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Related Concept Videos

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

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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.
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The muscles that move the forearms can be divided into four groups: forearm flexors, forearm extensors, forearm pronators, and forearm supinators. The flexors and extensors act on the elbow joint, while the pronators and supinators act on the radioulnar joints.
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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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Updated: Mar 15, 2026

Functional MRI in Conjunction with a Novel MRI-compatible Hand-induced Robotic Device to Evaluate Rehabilitation of Individuals Recovering from Hand Grip Deficits
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[Simulated Total Wrist Fusion and its Influence on Hand Grip Function].

J Gülke1, H Schöll2, T Kapapa1

  • 1Klinik für Unfall-, Hand-, Plastische- und Wiederherstellungschirurgie, Universitätsklinik Ulm, Ulm.

Handchirurgie, Mikrochirurgie, Plastische Chirurgie : Organ Der Deutschsprachigen Arbeitsgemeinschaft Fur Handchirurgie : Organ Der Deutschsprachigen Arbeitsgemeinschaft Fur Mikrochirurgie Der Peripheren Nerven Und Gefasse : Organ Der V
|September 1, 2016
PubMed
Summary
This summary is machine-generated.

Simulated wrist fusion does not impact finger movement but significantly reduces grip strength in a flexed position. This finding is crucial for patients undergoing bilateral wrist fusion surgery.

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Area of Science:

  • Orthopedics
  • Hand Surgery
  • Biomechanics

Background:

  • Wrist fusion is a common surgical procedure for advanced arthritis.
  • Patients often fear functional limitations post-surgery.
  • Understanding the impact on grip function is essential for patient counseling.

Purpose of the Study:

  • To evaluate how simulated wrist fusion in different positions affects dynamic grip function and strength.
  • To assess the influence of restricted wrist motion on various grip types.

Main Methods:

  • Nineteen healthy subjects participated in the study.
  • Wrist fusion was simulated in 20° extension and 20° flexion.
  • A TUB sensor glove dynamically recorded finger joint range of motion (ROM) and grip strength during standardized grip tasks.

Main Results:

  • Simulated wrist fusion in 20° extension did not affect finger ROM, grip speed, or strength.
  • Fusion in 20° flexion did not influence finger ROM or grip speed.
  • A significant decrease in grip strength (23-42%) was observed in the 20° flexion position compared to extension or healthy wrists.

Conclusions:

  • Lack of wrist motion does not impede finger movement during forceful hand grip at normal speeds.
  • A notable reduction in grip strength occurs with the wrist in a flexed position after fusion.
  • This loss of grip strength in flexion should be considered for patients requiring bilateral wrist fusion.