Health

What structure passes through the cubital tunnel? The ulnar nerve passes through the cubital tunnel posterior to the medial epicondyle

What are the borders of the cubital tunnel? The cubital tunnel is the channel through which the ulnar nerve passes at the elbow between the medial epicondyle and the olecranon. The roof of the cubital tunnel is formed by the cubital tunnel retinaculum, normally a thin fibrous structure that extends from the olecranon to the …

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Importance of the lateral ulnar collateral ligament The LUCL acts as a sling that extends around the posterior radial head and neck and is the primary stabilizer to varus stress. Disruption of the LUCL leads to posterolateral rotatory instability. The LUCL is frequently disrupted following posterior elbow dislocations.

Which component of the UCL is the primary restraint to valgus stress? The anterior bundle of the UCL, which arises from the inferior aspect of the medal epicondyle and extends to the medial aspect of the coronoid process (known as the sublime tubercle), is the primary restraint to valgus stress at the elbow.

Components of the lateral ligament complex of the elbow Radial collateral ligament, lateral ulnar collateral ligament (LUCL), and annular ligament. The annular ligament is attached to the ulna and wraps around the radial head, acting as the primary stabilizer of the radioulnar joint and preventing dislocation of the radial head. The radial collateral ligament extends …

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Function of the ulnar collateral ligament (UCL), and what are its components? The UCL, also known as the medial collateral ligament (MCL), is a focal thickening of the medial joint capsule. It stabilizes the medial aspect of the elbow and resists valgus stress. The UCL is comprised of three components: the anterior bundle, posterior bundle, …

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Common extensor tendon, and where does it originate? The common extensor tendon refers to the common origin of the extensor muscles of the forearm including the extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum communis, extensor carpi ulnaris, and extensor digiti minimi muscles. It originates from the lateral epicondyle, which is the bony …

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