Large Elbow Joint Training Model

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Model Number: 87739569

Brand: Niche Healthcare

12 x 12 x 33CM

Demonstrate abduction, anteversion, retroversion, internal / external rotation of the radius. Include flexible, artificial ligaments. Life-size, on stand.

SKU: NH-55297 Category: Tag:

Description

Categories         Anatomical Model

Subject               Medical Science

Material              Eco-friendly PVC

Application       School/Hospital/Laboratory

 

The elbow joint is a complex hinge joint that connects the upper arm to the forearm, allowing for a wide range of motion essential for daily activities. Here is an in-depth look at its anatomy, function, and associated ligaments:

Anatomy of the Elbow Joint

Bones Involved:

  • Humerus: The upper arm bone.
  • Radius: The lateral bone of the forearm (on the thumb side).
  • Ulna: The medial bone of the forearm (on the pinky side).

Joint Articulations:

  • Humeroulnar Joint: The primary hinge joint between the trochlea of the humerus and the trochlear notch of the ulna, allowing flexion and extension.
  • Humeroradial Joint: The joint between the capitulum of the humerus and the head of the radius, allowing for flexion, extension, and rotation.
  • Proximal Radioulnar Joint: The joint between the head of the radius and the radial notch of the ulna, allowing for pronation and supination (rotation of the forearm).

Movements

  • Flexion: Bending the elbow, decreasing the angle between the upper arm and forearm.
  • Extension: Straightening the elbow, increasing the angle between the upper arm and forearm.
  • Pronation: Rotating the forearm so the palm faces downward.
  • Supination: Rotating the forearm so the palm faces upward.

Ligaments of the Elbow Joint

Medial (Ulnar) Collateral Ligament (UCL):

  • Components: Anterior, posterior, and transverse bundles.
  • Function: Stabilizes the elbow against valgus (outward) forces.
  • Location: Extends from the medial epicondyle of the humerus to the coronoid process and olecranon of the ulna.

Lateral (Radial) Collateral Ligament (LCL):

  • Components: Radial collateral ligament and lateral ulnar collateral ligament.
  • Function: Stabilizes the elbow against varus (inward) forces.
  • Location: Extends from the lateral epicondyle of the humerus to the annular ligament and the lateral side of the ulna.

Annular Ligament:

  • Function: Encircles the head of the radius, holding it in place against the ulna and allowing smooth rotation during pronation and supination.
  • Location: Extends from the anterior to the posterior margins of the radial notch of the ulna.

Quadrate Ligament:

  • Function: Provides additional stability to the proximal radioulnar joint.
  • Location: Extends from the radial notch of the ulna to the neck of the radius.

Bursae

  • Olecranon Bursa: Located between the olecranon process of the ulna and the skin, reducing friction during movement.

Muscles Involved

  • Flexion: Biceps brachii, brachialis, brachioradialis.
  • Extension: Triceps brachii, anconeus.
  • Pronation: Pronator teres, pronator quadratus.
  • Supination: Biceps brachii, supinator.

Functionality

The elbow joint’s primary role is to position the hand for functional tasks, combining movements of flexion, extension, pronation, and supination. Proper functioning of the elbow joint and its ligaments is crucial for activities ranging from lifting and carrying to precise hand movements like writing and typing.

Clinical Relevance

Injuries to the elbow joint, such as ligament sprains, fractures, or bursitis, can significantly impair arm function and may require medical intervention, physical therapy, or, in some cases, surgery for proper healing and restoration of movement.

 

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