Specifične teškoće učenja i cerebelarna teorija - uvid u zadatke ravnoteže i motorike

Abstract

The cerebellar deficit hypothesis, proposed by Nicolson and Fawcett (1996; 1999), suggests that dyslexia, one of the most frequent specific learning disabilities, involves general impairment in the ability to perform skills automatically, which several studies have linked to the cerebellum. Disorders in cerebellar development may lead to impairments in reading and writing that are key features of dyslexia and other specific learning disabilities, which would be consistent with the presumed role of the cerebellum in language-related skills. The cerebellum has traditionally been considered as a motor area, so performance on motor and balance tasks may be a way to assess problems in cerebellar function associated with specific learning impairment. The aim of the present study was to determine whether there are differences in performance on balance and motor tasks (Yap and van der Leij, 1994; Ramus and colleagues, 2003) between students with specific learning disabilities (N=32) and typically developing students (N=32), as well as to determine whether performance in both groups correlates with reading skills. Students were in the fourth grade of elementary school in Zagreb, Croatia. Typically developing students achieved a significantly higher total score on balance and motor tasks than students with specific learning disabilities (Mann Whitney U test), supporting the cerebellar deficit hypothesis. In addition, performance on balance and motor tasks correlated significantly with performance on reading tasks (Spearman’s rank correlation). Further research is needed to clarify these correlations and why they occur.