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Related Concept Videos

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,...
Spinal Nerves: Plexus I01:22

Spinal Nerves: Plexus I

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.
The Cervical Plexus
The cervical plexus, formed by the anterior rami of the first four...
Bones of the Upper Limb: Ulna01:15

Bones of the Upper Limb: Ulna

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 of the...
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...
Anatomical Movements00:51

Anatomical Movements

Anatomical movements refer to the various actions or motions that can be performed by the body's joints and muscles. These movements are described using specific terms to provide a standardized way of discussing and understanding the range of motion at different joints.
Here are some common anatomical movements:
Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion. These movements take place at the shoulder, hip, elbow, knee, wrist, metacarpophalangeal,...
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...

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Related Experiment Video

Updated: Jun 30, 2026

Measurement of Spatial Stability in Precision Grip
09:36

Measurement of Spatial Stability in Precision Grip

Published on: June 4, 2020

[Aspects of finger mobility].

J Koebke1

  • 1Zentrum Anatomie, Uniklinikum Köln, Kerpenerstrasse 62, 50937, Köln, Deutschland. Juergen.koebke@uk-koeln.de

Der Orthopade
|September 25, 2008
PubMed
Summary

Finger movements involve complex muscle coordination, abolishing rigid antagonist/synergist roles. The interosseous-lumbricalis system is crucial for synchronous finger flexion and extension.

Area of Science:

  • Biomechanics
  • Neuroscience
  • Human Anatomy

Context:

  • Investigates the intricate neuromuscular control of human finger and thumb movements.
  • Examines the functional integration of multiple muscle groups during complex motor tasks.
  • Challenges traditional views of muscle roles as strictly antagonists or synergists.

Purpose:

  • To elucidate the coordinated muscle actions underlying precise finger and thumb manipulation.
  • To identify the specific motor systems, including the interosseous-lumbricalis system, involved in finger flexion and extension.
  • To differentiate the unique muscular requirements for thumb opposition and repositioning compared to other fingers.

Summary:

  • Finger movements, whether centrally induced or controlled via feedback loops, necessitate the simultaneous action of diverse muscle groups.

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Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping
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Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping

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Related Experiment Videos

Last Updated: Jun 30, 2026

Measurement of Spatial Stability in Precision Grip
09:36

Measurement of Spatial Stability in Precision Grip

Published on: June 4, 2020

Three-Dimensional Finger Motion Tracking during Needling: A Solution for the Kinematic Analysis of Acupuncture Manipulation
08:27

Three-Dimensional Finger Motion Tracking during Needling: A Solution for the Kinematic Analysis of Acupuncture Manipulation

Published on: October 28, 2021

Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping
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Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping

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  • This integrated muscle action functionally negates rigid distinctions between antagonistic and synergistic muscles.
  • Synchronous finger flexion and extension rely on palmar, dorsal, and oblique (interosseous-lumbricalis) motor systems, with thumb movements requiring distinct configurations.

    • Impact:

    • Provides a deeper understanding of the neural and muscular basis of fine motor control.
    • Informs rehabilitation strategies for conditions affecting hand dexterity and function.
    • Contributes to the design of advanced prosthetic devices and robotic manipulators.