Humeroulnar Joint(Elbow)

Presented by Joy and Misty

Anterior Surface Anatomy

Cubital Fossa

Medial Bicipital line

Posterior Surface AnatomyLateral Epicondyle

• Hinge joint- simple joint where the articulating surfaces allow for motion in only one direction

•Pivot Joint- allows one bone to rotate around another bone

Synovial joint- capsule that contains synovial fluid which nourishes articular cartilage and lubricating the articulating surfaces. Synovial joints are usually reinforced by accessory

ligaments

Ligaments

• A ligament is a strip or sheet of tough collagenous connective tissue that attaches a muscle to a bone.

Bursa- A fibrous sac filled with synovial fluid located between adjacent muscles or where a tendon passes over a bone

Ulnar Tuberosity

Trochlear Notch

Muscles of Extension•Triceps brachii

O

O

Lateral head Inferior to greaterTubercle on posterior humerus

Medial headPosterior surface of humerus

IAll heads-Olecranon processof Ulna

O

Long headInfraglenoid tubercle

of the scapula

Radial nerveDeep Brachial artery

O- Long Head

O- short head

I- both Radial

tuberosity

Muscles of Flexion

Biceps

BrachialisO

I

Brachioradialis

lateral supracondylar

ridge of humerus

I- styliod process radius

OSupraglenoid tubercle

Coracoid process scapula

Distal half of humerus

anterior surface

Coronoid process and

ulnar tuberosity

Radial nerveRadial artery

Musculocutaneous nerve

Brachial artery

Muscles of Pronation

Pronator teres

Pronator quadratus

O

O

Medial epicondyle of HumerusAnd corinoid process of Ulna

ILateral aspect of radius at its midpoint

Median nerveUlnar artery

O I Distal fourthOf radius

Distal fourth of Ulna

Median nerve Anterior interosseousartery

(also assists in elbow flexion)

Muscles of SupinationSupinator

O

O

Lateral Epicondyle ofHumerus andadjacent Ulna

I Anterior surface of the proximal radius ( wraps around )

Radial nerveInterosseous artery Biceps

I Radial tuberosity of radius

Arteries

Veins

Nerves

Clinical Concerns