Deltoid muscle

The deltoid muscle (also known as deltoideus muscle) is the largest of the shoulder muscles. The muscle is composed of three heads (clavicular, acromial and spinous), although electromyography suggests that there are at least seven control regions that could act independently 1.


Anatomy: Upper limb

Anatomy: Upper limb

Article information

rID: 23169
Section: Anatomy
Synonyms or Alternate Spellings:
  • Deltoideus muscles
  • Deltoids (muscle)
  • Deltoid muscles
  • Delts (muscle)
  • Deltoideus muscle

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Figure 1: anterior arm anatomy (Gray's illustration)
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.