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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...
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...
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...
Development of the Limb Synovial Joints01:07

Development of the Limb Synovial Joints

Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
Structural Joints: Cartilaginous Joints01:17

Structural Joints: Cartilaginous Joints

As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary or...

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Related Experiment Video

Updated: Jun 4, 2026

Metacarpal Small Incision for Carpal Tunnel Syndrome
04:08

Metacarpal Small Incision for Carpal Tunnel Syndrome

Published on: April 5, 2024

Multiple carpometacarpal volar dislocation.

Iftikhar Ahmad Kahlon1, Abdul Karim, Zaman Khan

  • 1Department of Orthopaedic Surgery, Postgraduate Medical Institute/Lahore General Hospital, Lahore.

Journal of the College of Physicians and Surgeons--Pakistan : JCPSP
|February 1, 2011
PubMed
Summary
This summary is machine-generated.

A rare case of volar dislocation in multiple carpometacarpal joints occurred after a road accident. Surgical reduction and fixation led to satisfactory hand function recovery.

Related Experiment Videos

Last Updated: Jun 4, 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 Care

Background:

  • Carpometacarpal (CMC) joint dislocations are uncommon hand injuries.
  • Multiple CMC joint dislocations, particularly volar, are exceptionally rare.

Observation:

  • A 25-year-old male presented with acute left hand pain and deformity post-road traffic accident.
  • Inability to move the left hand was noted.
  • Radiographic imaging revealed volar dislocation of all four medial carpometacarpal joints.

Findings:

  • The dislocated carpometacarpal joints were successfully reduced.
  • Fixation was achieved using Kirschner wires (K-wires).
  • Immobilization was maintained with a slab for 8 weeks, followed by K-wire removal.

Implications:

  • This case highlights a successful management strategy for a rare hand injury.
  • Prompt diagnosis and surgical intervention are crucial for favorable outcomes.
  • Satisfactory hand function recovery is achievable with appropriate treatment.