Muscles Superior to the Shoulder Joint

Muscles Superior to the Shoulder Joint - horizontal...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Muscles Superior to the Shoulder Joint MUSCLE FROM TO ACTION Deltoid (3 heads) anterior - anterior outer 1/3 of clavicle middle - acromion process and outer end of clavicle posterior - lower margin of spine of scapula lateral aspect of humerus near midpoint anterior - all forward movements of arm including flexion and horizontal flexion, also inward rotation middle - Multipenniform structure gives it great strength without bulk, powerful abductor, poor angle of pull (about 15-25 ° ) for movement but is great for stabilization. Also acts in
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: horizontal extension to maintain arm position. posterior - Extension and lateral rotation. Forceful adduction of shoulder from an overhead position Supraspinatus medial 2/3 of supra spinatus fossa above scapular spine top of greater tuberosity of humerus Acts in shoulder abduction, as well as flexion and horizontal extension to stabilize the shoulder. It is also a part of the "rotator cuff" muscles so it prevents downward dislocation....
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern