Apraxia, or dyspraxia, is the loss of ability to make accurate skilled movements. The cause is a disorder of the cerebral cortex of the BRAIN: the patient is unable to coordinate his or her movements. Apraxia diﬀers from clumsiness resulting from muscular weakness, loss of sensation or disease in the cerebellum (see BRAIN).
The condition is usually a consequence of disease in the brain’s parietal lobes, though frontal-lobe disease may cause it. A person with gait apraxia has normal power in the legs and no abnormal signs suggesting cerebellar disease, but cannot perform the normal act of walking because of malfunction in the cerebrum.