cerebral palsy

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A disorder usually caused by brain damage occurring at or before birth and marked by muscular impairment. Often accompanied by poor coordination, it sometimes involves speech and learning difficulties.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun neurology, pathology A group of non-progressive, non-contagious conditions, caused by brain damage before birth or during infancy, characterized by impairment of muscular coordination.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a loss or deficiency of motor control with involuntary spasms caused by permanent brain damage present at birth