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Rotator Cuff Mechanics

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Rotator Cuff Mechanics
When explaining how muscle groups function as a whole and as individual muscles, it’s important to have the client explain her level of familiarity with the subject to ensure that any misnomers have been dispelled. It’s important to identify the true cause of the shoulder problem too, just because she was told that the problem was specific to the “rotator cuff” doesn’t mean that information accurate represents her condition.
Before going into depth about muscles of the rotator cuff, the anatomy of the shoulder’s skeletal structure should be explained. Unlike other ball and socket joints of the body, the glenohumeral (G/H) joint’s ball and socket are disproportional. The glenoid fossa of the scapula is extremely shallow …show more content…
Before making drastic changes to a normal routine, it’s a good idea to have a mental inventory of how your body feels. This allows problems than can arise to be quickly identified. One common of many problems people can encounter while training for fitness or sports is medial epicondylitis (Golfer's elbow). Stress at the muscle-tendon junction during repetitive motion is the primary cause of inner elbow pain. Repeatedly flexing the elbow at the humeroradial and the humeroulnar joints during curls will cause damage without proper form.
When explaining the injury to clients, it’s important to discuss muscular and skeletal anatomy relevant to the injury. The medial epicondyle of the humerus is where many of the muscles associated with this condition attach. This large bony prominence is located on the medial side and distal end of the humorous. To verify its location, simply shake the hand of the client to locate the olecranon process. Just medial to it is the medial epicondyle; it’s more prominent that the lateral epicondyle located on the lateral side. Two muscle attached to this point that is most likely to be problematic …show more content…
Insertion: Base of the 2nd and 3rd metacarpals
Action: Flexion of the wrist
Innervation: Median nerve
Other muscles that are less likely to be causative of Golfer’s Elbow are:
• Palmaris longus
Origin: The medial epicondyle of the humerus
Insertion: The palmar aponeurosis, the transverse carpal ligament
Action: Flexes the hand and wrist
Innervation: Median nerve
• Flexor digitorum superficialis:
Origin: Medial head of the humerus, proximal radial head shaft, coronoid process of the ulna
Insertion: Middle phalanges of digits 2-5
Action: Flexes the digits at the PIP and MP joints, flexes the wrist Innervation: Median Nerve
• Flexor carpi ulnaris:
Origin: Humeral head: medial epicondyle via the common flexor tendon
Ulnar head: Medial aspect of the olecranon, the proximal three-fifths of the dorsal ulnar shaft
Insertion: Pisiform, hamate bones, 5th metacarpal
Action: Flexion and adduction of the wrist, aids with flexion of the forearm Innervation: Ulnar

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