Freezing of shoulder flexion impeding boule throwing: a form of task-specific focal dystonia in petanque players.
During a period of intensive practice, 2 petanque players developed freezing of shoulder flexion impeding boule throwing. This movement disorder was consistent with the diagnosis of task-specific focal dystonia. Polymyography showed that freezing was associated with bursts of low amplitude. In the absence of motor or sensory deficits, a motor apraxia could be considered.
D020821:Dystonic Disorders / Q000175:diagnosis / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012720:Severity of Illness Index; D012782:Shoulder / Q000503:physiopathology*; D013177:Sports; D014743:Videotape Recording