Elbow Flexors
What are the 3 elbow flexors?
Biceps brachii, brachialis, brachioradialis
What are elbow extensors?
Triceps brachii & Anconeus
What are the elbow supinators?
Biceps brachii & supinator
A pt reports numbness and tingling in their first 3 digits, what nerve can be causing this?
Median nerve
What are 2 entrapment sites of the median nerve?
Upper arm, ligament of struthers, bicipital aponeurosis, pronator teres, FDS and FDP, and carpal tunnel
What are the 3 actions of the biceps brachii?
Elbow flexion, elbow supination, and shoulder flexion
What are the 3 actions of the triceps brachii long head?
Elbow extension, shoulder extension, and shoulder adduction
What are the elbow pronators?
Pronator teres & pronator quadratus
You hear somebody say, "Ouch, I just hit my funny bone". What nerve is usually responsible for this sensation?
Ulnar nerve
What are 2 entrapment sites of the ulnar nerve?
Upper arm, arcade of struthers, cubital tunnel, FCU, and guyon's canal
What is the insertion of the brachioradialis?
Styloid process of the radius
What is the origin of the anconeus?
Lateral epicondyle of the humerus
What muscle is the main supinator of the elbow?
Biceps Brachii
What are 2 muscles that are innervated by the musculocutaneous nerve?
Biceps brachii & brachialis
What arteries does the axillary artery come from and turn into?
Comes from the subclavian artery and turns into the brachial artery in the upper arm
What is the origin of the brachialis?
Distal half of anterior surface of the humerus
What is the common insertion of both the triceps brachii and the anconeus?
Olecranon process of the ulna
What is the insertion of the pronator teres?
Middle, lateral surface of the radius
What are 2 muscles innervated by the median nerve?
Pronator teres & pronator quadratus
What nerves do the median nerve and radial nerve branch into?
Medial nerve = anterior interosseous nerve
Radial nerve = posterior interosseous nerve
What are the origins for both portions of the biceps brachii?
Short head = coracoid process of scapula
Long head = supraglenoid tubercle of scapula
What are the origins for all 3 portions of the triceps brachii?
Long head = infraglenoid tubercle of the scapula
Lateral head = posterior surface of proximal half of the humerus
Medial head = posterior surface of distal half of the humerus
What is the origin of the supinator muscle?
What are 3 muscles that are innervated by the radial nerve?
Triceps brachii, anconeus, supinator, brachioradialis, and a portion of the brachialis
During a physical exam, you notice that as a patient pronates their arm their wrist drops. What nerve is responsible for this?
Radial nerve