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Yıl:2016; Cilt: 53; Sayı: 3>> Özet
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Nöropsikiyatri Arşivi; 2016;53(3):199-204
Bilateral ve Unilateral Hipokampal Sklerozda Kognitif Parametrelerin Karşılaştırılması
E N Vanlı Yavuz, B Bilgiç, Z Matur, N Bebek, C Gürses, A Gökyiğit, Ö Öktem, B Baykan
İstanbul Üniversitesi, İstanbul
Amaç: Son yıllardaki çalışmalar unilateral hipokampal sklerozlu (HS) hastalarda kognitif tutulumun bilindiğinden daha yaygın olduğunu göstermektedir. Amacımız bilateral hipokampal sklerozlu hastalarla unilateral hipokampal sklerozlu hastaların kognitif tutulumlarını karşılaştırmaktır. Yöntem: Klinik olarak epilepsi tanısı almış, MRG kriterlerine (T1’de atrofi ve T2-FLAIR’de hiperintensite) uygun şekilde HS saptanmış ardışık hastalar çalışmaya dahil edildi. Sözel bellek süreçleri testi, Weschsler bellek testinin alt testi olan görsel bellek testi, ileri ve geri sayı menzili, fonemik ve semantik akıcılık ve Stroop testlerini içeren standart nöropsikolojik test (NPT) bataryası uygulanmış olan sağ HS, sol HS ve bilateral HS gruplarında sonuçlar istatistiksel olarak karşılaştırıldı. Bulgular: NPT’leri tamamlayabilen 16 bilateral HS, 36 sağ HS ve 39 sol HS olmak üzere toplam 91 hasta (34 erkek, 57 kadın) dahil edildi. Ameliyat olmuş 43 hastanın 6 ‘sı bilateral HS’ydi. Gruplararası el tercihleri ve eğitim durumlarında istatistiksel farklılık yoktu. Bilateral grubun NPT performansları unilateral gruplara göre daha düşük olmasına rağmen istatistiksel olarak anlamlı değildi. Bilateral HS’li hastaların sağ HS ile kıyaslanmasında sözel bellek süreçleri öğrenme skorunda istatistiksel olarak anlamlı fark olmasına rağmen tanımada fark yoktu. Sağ ve sol HS grubunda bilateral HS ile kıyaslandığında sözel bellek süreçleri testlerinde gecikmeli geri çağırma skorları anlamlı olarak düşüktü. Preoperatif ile postoperatif bulgular kıyaslandığında bilateral grupta istatistiksel anlamlı fark yokken, unilateral grupta birçok alanda bozulma dikkati çekti. Sonuç: Çalışmamız bilateral hipokampal etkilenmenin düşük kognitif performansla ilişkili olduğunu göstermiştir. Hatırlama probleminden çok geri getirme eksikliği şeklindeki kognitif tutulum limbik yapılarla sınırlı kalmayan daha yaygın bir etkilenmeyi düşündürmüştür.
Comparison of Cognitive Parameters between Bilateral and Unilateral Hippocampal Sclerosis
Introduction: Recent studies showed that hippocampal sclerosis (HS) patients with unilateral involvement had more diffuse cognitive impairment than expected. Therefore, we aimed to compare the cognitive profiles of bilateral HS (BHS) patients with unilateral HS (UHS) patients. Methods: Consecutive patients, diagnosed with epilepsy, who fulfilled two major magnetic resonance imaging (MRI) criteria (T1 atrophy and T2- FLAIR hyperintensity) for HS were included. Standard neuro-psychological test (NPT) battery consisted of the Turkish version of 15-word verbal memory processes test, Wechsler memory scale visual reproduction subtest, forward and backward digit span, phonemic and semantic fluency, and Stroop test were applied; and the groups with right HS, left HS, and bilateral HS were compared statistically. Results: Ninety-one patients, completing the NPT (34 males, 57 females)-16 with BHS, 36 with right HS, and 39 with left HS-were included. Six out of 43 operated patients had BHS. There were no significant differences in education and handedness of the groups. Even though NPT performances of the BHS group were found to be poor compared to UHS subgroups, this was beyond statistical significance. Comparison of BHS with the right HS group showed a significant difference in the learning score of the Verbal Memory Processes Test, but recognition scores were found to be similar in all groups. Compared to the BHS group, both right and left HS groups revealed a significant difference in delayed recall score of the Verbal Memory Processes Test. Although there were no significant differences in the postoperative parameters of the BHS group, UHS subgroups had deficits in many postoperative parameters. Conclusion: Our study revealed that bilateral involvement of the hippocampi was correlated with a poor cognitive performance. Retrieval failure, rather than a total recall problem, in the memory of the patients resembles a more diffuse involvement not only limited to limbic structures.

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