motor apraxia

n. Loss of the ability to produce purposeful, skilled movements as the result of brain pathology. This impairment in the production of learned (or skilled) movements is not due to weakness, paralysis, lack of coordination, or sensory loss. Three subtypes of motor apraxia are described: (1) limb kinetic apraxia, (2) ideokinetic or ideomotor apraxia, and (3) ideational apraxia. Limb kinetic apraxia is a loss of the kinetic components of engrams resulting in coarse or unrefined movements. Ideokinetic or ideomotor apraxia is a loss of the voluntary ability to perform learned movements. Ideational apraxia is an impairment of ideational (conceptual) knowledge resulting in loss of the conceptual linkage between tools and their respective actions as well as the ability to sequence correctly produced movements. Ideomotor apraxia can be divided according to the body segment where it is observed: face apraxia (ocular and oral apraxia), limb apraxia (upper limb apraxia and gait apraxia), and axial apraxia (body trunk apraxia). Other subtypes of motor apraxia have also been described, such as callosal apraxia, conceptual apraxia, and sympathetic apraxia. – AA
▶ See also APRAXIA