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

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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

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3
Q

Coracobrachialis

A

O: Scapula
I: Humerus
A: Flexes and adducts arm
N: Musculocutaneous

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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

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