Apraxia

Apraxia is a neurological disorder characterized by loss of the ability to execute or carry out learned (familiar) movements, despite having the desire and the physical ability to perform the movements. There are several types of apraxia including limb-kinetic (inability to make fine, precise movements with a limb), ideomotor (inability to carry out a motor command), ideational (inability to create a plan for or idea of a specific movement), buccofacial or facial-oral (inability to carry out facial movements on command, i.e., lick lips, whistle, cough, or wink) - which is perhaps the most common form, verbal (difficulty coordinating mouth and speech movements), constructional (inability to draw or construct simple configurations), and oculomotor (difficulty moving the eyes). Apraxia may be accompanied by a language disorder[?] called aphasia.

Generally, treatment for individuals with apraxia includes physical and or occupational therapy. If apraxia is a symptom of another disorder, the underlying disorder should be treated. The prognosis for individuals with apraxia varies, With therapy, some patients improve significantly, while others may show very little improvement.

(Based on http://www.ninds.nih.gov/health_and_medical/disorders/apraxia.htm)