Apraxia part one 33 (Etiology of ideational apraxia )

Ideational apraxia is a complex motor planning disorder where a person loses the "concept" of how to perform a sequence of actions with an object, even if they understand the command and can make individual movements. We have three etiologies of ideational apraxia : 1- Damage of left inferior temporal lobe ( this lesion starts with tools deficit then finishes with tools substitution) and may cause right visual neglect, right side simultanagnosia and Lexical Agraphia in addition to ideational apraxia, 2- Damage of left supplementary motor area ( this lesion starts with plan deficit then finishes with plan substitution) and may cause Right homonymous visual-motor attention deficit, ideational apraxia and agraphia, 3- Damage of left posterior precuneus cortex (it causes tools deficit and plan deficit), it causes ideational apraxia plus ideomotor apraxia, inner seeing agnosia and agraphia.