The Elbow Complex - Muscles & Tendons

3. Muscles and tendons (6-minutes): Identification and palpation of key muscles and tendons, demonstration of their actions, and explanation of relevant origins and insertions. You may also be asked to demonstrate basic muscle testing where appropriate. Follow-up questions may explore contraction type and structure/function. "Tell me what you know about the muscles acting at the elbow complex."

How many Elbow Flexor muscles are there?

Three

How many Elbow Extensor muscles are there?

One

Name the three Elbow Flexor muscles.

Biceps Brachii, Brachialis, Brachioradialis

What is the origin of Biceps Brachii Long Head?

Supra-Glenoid Tubercle

What is the origin of Biceps Brachii Short Head?

Coracoid Process

What is the insertion of Biceps Brachii?

Radial Tuberosity

What is the action of Biceps Brachii?

Humeroulnar Flexion (the Sagittal plane)

Glenohumeral Flexion (the Sagittal plane)

Flexion in a supinated forearm

What is the antagonist of Biceps Brachii?

The elbow extensors, the shoulder extensors

What is the nerve supply of Biceps Brachii?

The Musculocutaneous nerve

What is the origin of Brachialis?

Lower half of the anterior Humerus

What is the insertion of Brachialis?

Coronoid Process of the Ulna

What is the action of Brachialis?

Humeroulnar Flexion (the Sagittal plane)

Flexion in a pronated forearm

What is the antagonist of Brachialis?

The elbow extensors

What is the nerve supply of Brachialis?

The Musculocutaneous nerve

What is the origin of Brachioradialis?

Proximal to the Lateral Epicondyle of the Humerus

What is the insertion of Brachioradialis?

Styloid Process of the Radius

What is the action of Brachioradialis?

Humeroulnar Flexion (the Sagittal plane)

Flexion in a mid-pronated forearm

What is the antagonist of Brachioradialis?

The elbow extensors

What is the nerve supply of Brachioradialis?

The Radial nerve

Name the one Elbow Extensor muscle.

Triceps Brachii

What is the origin of Triceps Brachii Long Head?

Infra-Glenoid Tubercle

What is the origin of Triceps Brachii Medial Head?

Distal to the Radial Groove

What is the origin of Triceps Brachii Lateral Head?

Proximal to the Radial Groove

What is the insertion of Triceps Brachii?

The Olecranon

What is the action of Triceps Brachii Long Head?

Humeroulnar Extension (the Sagittal plane)

Glenohumeral Extension (the Sagittal plane)

What is the action of Triceps Brachii?

Humeroulnar Extension (the Sagittal plane)

What is the antagonist of Triceps Brachii Long Head?

The elbow flexors, the shoulder flexors

What is the antagonist of Triceps Brachii?

The elbow flexors

What is the nerve supply of Triceps Brachii?

The Radial nerve