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Muscles that move the arm
- Coracobrachialis
- Deltoid
- Supraspinatus
- Infraspinatus
- Subscapularis
- Teres Major
- Teres minor
- Triceps brachii (long head)
- Latissimus dorsi
- Pectoralis major
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Origin & Insertion
Coracobrachialis
- Origin: coracoid process
- Insertion: medial margin of shaft of humerus
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Origin & Insertion
Deltoid
- Origin: clavicle and scapula
- Insertion: deltoid tuberosity of humerus
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Origin & Insertion
Supraspinatus
- Origin: Supraspinous fossa of scapula
- Insertion: greater tubercle of humerus
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Origin & Insertion
Infraspinatus
- Origin: infraspinous fossa of scapula
- Insertion: greater tubercle of humerus
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Origin & Insertion
Subscapularis
- Origin: subscapular fossa of scapula
- Insertion: lesser tubercles of humerus
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Origin & Insertion
Teres major
- Origin: inferior angle of scapula
- Insertion: medial lip of intertubercular sulcus
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Origin & Insertion
Teres minor
- Origin: lateral border of scapula
- Insertion" greater tubercle of humerus
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Origin & Insertion
Triceps brachii (long head)
- Origin: infraglenoid tubercle
- Insertion: olecranon of ulna
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Origin & Insertion
Biceps brachii
- Origin: short head from coracoid process; long head from supraglenoid tubercle (both on scapula)
- Insertion: radial tuberosity
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Origin & Insertion
Latissimus dorsi
- Origin: spinous processes of inferior thoracic and all lumbar vertebrae. ribs 8-12, thoracolumbar fascia
- Insertion: floor of intertubercular sulcus of the humerus
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Origin & Insertion
Pectoralis major
- Cartilages of ribs 2-6, body of sternum and inferior, medial portion of clavicle
- Insertion: crest of greater tubercle and lateral lip of intertubercular sulcus of humerus
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- Coracobrachialis
- Action: adduction and flexion at shoulder
Innervation- nerve c5-c7
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- Deltoid
- Action:
- Whole muscle: abduction of shoulder
- Anterior: flexion and medial rotation of humerus
- Posterior: extension and lateral rotation of humerus
Innervates axillary nerve (c5-c6)
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- Supraspinatus
- Action: abduction at shoulder
Innervation: suprascapular nerve C5
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Infraspinatus
Action: lateral rotation at shoulder
Innervation: suprascapular nerve (c5
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Subscapularis:
Action: medial rotation at shoulder
Innervation: subscapular nerve (c5
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- Teres Major
- Action: extension and medial rotation at shoulder
Innervation: lower subscapular nerve (c5-c6)
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- Teres minor
- ACtion- lateral rotation and adduction at shoulder
Innervation: axillary nerve C5
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- Triceps brachii
- Action: extension at elbow
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- Biceps brachii
- Action: flexion at elbow
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- Latissimus dorsi
- Action: extension, adduction, and medial rotation at shoulder
Innervation: thoracodorsal nerve
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- Pectoralis major
- Action: flexion, adduction, and medial rotation at shoulder
Innervation: pectoral nerves
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