Clinical Anatomy 2 - Lab 3

What is the origin of the brachialis muscle?

(a)  

• Anterior lower half of humerus
• Posterior lower half of humerus
• Medial epicondyle of the radius
• Coronoid process of ulna

Where does the brachialis muscle insert?

(a)  

• Coronoid process of ulna & tuberosity of ulna
• Greater tubercle of humerus
• Lateral epicondyle of humerus
• Head of the radius & tuberosity of ulna

What is the action of the brachialis muscle?

The nerve that supplies the brachialis muscle is the (a)   nerve.

• Musculocutaneous
• Radial
• Median
• Ulnar

The brachialis muscle is deep to which muscle?

Which anatomical landmark is identified by sliding off the acromion inferiorly and laterally approximately one inch?

• Greater tubercle

• Intertubercular groove

• Lesser tubercle

• Coracoid process

Place your thumb on the greater tubercle. As you begin to rotate the arm laterally, the greater tubercle will move out from under your thumb and be replaced by the slender ditch of the (a)   .

• Intertubercular groove
• Deltoid tuberosity
• Radial groove
• Spiral groove

As you continue to laterally rotate the arm, your thumb will rise out of the intertubercle groove onto the (a)   .

• Greater tubercle

• Acromion process

• Lesser tubercle
• Coracoid process

What is the origin of the coracobrachialis muscle?

The insertion of the coracobrachialis muscle is the (a)   .

• Middle third of medial surface of humerus
• Medial epicondyle of humerus
• Lateral epicondyle of humerus
• Lower third of later surface of humerus