Lesson 6: Joints of the Shoulder Girdle and Scapular Joint Actions

by Brent Brookbush DPT, PT, MS, PES, CES, CSCS, ACSM H/FS

Joints of the Shoulder Girdle:

  • The sternoclavicular joint - where the sternum meets the proximal end of the clavicle.

    • Etymology:

      • Sternum -  "breastbone," 1660s, from Greek sternon "chest, breast, breastbone" (in Homer, only of males), also "the breast as the seat of affections," related to stornynai "to spread out," from PIE *ster-no- "to stretch, extend," from root *stere-, *ster- "to spread," related to stornynai "to spread out" (see structure (n.)), on the notion of the chest as broad and flat, as opposed to the neck. Related: Sternal. (Etymology Dictionary)
      • Clavicle - Etymology: L, clavicula, little key (Medical Dictionary)

Sternoclavicular Joint Sternoclavicular Joint - By Henry Vandyke Carter - Henry Gray (1918) Anatomy of the Human Body (See "Book" section below)Bartleby.com: Gray's Anatomy, Plate 325, Public Domain, https://commons.wikimedia.org/w/index.php?curid=85419

  • The acromioclavicular joint - where the acromion of the scapula meets the distal end of the clavicle

    • Etymology:

Acromioclavicular (AC) Joint Acromioclavicular Joint (AC Joint) - By Henry Vandyke Carter - Henry Gray (1918) Anatomy of the Human Body (See "Book" section below)Bartleby.com: Gray's Anatomy, Plate 326, Public Domain, https://commons.wikimedia.org/w/index.php?curid=85420

Joint Actions of the

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