Muscles Acting on the Arm Anterior Group Flashcards
1
Q
Pectoralis major
A
O: Sternum, costal cartilages, and clavicle
I: Humerus
A: Flexes, adducts, and medically rotates arm
N: Pectoral nerves
2
Q
Deltoid (anterior fibers)
A
O: Clavicle (scapula for lateral and posterior fibers)
I: Deltoid tuberosity of the humerus
A: Flexes, extends, abducts, and medically rotates arm
N: Axillary nerve
3
Q
Coracobrachialis
A
O: Scapula
I: Humerus
A: Flexes and adducts arm
N: Musculocutaneous
4
Q
Biceps brachii
Long head
Short head
A
O: Scapula
I: Radius
A: Weak shoulder flexion (also flexes the elbow and supinates forearm)
N: Musculocutaneous
