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Yıl:1995; Cilt: 32; Sayı: 4>> Özet
Nöropsikiyatri Arşivi; 1995;32(4):171-175
Demansta ve Yaşlılarda P300
S Özkaynak, U Kahvecioğlu, S Balkan, K. Yaltkaya
Akdeniz Üniversitesi Tıp Fakültesi Nöroloji Anabilim Dalı
Bilişsel yetersizlik gösteren 12 demanslı ve 10 yaşlı olguda ve 36 sağlıklı yaşlı kontrolda olaya ilişkin endojen potansiyellerden biri olan işitsel P300 potansiyelini değerlendirdik. Demanslı olgularda, sağlıklı yaşlılara göre, Fz ve Cz elektrot konumlarında P300 latansında uzama ve amplitüdünde düşme saptadık. Bilişsel yetersizlik gösteren yaşlılar ile sağlıklı yaşlılar arasında ise P300 latans ve amplitüdünde anlamlı bir farklılık yoktu. Bulgularımıza göre, P300, bilişsel yetersizliği göstermede nesnel bir testtir ve yetersizlik belirginleştikçe P300 latansı da daha fazla uzamaktadır. Demanslı olgularda bir dizi P300 kayıtlaması ile hastalığın gidişini ve sağaltıma yanıtı değerlendirmek mümkün olabilir.
P300 In Dementia And Elderly
An event related potential, auditory P300 were investigated in 12 demented and 10 elderly subjects who have cognitive impairment and 36 elderly healthy controls, Demented subject had longer P300 latencies and smaller amplitudes at Fz and Cz elektrode sites than control group. P300 latencies and amplitudes were not significantly different between elderly subjects who have cognitive impairment and healthy elderly controls. Our findings indicate that P300 is an objective test to show cognitive decline and P300 latency becomes longer as cognitive impairment becomes more pronounced. In dementia; serial testing of P300 can provide a means of assessing changes in disease activity and response to medical treatment.

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