MSS Week 8 Upper Limb

Question 1

Biceps Brachii

A) Long Head

Origin
Insertion
Innervation
Action

B) Short Head

Origin
Insertion
Innervation
Action

Answer 1

Long Head:

Origin: Supraglenoid tubercle
Insertion: Radial tuberosity
Innervation: Musculocutaneous nerve
Action: Elbow flexion, Forearm Supination

Short Head:

Origin: Coracoid process
Insertion: Radial tuberosity
Innervation: Musculocutaneous nerve
Action: Elbow flexion, Forearm Supination

Question 2

Coracobrachialis

Origin
Insertion
Innervation
Action

Answer 2

Origin: coracoid process of the scapula
Insertion: medial side of the humeral shaft
Innervation: Musculocutaneous Nerve
Action: Elbow Flexion

Question 3

Brachialis

Origin
Insertion
Innervation
Action

Answer 3

Origin: Anterior surface of the humerus
Insertion: ulna tuberosity
Innervation: Musculocutaneous nerve
Action: Elbow flexion

Question 4

Branchioradialis

Origin
Insertion
Innervation
Action

Answer 4

Origin: proximal aspect of the lateral supracondylar ridge of the humerus
Insertion: lateral surface of the radius
Innervation: Radial Nerve
Action: Elbow flexion

Question 5

Triceps Brachii

A) Long Head 
Origin
Insertion
Innervation
Action

B) Lateral Head 
Origin
Insertion
Innervation
Action

C) Medial Head
Origin 
Insertion
Innervation 
Action

Answer 5

A) Long Head 
Origin: infraglenoid tubercle 
Insertion: Olecrannon of the ulna 
Innervation: Radial Nerve 
Action: Elbow Extension 

B) Lateral Head 
Origin: Humerus, superior to the radial groove 
Insertion: Olecrannon of the ulna 
Innervation: Radial Nerve 
Action: Elbow Extension 

C) Medial Head
Origin: Humerus, inferior to the radial groove 
Insertion: Olecrannon of the Ulna 
Innervation: Radial Nerve 
Action: Elbow Extension

Question 6

Supinator

Origin
Insertion
Innervation
Action

Answer 6

Origin: Lateral epicondye of the humerus and posterior surface of the ulna
Insertion: Posterior Surface of the Radius
Innervation: Radial Nerve
Action: supination of the forearm

Question 7

Pronator Teres

Origin
Insertion
Innervation
Action

Answer 7

Origin: medial epicondyle
Insertion: mid-shaft of the radius
Innervation: Median Nerve
Action: pronation of the forearm

Question 8

Pronator Quadratus

Origin
Insertion
Innervation
Action

Answer 8

Origin: Linear ridge of the ulna
Insertion: anterior surface of the radius
Innervation: Medial Nerve
Action: pronation of the forearm

Question 9

What are the boundaries of the Cubital Fossa?

Let’s Make Red Soup

Answer 9

Lateral: Brachioradialis
Medial: Pronator Teres
Roof: Bicipital aponeurosis
Superior: Line between lateral and medial epicondyles

Question 10

What are the four contents of the Cubital Fossa?

Be Brave, Ready and Mighty

Answer 10

1) Biceps Brachii Tendon
2) Brachial Artery
3) Radial Nerve
4) Medial Nerve