Source:http://linkedlifedata.com/resource/umls/id/C0224362
NCI: A triangular muscle in the back, connected to the vertebral column, arm, and shoulder. Its action involves adduction, medial rotation, and extension of the arm. (NCI),NCI: A triangular muscle in the back, connected to the vertebral column, arm, and shoulder. Its action involves adduction, medial rotation, and extension of the arm.