Elbow - muscles (flexion and extension)

Question 1

Name the 4 elbow flexor muscles and identify where they are located on the human body (if unable check on Complete Anatomy)

Answer 1

Long head of biceps brachii
Short head of biceps brachii
Brachialis
Brachioradialis

Question 2

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

Answer 2

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

Question 3

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

Answer 3

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

Question 4

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

Answer 4

o Origin – Anterior aspect of distal half of humerus
o Insertion – Coronoid process and tuberosity of ulna
o Innervation – Musculocutaneous (C5-C6) and radial nerves (C7)

Question 5

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

Answer 5

o Origin – Superior 2/3 of lateral supracondylar ridge of humerus
o Insertion – Lateral aspect of distal part of radius
o Innervation – Radial nerve (C5-C6)

Question 6

Name the 4 elbow extensor muscles and identify where they are located on the human body (if unable check on Complete Anatomy)

Answer 6

Long head of triceps brachii
Short head of triceps brachii
Medial head of triceps brachii
Anconeus

Question 7

What is the Origin, Insertion and Innervation of the Long head of triceps brachii muscle?

Answer 7

 Origin – Infraglenoid tubercle of scapula
 Insertion – Olecranon of ulna and adjacent antebrachial fascia
 Innervation – Radial nerve (C7)

Question 8

What is the Origin, Insertion and Innervation of the Short head of triceps brachii muscle?

Answer 8

 Origin – Posterior surface of humerus, superior to radial groove
 Insertion – Olecranon of ulna and adjacent antebrachial fascia
 Innervation – Radial nerve (C6)

Question 9

What is the Origin, Insertion and Innervation of the Medial head of triceps brachii muscle?

Answer 9

 Origin – posterior surface of humerus, inferior to radial groove
 Insertion – Olecranon of ulna and adjacent antebrachial fascia
 Innervation – Radial nerve (C8)

Question 10

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

Answer 10

o Origin – Posterior aspect of lateral epicondyle of humerus
o Insertion – Olecranon; proximal end of body of ulna
o Innervation – Radial nerve (C7-C8)