We will present the study of the surgical treatment (the functional reconstruction used by multiple muscle transfers) of birth palsy. Eight shoulders with birth palsy were treated from 1988 to 1993. There were three boys and five girls. Five were right side and three were left. Two were latissimus dorsi (LD) transfers only, three were trapezius (Tr. ) transfers only and Three were both latissimus dorsi and trapezius (LD+Tr.) transfers. The average age at surgery was 9 years and 11months and the postoperative period was 1 year and 9 months. The results of the LD transfers for posterior dislocations or internal rotational contractures were good. Two cases on whom only Tr. transfers had been performed had fair results because of weak LD muscle strength. Cases with a deltoid MMT 3 on whom LD+Tr. transfers had been performed had good results. A case with deltoid MMT 1, however, recovered with under 90 degrees in shoulder abduction. Fortunately, this case had a stable shoulder running without any need for a support.
