Abstract
This paper is devoted to the reconsideration of the “classical ” nosological ideational / ideomotor apraxia classification, and proposes the dissection of them from three points of view. First, it was described that the tests for apraxia and the patterns of these disorders must be carefully considered in three points : action category, input-stimulus / output combinations, and error pattern analysis. Second, Liepmann's model has been recently expanded, and apraxia could be caused by seven possible reasons. The expanded Rothi-Ochipa-Heilman's model is helpful for comprehending the patterns of disorders and the pathogenetic mechanism. Lastly, relationships between apraxia and other neuropsychological deficits were mentioned, and these other deficits must not to be excluded, but to be included for understanding the praxis-processing completely. Overall, for these reasons, ideational / ideomotor apraxia simplistic nosological classification should be practically nullified.
