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Anatomy of the arm
Anatomy of the axilla
Anatomy of the brachial plexus
Anatomy of the elbow joint
Anatomy of the glenohumeral joint
Anatomy of the pectoral and scapular regions
Anatomy of the radioulnar joints
Anatomy of the sternoclavicular and acromioclavicular joints
Bones of the upper limb
Fascia, vessels and nerves of the upper limb
Joints of the wrist and hand
Muscles of the forearm
Muscles of the hand
Vessels and nerves of the forearm
Vessels and nerves of the hand
Anatomy clinical correlates: Arm, elbow and forearm
Anatomy clinical correlates: Axilla
Anatomy clinical correlates: Clavicle and shoulder
Anatomy clinical correlates: Median, ulnar and radial nerves
Anatomy clinical correlates: Wrist and hand
The elbow joint is a hinge type of synovial joint, and it’s actually made up of two separate joints which work together as one.
The first joint, called the humero-ulnar joint, is between the trochlea of the humerus and the trochlear notch of the ulna; and second one, called the humero-radial joint situated between the capitulum of the humerus and the superior aspect of the head of the radius.
A good way to remember this is thinking of the ‘CRAzy TULips’. The CRA in CRAzy represents the Capitulum which articulates with the RAdius, and the TUL in TULips represents the Trochlea which articulates with the ULna.
The elbow joint is covered by a synovial membrane, which is surrounded by a joint capsule.
The joint capsule extends from the margins of the articular surfaces of the capitulum and trochlea on the humerus, to the coronoid process anteriorly; and to the olecranon fossa posteriorly.
On both the medial and lateral sides, the elbow joint is strengthened by two strong ligaments called the collateral ligaments which are thickenings of the elbow joint capsule .
On the medial side, also called the ulnar side, there’s the ulnar collateral ligament, which extends from the medial epicondyle of the humerus to the coronoid process and the olecranon of the ulna.
The ulnar collateral ligament actually consists of three separate bands: anterior, posterior and oblique.
The anterior band is the strongest, and it runs from the medial epicondyle to the tubercle of the coronoid process.
This band helps limit elbow extension. Next, there’s the fan-shaped posterior band, the weakest of all, and it runs from the medial epicondyle to the olecranon of the ulna.
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