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Related Concept Videos

Muscles of the Forearm that Move the Hand and Fingers01:16

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The ulna and radius are parallel bones of the antebrachium or the forearm. The ulna lies medially and consists of a bony tip called the olecranon process at its proximal end. This hook-like projection articulates with the olecranon fossa of the humerus and forms the "hinged" ulnohumeral part of the elbow joint. This joint facilitates forearm extension and flexion while preventing its hyperextension. Similarly, the coronoid process, another bony projection on the proximal/anterior side...
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Nerve plexuses are networks of interlacing nerves that serve as communication hubs to distribute and organize nerve action across various body regions. The nerve plexuses are organized into the cervical plexus located in the neck region, brachial plexus in the shoulder area, lumbar plexus found in the lower back, sacral plexus situated in the pelvis, and coccygeal plexus located in the coccygeal region.
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The radius is longer of the two bones that make up the human antebrachium or forearm. At the proximal end, the radius articulates with the capitulum of the humerus and the radial notch of the ulna to form the elbow joint. At the distal end, the radius articulates with the ulna via the ulnar notch, forming the distal radioulnar joint. Distally, the radius also attaches to the carpal wrist bones (scaphoid and lunate) to form the radiocarpal joint.
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Bones of the Upper Limb: Humerus01:19

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The upper limb consists of the arm, forearm, wrist, and hand bones. The humerus is the single bone of the upper arm region. Proximally, it has a large, spherical, smooth head that articulates with the glenoid cavity of the scapula to form the glenohumeral or shoulder joint. The margin of the head is the anatomical neck, a residual epiphyseal plate. Laterally it extends to form bony projections called the greater tubercle and the lesser tubercle. Next to the tubercles is the surgical neck, a...
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Hyperextension mallet finger.

R H Lange, W D Engber

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    Summary
    This summary is machine-generated.

    Mallet finger injuries vary, with the hyperextension type needing special care due to intraarticular fractures and volar subluxation. Prompt recognition and modified treatment are crucial for better outcomes in mallet finger management.

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    Area of Science:

    • Orthopedic surgery
    • Hand surgery
    • Traumatology

    Background:

    • Mallet finger injuries involve the distal extensor mechanism.
    • Pathology ranges from simple tendon avulsions to complex fractures.
    • The hyperextension variant presents unique challenges.

    Discussion:

    • This variant involves significant intraarticular fracture fragments.
    • Volar subluxation of the distal phalanx is a key characteristic.
    • Standard mallet finger treatments may be insufficient.

    Key Insights:

    • Specific injury mechanisms necessitate modified management approaches.
    • Both open and closed treatment strategies require adaptation.
    • Persistent volar subluxation is linked to poor patient outcomes.

    Outlook:

    • Further research into tailored surgical techniques is warranted.
    • Developing standardized protocols for this variant could improve results.
    • Early and accurate diagnosis is essential for effective intervention.