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Related Concept Videos

Functional Classification of Joints01:09

Functional Classification of Joints

Functional Classification of Joints
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses  or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An immobile...
Fractures: Bone Repair01:27

Fractures: Bone Repair

Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
Muscles of the Forearm that Move the Hand and Fingers01:16

Muscles of the Forearm that Move the Hand and Fingers

The muscles of the forearm that move the wrist, hand, and digits are numerous and diverse. They can be classified into two groups based on their location and function — the anterior and posterior compartment muscles.
Anterior Compartment
The anterior compartment muscles originate from the humerus. They primarily function as flexors and are also known as flexor muscles. They typically insert on the carpals, metacarpals, and phalanges. The superficial layer includes the flexor carpi radialis,...
Bones of the Upper Limb: Radius01:09

Bones of the Upper Limb: Radius

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.
The radius has a nail-shaped head, and a short...
Flail Chest-I01:24

Flail Chest-I

Overview of Flail Chest
Flail chest is a severe and potentially life-threatening condition characterized by the fracture of three or more adjacent ribs in multiple places. It is most commonly caused by direct impacts and trauma, such as motor vehicle accidents or injuries from a steering wheel impact. It can also occur due to falls in elderly individuals with osteoporosis, or assaults involving sharp objects.
Pathophysiology
The pathophysiology of flail chest is complex, involving fractures of...
Ankle Joint01:10

Ankle Joint

The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...

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Related Experiment Video

Updated: Jun 20, 2026

Metacarpal Small Incision for Carpal Tunnel Syndrome
04:08

Metacarpal Small Incision for Carpal Tunnel Syndrome

Published on: April 5, 2024

[Multiple carpometacarpal fracture-dislocation].

Alejandro G Pérez-Serna1, Francisco Figueroa-Cal y Mayor

  • 1Traumatología y Ortopedia, Facultad Mexicana de Medicina, Universidad La Salle/México. alexps77@hotmail.com

Acta Ortopedica Mexicana
|September 11, 2009
PubMed
Summary

Multiple carpometacarpal fracture dislocations are rare hand injuries. Early diagnosis with specific X-rays and prompt surgical fixation are crucial for successful outcomes and functional recovery.

Related Experiment Videos

Last Updated: Jun 20, 2026

Metacarpal Small Incision for Carpal Tunnel Syndrome
04:08

Metacarpal Small Incision for Carpal Tunnel Syndrome

Published on: April 5, 2024

Area of Science:

  • Orthopedic Surgery
  • Trauma Surgery
  • Radiology

Background:

  • Multiple carpometacarpal fracture dislocations are rare, often resulting from high-energy trauma or falls.
  • Accurate diagnosis can be challenging and requires specific radiographic views.

Observation:

  • A 27-year-old male presented with a severe right hand injury after a fall.
  • Clinical examination revealed significant swelling, pain, and functional disability.
  • Radiographs confirmed fracture dislocations of the hamate, capitate, and bases of the 3rd, 4th, and 5th metacarpals.

Findings:

  • Treatment involved closed reduction, fixation with Orthofix threaded nails, and casting.
  • The patient achieved successful bone healing without carpal bone necrosis.
  • Post-rehabilitation, the patient experienced a full functional recovery of hand joints.

Implications:

  • This case highlights the importance of specific X-ray views for diagnosing rare carpometacarpal injuries.
  • Surgical stabilization with threaded nails effectively addressed the high instability of the lesion.
  • Prompt diagnosis and treatment are essential for preventing long-term functional limitations.