pectoral complex muscle M. flexor antibrachii lateralis superficialis Originates as a superior and inferior head. The superior head originates on the outer edge of the humerus and the inferior head originates on the lateral epicondyle of the humerus. Both bellies converge to form a tendon, which inserts on the carpus and the extensor tendon of digit I. This class was sourced from an external ontology (amphibian_anatomy). Its definitions, naming conventions and relationships may need to be checked for compatibility with uberon UBERON:3010743