Origins of Upper Extremity Muscles Flashcards
Pectoralis Major Origin
- Medial half of clavicle
- Manubrium
- Body of sternum
- Cartilage of first 6-7 ribs
Pectoralis Minor Origin
Ribs 2-5
Serratus Anterior origin
Ribs 1-8
Trapezius origin
- Superior nuchal line
- External occipital protuberance
- Ligamentum Nuchae
- Spinous processes and supraspinous ligaments of C7
- All thoracic vertebrae
Rhomboid major and minor origin
- Ligamentous nuchae
- Spinous processes of C7 to T5
Levator Scapulae origin
Transverse processes of C1-C4
Sternocleidomastoid origin
- Manubrium
- Medial portion of clavicle
Latissimus Dorsi origin
- Spinous processes of 7-12 thoracic vertebrae
- Fascia from the lumbar and sacral vertebrae
- Last 3 to 4 ribs
- Inferior angle of scapula
Anterior deltoid origin
Lateral end of clavicle
Middle deltoid origin
Acromion
Posterior deltoid origin
Spine of scapula
Teres major origin
Inferior angle of scapula
Coracobrachialis origin
Coracoid process of scapula
Subscapularis origin
Subscapular fossa of scapula
Supraspinatus origin
Supraspinatus fossa of scapula
Infraspinatus origin
Infraspinatus fossa of scapula
Teres minor origin
Lateral border of scapula
Long head of biceps origin
Supraglenoid tubercle of scapula
Short head of biceps origin
Coracoid process of scapula
Brachialis origin
Distal aspect of the anterior surface of the humerus
Lateral head of triceps origin
- Posterior humerus
- Superior and lateral to the radial groove
Long Head of Triceps origin
Infraglenoid tubercle of scapula
Medial Head of Triceps origin
- Posterior humerus
- Inferior and medial to the radial groove
Brachioradialis origin
Upper two thirds of the lateral supracondylar ridge of the humerus
Aconeus origin
Posterior side of the lateral epicondyle of the humerus
