Cannot perform motor movements to command, with lesions to the left posterior parietal lobe or corpus callosum, corresponds to which apraxia?

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Ideomotor apraxia is illustrated when a person understands the command and can use objects in real life, but cannot translate a verbal or pantomimed command into the correct movement. Damage to the left posterior parietal region disrupts the mapping from a stored motor plan to actual motor execution, so actions intended on command fail even though the person can conceptually grasp the task. The corpus callosum involvement can worsen this by impairing transfer of planning between brain hemispheres, reinforcing the inability to perform gestures when asked. This differs from ideational apraxia, where the problem is in conceptualizing the task or sequence of steps for using an object, and from constructional apraxia, which is about visuospatial planning in drawing or building rather than producing a directed motion on command. In the scenario described, the hallmark impaired ability to perform motor movements on command points to ideomotor apraxia.