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Anatomy and kinesology
Shoulder girdle-muscles, movements, insertion, origin, and nerve intervation
Terms in this set (89)
Pectoralis Minor Action
Protraction (abduction); downward rotation of scapula
Pectoralis Minor nerve
Medial and Lateral Pectoral
Pectoralis Minor Origin and Insertion
O- Ribs 3-5; I-Coracoid process of the scapula
Serratus Anterior Nerve
Serratus Anterior Action
Protraction (abduction) of the scapula; prevents scapular winging
Serratus Anterior Origin and Insertion
O-Anterior surface of the upper 9 ribs; I-Anterior side of the medial border of the scapula
Upper Trapezius Origin and Insertion
O-Occipital bone, Ligamentum nuchae, C1-C7; I-Lateral 1/3 of clavicle and acromion process
Upper Trapezius Nerve
Upper Trapezius Action
Elevates; upwardly rotates the scapula
Downward rotation; adduction of scapula
Rhomboids Origin and Insertion
O-C7-T5; I- Medial Border of scapula
Levator Scapulae Action
Elevates the scapula
Levator Scapulae Origin and Insertion
O-Transverse processes of the upper 4 cervical vertebrae; I-Superior Angle of the scapula
Levator Scapulae Nerve
Middle Trapezius Nerve
Middle Trapezius Origin and Insertion
O-C7-T5; I-Scapular spine
Middle Trapezius Action
Scapular Retraction (adduction)
Lower Trapezius Nerve
Lower Trapezius Origin and Insertion
O-T6-T12; I- Scapular Spine
Lower Trapezius Action
Upward rotation; Depression of the scapula
Deltoid Anterior Origin and Action
O-Clavicle; A-Flexion; Internal Rotation
Deltoid Middle Origin and Action
O-Acromion Process of scapula; A-Abduction
Deltoid Posterior Origin and Action
O-Spine of scapula; A-Extension; External Rotation
Deltoid Anterior, Middle, Posterior Insertion and nerve
I-Deltoid Tuberosity of humerus; N-Axillary
Humeral abduction; External rotation
Supraspinatus Origin and Insertion
O-Supraspinatus Fossa of Scapula; I-Greater Tuberosity of Humerus
Pectoralis Major Action
Adduction; horizontal adduction; assist in shoulder flexion
Pectoralis Major Nerve
Medial and lateral pectoral
Pectoralis Major Origin and Insertion
O-Clavicular head-medial 2/3 of the clavicle; Sternal head- sternum and upper 6 ribs; I-Lateral aspect of the humerus
Coracobrachialis Origin and Insertion
O-Coracoid process of the scapula; I-Medial and anterior aspect of the humerus
Flexor of shoulder; weak adductor
Latissimus Dorsi Nerve
Latissimus Dorsi Action
Extends; adducts; internally rotates shoulder
Latissimus Dorsi Origin and Insertion
O-Spines of lower 6 thoracic and all lumbar; I-Intertubercular groove of humerus
Teres Major Origin and Insertion
O-Inferior angle of the scapula; I-Lesser tuberosity of humerus
Teres Major Nerve
Teres Major Action
Internal rotation; adduction, and extension
Teres Minor Action
External rotation; horizontal abduction
Teres Minor Origin and Insertion
O-Lateral border of the scapula; I-Greater Tuberosity of humerus
Teres Minor Nerve
Infraspinatus Origin and Insertion
O-Infraspinous fossa of scapula; I-Greater tuberosity of humerus
External rotation; Horizonal abduction
Subscapularis Origin and Insertion
O-Subscapular fossa; I-Lesser tuberosity of the humerus
List the 4 muscles that make up the Rotator Cuff.
Supraspinatus, infraspinatus, teres minor, and subscapularis
Winging of Scapula is caused by injuring which muscle?
The tendinous band that keeps the head of the humerus rotating against the glenoid fossa during joint motion?
What two muscles elevate the scapula?
Upper trapezius and levator scapulae
What Muscle Depresses the scapula?
What two muscles upwardly rotate the scapula?
Upper and Lower Trapezius
What two muscles downwardly rotate the scapula?
Rhomboids and Pectoralis Minor
What two muscles protract (abduct) the scapula?
Serratus Anterior and Pectoralis Minor
What two muscles retract (adduct) the scapula?
Middle Trapezius and Rhomboids
What two muscles abduct the humerus?
Middle deltoid and Supraspinatus
What four muscles adduct the humerus?
Coracobrachialis, Latissimus Dorsi, Teres Major, and Pectoralis Major
what two muscles horizontally abduct the humerus?
Infraspinatus and Teres Minor
What muscle horizontally adducts the humerus?
What 3 muscles flex the humerus?
Anterior Deltoid, pectoralis major,and coracobrachialis
What 4 muscles externally rotate the humerus?
Posterior deltoid, supraspinatus, infraspinatous, and teres minor
What 3 muscles extend the humerus?
Posterior deltoid, latissimus dorsi, teres major
What 4 muscles internally rotate the humerus?
Anterior deltoid, latissimus dorsi, teres major, and subscapularis
Patient has drooping and down turning of shoulder at rest. Which nerve has been damaged?
Patient has weakness of the rotator cuff muscles resulting in pain from impingement and an inability to begin shoulder abduction. Which nerve is damaged?
Any attempt by patient to retract the scapula will be accompanied by a marked upward rotation of the shoulder because the rhomboids can't oppose the upward rotation of the scapula when the traps contract. Which nerve has been damaged?
Patient complains of weakness of most shoulder functions and has inability to abduct the glenohumeral joint, inability to laterally rotate the humerus, and weakened flexion and extension. Which nerve has been damaged?
What 5 parts of body are includes in the shoulder complex?
Scapula, humerus, clavicle, ribs, and sternum
What is the only joint that articulates with the trunk?
This joint provides stability for glenohumeral movements and shock absorption when falling on an outstretched hand?
This ligament assists in restricting upward displacement and downward rotation of the medial clavicle.
This joint is injured by falling on an outstretched arm or the tip of the shoulder.
During childhood which bone is more easily fractured since the bone is weaker?
Patient can't raise their arm over their head. What muscle has suffered paralysis?
What joint has 3 degrees of freedom and has the greatest range of motion of any joint in the body?
Which ligament is the most important structure for maintaining glenohumeral integrity and stability?
What are fibrous pockets that decrease the irritating effects of friction within the shoulder joint?
What humeral mover muscle can act as its own agonist and antagonist?
What muscle is important for women with a lot of breast tissue to stretch, so the weight doesn't cause rounded shoulders?
What muscle is often injured by picking up too much weight in an unbalanced position?
This muscle is often called latissimus dorsi's little helper because it performs the same action?
What is the most commonly injured muscle of the rotator cuff?
These two muscles are often injured pulling a wheeled suitcase and can cause problems putting your arm in a sleeve or grabbing seatbelt.
infraspinatus and teres minor
This is caused by weakness of rotator cuff tendons and/or trauma. The head of the humerus subluxes or seperates. Usually when the humerus is in the position of abduction or flexion.
This is a progressive, painful condition that starts with limited ROM and progresses to no movement. Pain can radiate down the arm to the hand in a pulsing fashion.
Adhesive capsulitis or frozen shoulder
This is caused when the humerus is in 90 degress of abduction and the head of the humerus in the glenoid fossa impinges the rotator cuff tendons causing inflammation. Patient will usually have intense pain especially with abduction and flexion.
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