Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

The A3 pulley.

C F Zhao1, P C Amadio, L Berglund

  • 1Biomechanics Laboratory, Division of Orthopedic Research, Mayo Clinic and Mayo Foundation, Rochester, MN 55905, USA.

The Journal of Hand Surgery
|March 21, 2000
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

[Long-term hypomethylating agents in patients with myelodysplastic syndromes: a multi-center retrospective study].

Zhonghua xue ye xue za zhi = Zhonghua xueyexue zazhi·2024
Same author

[Coefficient of variation of heart rate and blood pressure in rapid identification of children with suspected orthostatic intolerance].

Zhonghua er ke za zhi = Chinese journal of pediatrics·2022
Same author

[The expression of clock gene CLOCK and its clinical significance in nasopharyngeal carcinoma].

Zhonghua zhong liu za zhi [Chinese journal of oncology]·2021
Same author

[Analysis of seven cases of multiple myeloma with initial manifestation of bleeding].

Zhonghua nei ke za zhi·2021
Same author

Infestation and distribution of chigger mites on Brown rat (Rattus norvegicus) in Yunnan Province, Southwest China.

Tropical biomedicine·2021
Same author

The revitalisation of flexor tendon allografts with bone marrow stromal cells and mechanical stimulation: An <i>ex vivo</i> model revitalising flexor tendon allografts.

Bone & joint research·2017
Same journal

Current Concepts in Perioperative Guidance and Outcomes in Hand Surgery Patients Taking Glucagon-Like Peptide-1 Receptor Agonists.

The Journal of hand surgery·2026
Same journal

Mesenchymal Stem Cell-Derived Exosomes Combined With 3-Dimensional Hyaluronan-Based Scaffold Promote Tendon-to-Bone Tunnel Healing.

The Journal of hand surgery·2026
Same journal

The Diagnosis and Management of Clenched Fist Syndrome.

The Journal of hand surgery·2026
Same journal

Ultrasound-Assisted Thin Posteromedial Thigh Free Flap for Coverage of Hand and Upper-Extremity Wounds.

The Journal of hand surgery·2026
Same journal

Comparison of One- and Two-knot Techniques in Eight-Strand Flexor Tendon Repair Using Looped Sutures: A Biomechanical Study in a Porcine Model.

The Journal of hand surgery·2026
Same journal

Biomechanical Comparison of Metal Versus Suture and Screw Tension Band Technique for Olecranon Fractures.

The Journal of hand surgery·2026
See all related articles

The A3 pulley reduces finger tendon gliding resistance by maintaining a smaller tendon-pulley angle during flexion. Its removal increases this angle and resistance, impacting finger movement.

Area of Science:

  • Orthopedic biomechanics
  • Human anatomy
  • Musculoskeletal system research

Background:

  • Tendon gliding is crucial for finger flexion.
  • The role of specific pulleys, like the A3 pulley, in modulating this gliding is not fully understood.
  • Understanding pulley function is vital for treating tendon injuries and improving surgical outcomes.

Purpose of the Study:

  • To investigate the biomechanical effect of the A3 pulley on flexor digitorum profundus tendon gliding resistance.
  • To quantify changes in tendon-pulley angles with and without the A3 pulley during finger flexion.
  • To determine the relationship between tendon-pulley angle and gliding resistance.

Main Methods:

  • Comparison of tendon-pulley geometry and gliding resistance in 6 human cadaver fingers.

Related Experiment Videos

  • X-ray imaging to measure A2 and A4 pulley-tendon angles at varying proximal interphalangeal joint flexion (0-120 degrees).
  • Measurement of flexor digitorum profundus tendon gliding resistance under the A2 pulley before and after A3 pulley resection.

    • Main Results:

    • A3 pulley resection significantly increased the tendon-pulley angle compared to the intact state.
    • Gliding resistance increased quadratically with increasing tendon-pulley angle (0-60 degrees).
    • The A3 pulley plays a significant role in maintaining optimal tendon-pulley geometry.

    Conclusions:

    • The A3 pulley helps reduce flexor tendon gliding resistance.
    • This reduction is achieved by maintaining a smaller tendon-pulley angle during finger flexion.
    • Findings suggest the A3 pulley's importance in normal finger function and potential implications for injury management.