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Koreye bazal ganlionlardaki direkt ve indirekt yollar arasındaki dengenin bozulması sebep olmaktadır. Kontralateral bazal ganglionlar, talamus veya bunların birlikte olduğu lezyonların sorumlu tutulduğu kore, metabolik ve vasküler hastalıklar ile nörodejeneratif ya da herediter hastalıkların seyrinde gözlenebilir. Hiperkinetik hareket bozuklukları akut inme sonrası nadir olarak bildirilmekle birlikte serebrovasküler hastalık sonucu en sık gelişen hiperkinetik hareket bozuklukluğu hemikoredir. Bu olgu sunumunda talamik iskemik inme sonrası sol vücut yarısında koreiform hareketlerle başvuran iki olgu paylaşılmıştır.

20 years old female patient, who had operated from congenital syndactyly on her left hand at five age, admitted to neurology policlinic with involuntary movement on her hands. We saw mirror movement (MM) when she writing, catching with her left hand. This movement is had low amplitude in the right hand than left. Cervical MRG revealed no abnormality. Brain MRG revealed right middle, inferior cerebellary peduncle, olive and pyramid hypoplasia. Mirror movement shows homolog muscle activity which simulating contralateral movement, during a spesific task. This movement is seen usually upper extremity especially in the hand. Corticospinal tract dysfunction is often considered in the pathogenesis. MM may present as part of cervico medullary junction abnormality, cerebral palsy, cerebrovasculary disease, Parkinson disease. We wanted to discuss the patogenesis of MM in our patient with syndactyly and MRG abnormality.