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Shoulder Joint

Muscles of shoulder

QuestionAnswer
Middle Deltoid- Origin Lateral side of acromion process
Middle Deltoid- Insertion Deltoid tuberosity
Middle Deltoid- Nerve Innervation Axillary nerve (C5, 6)
Middle Deltoid- Action Shoulder abduction
Anterior Deltoid -Origin Lateral 1/3 of clavicle
Anterior Deltoid -Insertion Deltoid Tuberosity
Anterior Deltoid - Nerve Innervation Axillary nerve (C5,6)
Anterior Deltoid - Action *Abduction *Flexion *Internal rotation
Posterior Deltoid- Origin Spine of scapula
Posterior Deltoid- Insertion Deltoid tuberosity
Posterior Deltoid- Nerve Innervation Axillary nerve (C5,6)
Posterior Deltoid- Action *Shoulder abduction
Pectoralis Major- Clavicular Head- Origin Anterior surface of the medial ½ of clavicle
Pectoralis Major- Clavicular Head- Insertion Lateral lip of bicipital groove of humerus
Pectoralis Major-Clavicular Head-Nerve Innervation Medial & lateral pectoral nerve (C5,C6,C7,C8,T1
Pectoralis Major-Clavicular Head- Action Shoulder flexion-1st 60
Pectoralis Major- Sternal Head- Origin Sternum, coastal cartilage of 1st 6 ribs
Pectoralis Major- Sternal Head- Insertion Lateral lip of bicipital groove of humerus
Pectoralis Major- Sternal Head- Nerve Innervation Medial & lateral pectoral nerve (C5, C6, C7, C8, T1
Pectoralis Major- Sternal Head- Action *Shoulder extension-1st 60° (from 180°-120°)
Latissimus Dorsi- Origin Spinous processes of T7 to L5, 9th to 12th ribs, & iliac crest
Latissimus Dorsi- Insertion Floor of the bicipital groove of humerus
Latissimus Dorsi- Nerve Innervation Thoracodorsal nerve (C6, C7, C8)
Latissimus Dorsi- Action Shoulder extension * Adduction *Medial rotation *Hyper extension
Teres Major- Origin Axillary border of scapula near inferior angle
Teres Major- Insertion Crest below lesser tubercle; inferior to latissimus dorsi
Teres Major-Nerve Innervation Lower sub scapular nerve (C5, C6, C7)
Teres Major- Action Shoulder Extension *Adduction *Medial rotation
Supraspinatus- Origin Supraspinous fossa of scapula
Supraspinatus- Insertion Greater tubercle of humerus
Supraspinatus- Nerve Innervation Suprascapular nerve (C5, 6)
Supraspinatus- Action *Shoulder abduction
Infraspinatus- Origin Infraspinous fossa of scapula
Infraspinatus- Insertion Greater tubercle of humerus
Infraspinatus- Nerve Innervation Suprascapular nerve (C5, 6)
Infraspinatus- Action *Shoulder lateral rotation *Horizontal abduction
Teres Minor- Origin Axillary border of scapula
Teres Minor-Insertion Greater tubercle of humerus
Teres Minor- Nerve Innervation Axillary nerve (C5,6)
Teres Minor- Action *Shoulder lateral rotation *Horizontal abduction
Subscapularis- Origin Subscapular fossa of scapula
Subscapularis- Insertion Lesser tubercle of humerus
Subscapularis- Nerve Innervation Upper & Lower Subscapular Nerves (C5,6)
Subscapularis- Action Shoulder Medial rotation
Coracobrachialis- Origin Coracoid process of scapula
Coracobrachialis- Insertion Medial surface of humerus near midpoint
Coracobrachialis- Nerve Innervation Musculocutaneous nerve (C6, C7)
Coracobrachialis- Action Stabilizes shoulder joint
Biceps Brachii-Origin Long Head: supraglenoid tubercle of scapula Short Head: coracoid process of scapula
Biceps Brachii- Insertion Radial tuberosity & bicipital aponeurosis of radius
Biceps Brachii- Nerve Innervation Musculocutaneous nerve
Biceps Brachii- Action Elbow flexion *Forearm supination
Triceps Brachii- Origin Long head: infra glenoid tubercle of scapula Lateral Head: inferior to greater tubercle on posterior humerus Medial Head: posterior surface of humerus
Triceps Brachii- Insertion Posterior surface of olecranon process of ulna
Triceps Brachii- Nerve Innervation Radial nerve (C7, C8)
Triceps Brachii- Action *Elbow extension
Created by: jello-cup
 

 



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