ABSTRACT
CASE PRESENTATION An 11-year-old boy presented to our neurological clinic for evaluation of jerking movements of his body. Problems were first noticed at age two-and-a-half years when he began tripping over his right foot while walking in an airport. His foot involuntarily assumed a plantar-flexed position when walking. By age four-and-a-half he had developed intermittent jerking of his arms. The jerks mainly involved the right arm, and therefore he favored his left hand for most tasks such as typing or playing piano. At age 7 he developed truncal jerks which were often so violent that they would cause him to fall backwards or collapse to his knees. The jerks were most prominent when he was sitting unsupported and disappeared when lying flat in bed. At age 14 he noticed slurred speech and underwent a lingual frenectomy, with mild improvement.
