Skip to Content

deltoid (muscle)


Definition: intrinsic (scapulohumeral) muscle of shoulder joint; origin, lateral third of anterior border of clavicle, lateral and posterior border of acromion process, lower border of spine of scapula; insertion, lateral side of shaft of humerus (deltoid tuberosity) a little above its middle; action, its anterior, middle, and posterior portions act independently to produce abduction, flexion, extension, and rotation of the humerus at the shoulder joint; nerve supply, axillary (fifth and sixth cervical spinal cord segments via the brachial plexus).

Synonym(s): musculus deltoideusTA

Disclaimer: This site is designed to offer information for general educational purposes only. The health information furnished on this site and the interactive responses are not intended to be professional advice and are not intended to replace personal consultation with a qualified physician, pharmacist, or other healthcare professional. You must always seek the advice of a professional for questions related to a disease, disease symptoms, and appropriate therapeutic treatments.
© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.