Third 3 Muscles Flashcards
Lateral 1/3 of the clavicle (anterior)
Deltoid Origin
Acromion of the scapula (middle)
Deltoid Origin
Lower lip of crest of the spine of the scapula (posterior)
Deltoid Origin
Deltoid tuberosity of the humerus
Deltoid Insertion
Abduction of humerus (middle)
Deltoid Action
Flexion, internal rotation, and horizontal adduction of humerus (anterior)
Deltoid Action
Hyperextension, external rotation, and horizontal abduction of the humerus (posterior)
Deltoid Action
Axillary Nerve, C5, C6
Deltoid Innervation
Medial 1/2 of the front of the clavicle
Pectoralis Major Origin
Anterior surface of the sternum, upper 6 costal cartilages, and aponeurosis of the external oblique muscle
Pectoralis Major Origin
Lateral lip of the bicipital groove of the humerus
Pectoralis Major Insertion
Crest of the greater tubercle of the humerus
Pectoralis Major Insertion
Horizontal adduction of the humerus
Pectoralis Major Action
Internal rotation of the humerus
Pectoralis Major Action
Flexion of humerus
Pectoralis Major Action
Medial and Lateral Pectoral Nerves, C5, C6, C7, C8, T1
Pectoralis Major Innervation
Dorsal Surface of the scapula near its inferior angle
Teres Major Origin
Medial lip of the bicipital groove of the humerus
Teres Major Insertion
Crest of the lesser tubercle of humerus
Teres Major Insertion
Internal rotation of the humerus
Teres Major Action
Extension and hyperextension of humerus;
Teres Major Action
Adduction
Teres Major Action
Lower Subscapular Nerve, C5, C6
Teres Major Innervation
