Appendicular Muscles Flashcards
The trapezius’ five attachment sites include what?
Occipital bone, vertebrae, clavicle, scapular spine and acromion of scapula
The upper fibers of the trapezius do what to the scapula?
Elevate and rotate scapula
The lower fibers of the trapezius do what to the scapula?
Depress and rotate scapula
The middle fibers of the trapezius do what to the scapula?
Retract scapula
What are the two attachments for the serratus anterior?
Scapula and ribs
What is the two functions of the serratus anterior?
Protracts and rotates scapula and holds scapula against the body wall
What four muscles move the pectoral girdle?
Trapezius, serratus anterior, and the rhomboid major and minor
What four muscles move the shoulder joint?
Deltoid, pectoralis major, latissimus dorsi, and teres major
What are the four attachments for the pectoralis major?
Sternum, clavicle, ribs, and humerus
What muscle flexes, adducts, and medially rotates the arm?
Pectoralis major
What two muscles extend, adduct, and medially rotate the arm?
Latissimus dorsi and teres major
What are the attachments for the latissimus dorsi?
Lower back and humerus
What are the attachments for the teres major?
Scapula and humerus
What are the four attachments for the deltoid?
Humerus, clavicle, and scapular spine and acromion of scapula
The anterior fibers of the deltoid do what?
Flex and rotate the arm
The middle fibers of the deltoid do what?
Abduct the arm
The posterior fibers of the deltoid do what?
Extend and rotate the arm
What are the two attachments for the supraspinatus muscle?
Supraspinous fossa of the scapula and greater tubercle of humerus
What is the action of the supraspinatus muscle?
Abduct arm for the first 15 degrees
What muscle medially rotates the arm and is attached to the subscapular fossa of the scapula and lesser tubercle of the humerus?
Subscapularis
What are the two muscles that adduct and laterally rotate the arm that have attachments on the infraspinous fossa of scapula and greater tubercle of the humerus?
Teres minor and infraspinatus
The anterior compartment of the arm all have what action in common?
Flexion
What are the four muscles in the rotator cuff? Which one is typically injured?
Supraspinatus, infraspinatus, teres minor, and subscapularis with supraspinatus being typically injured
What is the one muscle of the upper arm in the posterior compartment?
Triceps brachii
What two muscles are deep to the biceps brachii?
Coracobrachialis and brachialis
What muscle flexes the forearm and has the humerus and ulna as attachment sites?
Brachialis