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Medical Definition of Obstetrical palsy
1. A brachial plexus lesion sustained by the infant during the birthing process; three types are recognised: 1) upper plexus type, affects the shoulder and upper arm (Erb palsy); 2) total plexus type, involves the whole arm; 3) lower plexus type, involves the forearm and hand (Klumpke palsy). Synonym: obstetrical paralysis. (05 Mar 2000)