşük bulundu (p: 0.0528). Fz'den kaydedilen N1/P2, P2/N2, N2/P3 amplitüdleri ve Cz'den kaydedilen N1/P2, P2/N2 amplitüdleri de normallerden düşük olmasına rağ­men aralarındaki fark istatistiksel olarak anlamlı bu­lunmadı. PH grubunda Cz'den kaydedilen N2/P3 amplitüdü ile hastaların yaşı arasında negatif kore­lasyon saptandı. Çalışmamız, PH'da işitsel olaya bağ­lı potansiyelin P300 komponentinde etkilenme olabi­leceğini ancak bu etkilenmenin tedavi başlanmamış, "off döneminde ve ileri evrelerdeki hastalarda daha belirgin olabileceğini düşündürmüştür.
Auditory Event - Related Potentials In Parkinson's Disease
In this study, 30 patients (21 male, 9 female) with idi­opathic Parkinson's disease (PD) and 10 healthy vo­lunteers (4 male, 6 female) were compared in order to assess the cognitive functions in PD by giving the Short Test of Mental Status (STMS) and evaluating the P3 component of auditory event-related potenti­als. In the PD Group, 20 patients were in stage I and 10 in stage II according to the Hoehn-Yahr scale. Alt­hough the mean of the STMS score in PD group was lower than that of normal controls, the difference was not statistically significant. The Nl, P2, N2 and P3 la­tencies recorded from Fz and C2 were longer in PD group, but the difference was also not statistically si­gnificant. Comparing with the controls, lower N2/P3 amplitudes recorded from Cz in PD group showed a tendency toward significance (p: 0.0528). The N1/P2, P2/N2, N2/P3 amplitudes recorded from Fz and the N1/P2, P2/N2 amplitudes recorded from Cz in PD group were found to be lower than that of the control group, yet the difference was unsignificant. There was a negative correlation between the N2/P3 ampli­tude recorded from Cz and the age of PD patients. These results suggest that the P300 component of auditory event-related potentials may be effected in Parkinson's disease; but further studies with untre­ated PD patients being in "off periods and advanced stages may reveal more reliable information.

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