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Humeroulnar Joint
(Elbow)
Presented by
Joy and Misty
Anterior Surface Anatomy
Cubital Fossa
Medial Bicipital
line
Posterior Surface Anatomy
Lateral 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
Trochlear
Notch
Ulnar Tuberosity
Muscles of Extension
•Triceps brachii
Long head
Infraglenoid tubercle
of the scapula
O
Lateral head
Inferior to greater
Tubercle on
posterior humerus
O
O
Medial head
Posterior surface
of humerus
Radial nerve
Deep Brachial artery
I
All headsOlecranon process
of Ulna
Muscles of Flexion
Supraglenoid
tubercle
O
lateral
supracondylar
ridge of
humerus
O- Long Head
O- short head
Coracoid
process
scapula
Brachioradialis
Biceps
Distal half of
humerus
anterior
surface
I- both
O
Radial nerve
Radial artery
Brachialis
Musculocutaneous
nerve
Brachial artery
I- styliod
process radius
Radial
tuberosity
I
Coronoid
process and
ulnar
tuberosity
Muscles of Pronation
Pronator quadratus
Distal fourth
of Ulna
Median nerve
Ulnar artery
O
I
Distal fourth
Of radius
O
Medial epicondyle of Humerus
And corinoid process of Ulna
O
Pronator teres
(also assists in elbow flexion)
I
Lateral aspect of radius at
its midpoint
Median nerve
Anterior interosseous
artery
Muscles of Supination
Supinator
Lateral
Epicondyle of
Humerus and
adjacent Ulna
O
O
Radial nerve
Interosseous artery
Biceps
I
Anterior surface of the
proximal radius
( wraps around )
I
Radial tuberosity
of radius
Arteries
Veins
Nerves
Clinical Concerns