Inability to perform previously learned, sequential motor movements is best described as which condition?

• A. Ideomotor apraxia
• B. Apraxia
• C. Ideational apraxia
• D. Constructional apraxia

Answer: (B)

Apraxia is a disturbance of higher-order motor planning that prevents performing purposeful, learned movements even when there is adequate strength, sensation, and understanding of the task. The scenario described—difficulty carrying out previously learned, sequential motor movements—fits this pattern because the individual has the knowledge and ability to perform the actions but cannot execute the sequence as a coordinated motor plan. This distinguishes apraxia from ideational apraxia, where the problem is the loss of the concept or plan for the task itself (leading to improper sequencing or use of objects), and from ideomotor apraxia, where the person understands the task but cannot perform it on command or imitation, though automatic actions may be preserved. Constructional apraxia, by contrast, involves difficulty with spatial tasks like drawing or assembling, not the ability to perform learned sequences per se.