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

Forces generated at the thumb interphalangeal joint during imposed sinusoidal movements

T I Brown, P M Rack, H F Ross

    The Journal of Physiology
    |November 1, 1982
    PubMed
    Summary

    This study reveals how thumb joint stiffness changes with movement speed. Increased movement frequency alters stiffness vectors, indicating distinct reflex and non-reflex contributions to thumb resistance.

    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

    Mortality in Parkinson's disease and its association with dementia and depression.

    Acta neurologica Scandinavica·2004
    Same author

    Effects of angiotensin II (AT1) receptor blockade on cardiac vagal control in heart failure.

    Clinical science (London, England : 1979)·2001
    Same author

    The influence of sample dimensions on hydroxyl ion release from calcium hydroxide products.

    Endodontics & dental traumatology·2001
    Same author

    Nitric oxide and cardiac autonomic control in humans.

    Hypertension (Dallas, Tex. : 1979)·2000
    Same author

    Tooth slice organ culture for cytotoxicity assessment of dental materials.

    Biomaterials·2000
    Same author

    A 10-year study of the incidence of and factors predicting dementia in Parkinson's disease.

    Neurology·2000

    Area of Science:

    • Biomechanics
    • Neuroscience
    • Human Motor Control

    Background:

    • Understanding thumb joint mechanics is crucial for rehabilitation and prosthetics.
    • The relationship between joint position, force, and movement frequency is complex.
    • Previous research has not fully elucidated the frequency-dependent nature of thumb joint stiffness.

    Purpose of the Study:

    • To investigate the relationship between sinusoidal movement and force fluctuations in the human thumb interphalangeal joint.
    • To characterize the frequency-dependent changes in thumb joint stiffness.
    • To differentiate between reflex and non-reflex components contributing to thumb joint resistance.

    Main Methods:

    • Driving the interphalangeal joint of the thumb through repeated sinusoidal flexion-extension movements.

    Related Experiment Videos

  • Immobilizing other wrist and hand joints to isolate thumb movement.
  • Measuring joint position and generated force sinusoids.
  • Analyzing stiffness vectors (amplitude and phase) at varying movement frequencies.

    • Main Results:

    • Thumb joint force fluctuated sinusoidally with imposed movements.
    • Maximum resistance to extension occurred in the later phase of movement, preceding maximum extension.
    • Stiffness vectors exhibited a characteristic C-shaped or spiral path with increasing frequency, moving clockwise.
    • This path suggests a combination of frequency-independent non-reflex stiffness and frequency-dependent reflex activity.

    Conclusions:

    • The size and path of stiffness vectors provide insights into reflex and non-reflex contributions to thumb joint resistance.
    • The observed frequency-dependent changes in stiffness are primarily attributed to reflex pathway delays.
    • This research offers a method to quantify reflex and non-reflex stiffness in biological joints.