Quiz #2 Muscle, Origin, Insertion, Action (no pics)

Coracobrachialis, Origin?

Coracoid process of scapula

Coracobrachialis, insertion?

Medial surface of humerus

Coracobrachialis, action?

Flexes, adducts upper arm; rotates upper arm medially

Deltoid, origin?

Acromion process and spine of scapula, clavicle

Deltoid, insertion?

Deltoid tuberosity of humerus

Deltoid, action?

Abducts, flexes, extends upper arm

Infraspinatus, origin?

Infraspinatus fossa

Infraspinatus, insertion?

Greater tubercle of humerus

Infraspinatus, action?

Extends upper arm, rotates upper arm laterally

Latissimus dorsi, origin?

Spinous processes of lower 6 Thoracic, all Lumbar and Sacral vertebrae, iliac crest, ribs, shoulder

Latissimus dorsi, insertion?

Intertubercular sulcus of humerus

Latissimus dorsi, action?

adducts upper arm; rotates arm medially

Levator scapulae, origin?

Transverse processes of C1-C4 (cervical)

Levator scapulae, insertion?

Superior medial border of scapula

Levator scapulae, action?

Elevates scapula

Pectoralis major, origin?

Clavicle, sternum, and ribs 2-6

Pectoralis major, insertion?

Intertubercular sulcus of humerus

Pectoralis major, action?

Flexes shoulder, adducts upper arm; rotates upper arm medially

Pectoralis minor, origin?

Sternal end of ribs 3-5

Pectoralis minor, insertion?

Coracoid process of scapula

Pectoralis minor, action?

Depresses and protracts scapula; elevates ribs during forceful breathing

Rhomboideus (group), origin?

Spinous processes C7 (cervical vertebrae), T1-T5 (thoracic vertebrae)

Rhomboideus (group), insertion?

Medial border of scapula

Rhomboideus (group), action?

Retracts and elevates scapula

Serratus anterior, origin?

Outer surface of first 8 or 9 ribs

Serratus anterior, insertion?

Ventral surface of scapula

Serratus anterior, action?

Protracts and rotates scapula

Supraspinatus, origin?

Supraspinous fossa

Supraspinatus, insertion?

Greater tubercle of humerus

Supraspinatus, action?

Abducts upper arm

Subscapularis, origin?

Subscapular fossa

Subscapularis, insertion?

Lesser tubercle of humerus

Subscapularis, action?

Extends upper arm, rotates upper arm medially

Teres major, origin?

Lateral and medial borders of scapula

Teres major, insertion?

Intertubercular sulcus and lesser tubercle of humerus

Teres major, action?

Extends shoulder; adducts upper arm; rotates upper arm medially

Teres minor, origin?

Lateral and medial borders of the scapula

Teres minor, insertion?

Greater tubercle of humerus

Teres minor, action?

Rotates upper arm laterally

Trapezius, origin?

Occipital bone, spinous process of Cervical and Thoracic vertebrae

Trapezius, insertion?

Spine, acromion process of scapula; acromial end of clavicle

Trapezius, action?

Elevates, depresses, retracts, and rotates scapula