Ligaments,+Tendons+and+Muscles

=__Shoulder Ligaments & Tendons, Muscle ♥__=

Shoulder Ligaments
Ligaments are soft tissue structures that connect bones to bones. 3 ligaments supports the acromio-clavicular joint; the cocrocoacromial, corococlavicular, and acroclavicular ligaments. 4 ligaments make up the joint capsule that connects the humerus to glenoid; superior, middle, inferior and prosterior glenohumeral ligaments. Front and back inferior glenohumeral ligament act like a hammack to support the humerus in joints. The joint capsule is a water tight bag that surrounds the joint and prevents it from dislocating. Ligaments are only tight at the extremes of movement. This allows the large range of movement seen in the shoulder.

Website for shoulder ligaments http://www.innerbody.com/image/skel21.html



.

= = ← This is a diagram view of the shoulder joint from the side with the humeral head removed. It shows how the ligaments and tendons surround the joint.

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =

Sholuder Tendons and Muscles
Many muscles are attached to different parts of the shoulder, and they are used to move the arm about in space. The deltoid muscle is attached to the shoulder blade along the spine of the scapula (the acromion) and also attaches to part of the clavicle. This muscle crosses the shoulder joint and attaches to the humerus halfway down the bone. The deltoid is the strongest shoulder muscle. It lifts your arm up and away from the side of your body. Underneath the deltoid muscle is rotator cuff of muscles.The rotator cuff is group of 4 muscles that from a strong cuff around the shoulder joint and are the muslces that help to control the rotations position of the arm.

1) The subscapularis Muscle
 * attached to the deep surface of the scapula and then travels in front of the humeral head.

- This muscle is used to internally rotate the arm and to bring the arm down to the side of the body - The subscapularis Muscle roles the very important positon that in preventing the shoulder from slipping out of the front of the joint.

2) Posterior Rotator Cuff
 * It includes the rest of the 3 muscles in rotator cuff that are The Supraspinatus Muscle, THe Infraspinatus Muscle, and The Teres Minor Muslce.

- They externally rotate the arm and also help to bring the arm down to the side of the body. - Supraspinatus Muscle is the most commonly injured part of the rotator cuff.

Website for Shoulder Muscle and Tendons http://www.innerbody.com/image_musc10/skel15.html

[Pictures of Shoulder Tendones and Muscle]



[Basic Pictures about Rotator Cuff]

Picture courtesy for: 1. upperlimbcentre.com 2. http://www.mydr.com.au/

Wiki by: Heather L. & Ji Yoon K. Faith lutheran January 8, 2008