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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Shoulder Girdle (Scapular) |
Back (Definition) |
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Prime Mover/Agonist (PM) |
The main muscle or muscle groups responsible for a particular movement or action For example, the triceps brachii is the main muscle responsible for movement during a triceps Extension |
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Antagonist |
Moves in opposition to or opposes the prime mover/agonist (opposite joint action muscle/muscle group) During a biceps curl, the opposing muscle group—the antagonist—is the triceps. |
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Synergist |
Assists the agonist in performing its action Stabilizes and neutralizes joint rotation (prevents joint from rotating as movement is performed)
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Shoulder |
Muscles that cross the shoulder joint and have the ability to move the humerus
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Shoulder Flexors/Horizontal Flexors |
Pectoralis Major Clavicular Fibers Sternal fibers |
Anterior Deltoid Biceps Brachii (Synergist) |
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Shoulder Extensors/Horizontal Extensors |
Latissimus Dorsi Posterior Deltoid |
Triceps Brachii (Synergist) |
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Shoulder Adductors |
Pectoralis major Latissimus Dorsi |
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Shoulder Abductors |
Supraspinatus Prime mover in the first 15 degrees of abduction beyond that the medial deltoid takes over Medial Deltoid (middle fibers) |
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The Rotator Cuff – S.I.T.S. |
Supraspinatus- abduction (first 15 degrees) Infraspinatus- external rotation Teres minor- external rotation Subscapularis- internal rotation |
Reinforces the joint capsule Stabilizes humeral head into the glenoid fossa All muscles contract in unison All Muscles are responsible for Scaption |
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Shoulder Gridle: Scapular Elevation |
Trapezius (upper fibers) Levator scapula |
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Shoulder Gridle: Scapular Depression |
Trapezius (lower fibers) Serratus anterior Pectoralis Minor |
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Shoulder Gridle: Scapular Retraction |
Rhomboids....................................Trapezius (middle fibers)......... |
Latissimus Dorsi |
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Shoulder Gridle: Scapular Protraction |
Serratus Anterior Pectoralis minor |
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Scapulohumeral Rhythm |
The shoulder joint (Humerus and Scapula) and the shoulder girdle (scapula, clavicle, sternum) WORK TOGETHER when we move. |
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Scapulohumeral Rhythm |
• Allows for greater ROM of the shoulder, the shoulder girdle moves in response to humeral movement. • 2 ̊:1 ̊ is the approximate ratio for humeral:scapular movement. • As the humerus (shoulder) goes into flexion, the scapular (shoulder girdle) upwardly rotates |
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