Elbow - muscles (supination and pronation)

Question 1

Name the 2 elbow pronator muscles and identify where they are located on the human body (if unable check on Complete Anatomy)

Answer 1

Pronator quadratus
Pronator teres

Question 2

What is the Origin, Insertion and Innervation of the pronator quadratus muscle?

Answer 2

o Origin – Anterior aspect of distal ¼ of ulna
o Insertion – Anterior aspect of distal ¼ of radius
o Innervation – Anterior antebrachial interosseous nerve (C7-C8)

Question 3

What is the Origin, Insertion and Innervation of the pronator teres muscle?

Answer 3

o Origin – Medial supracondylar ridge of humerus, via the common flexor tendon, and medial aspect of coronoid process of ulna
o Insertion – Middle 1/3 of anterolateral aspect of radius
o Innervation – Median nerve (C6-C7)

Question 4

Name the 3 elbow supinator muscles and identify where they are located on the human body (if unable check on Complete Anatomy)

Answer 4

Long head of biceps brachii
Short head of biceps brachii
Supinator

Question 5

What is the Origin, Insertion and Innervation of the long head of biceps brachii muscle?

Answer 5

 Origin – Supraglenoid tubercle of scapula
 Insertion – Radial tuberosity and antebrachial fascia
 Innervation – Musculocutaneous nerve (C5-C6)

Question 6

What is the Origin, Insertion and Innervation of the short head of biceps brachii muscle?

Answer 6

 Origin – Apex of coracoid process of scapula
 Insertion – Radial tuberosity and antebrachial fascia
 Innervation – Musculocutaneous nerve (C5-C6)

Question 7

What is the Origin, Insertion and Innervation of the supinator muscle?

Answer 7

o Origin – Lateral epicondyle of humerus, supinator crest and supinator fossa of ulna
o Insertion – Anterior, lateral, and posterior aspects of proximal 1/3 of radius
o Innervation – Posterior antebrachial interosseous nerve (C6-C7)