Apraxia is a neurological condition in which a person has trouble making specific movements. There is no damage with the muscles themselves - the problem is in the brain. In extreme cases of apraxia the sufferer cannot make some movements at all.
There are different varieties of apraxia. In some cases the sufferer cannot move their arms or legs. Orofacial apraxia results in not being able to move part of your face. A common example is not being able to wink. Apraxia of speech occurs when an individual does not have the ability to speak because they cannot move their mouth or tongue to form words. Apraxia of speech differs from aphasia because the sufferer can comprehend the speech. They cannot move their mouth and tongue to physically form the words. Apraxia of speech can be acquired in adulthood or can occur in young children as a developmental issue.