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

Initial agonist burst duration depends on movement amplitude.

S H Brown, J D Cooke

    Experimental Brain Research
    |January 1, 1984
    PubMed
    Summary

    Human arm movements utilize distinct muscle activation patterns. The central nervous system employs two distinct mechanisms for generating large amplitude movements, involving initial agonist burst modulation and a second agonist activity pulse.

    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

    Proprioceptively guided reaching movements in 3D space: effects of age, task complexity and handedness.

    Experimental brain research·2014
    Same author

    Biomedical informatics: we are what we publish.

    Methods of information in medicine·2013
    Same author

    A review of medication reconciliation issues and experiences with clinical staff and information systems.

    Applied clinical informatics·2013
    Same author

    Mouse strain-dependent variation in obesity and glucose homeostasis in response to high-fat feeding.

    Diabetologia·2013
    Same author

    Group-delay diagnostic for measuring vapor column density.

    Applied optics·2010
    Same author

    Venlafaxine treatment stimulates expression of brain-derived neurotrophic factor protein in frontal cortex and inhibits long-term potentiation in hippocampus.

    Neuroscience·2009

    Area of Science:

    • Neuroscience
    • Biomechanics
    • Human Motor Control

    Background:

    • Understanding the neural control of voluntary movements is crucial for diagnosing and treating motor disorders.
    • Electromyography (EMG) provides insights into muscle activation patterns during movement.

    Purpose of the Study:

    • To investigate the characteristics of the initial electromyography (EMG) burst during visually guided arm movements.
    • To determine how movement amplitude and speed influence EMG burst duration and composition.

    Main Methods:

    • Subjects performed visually guided, steptracking arm movements of varying amplitudes and speeds.
    • Intramuscular EMG recordings were obtained from agonist muscles (biceps and triceps).
    • Analysis focused on the duration, components, and timing of the initial agonist EMG burst relative to movement kinematics.

    Main Results:

    • Initial agonist burst duration was not continuously graded but exhibited discrete short (70 ms) and long (140 ms) durations.
    • Short bursts were associated with small amplitude movements (<20 deg), while long bursts occurred with large amplitude movements (>50 deg).
    • Large movements involved a second agonist burst component, occurring before peak velocity, originating from the same muscle.

    Conclusions:

    • The central nervous system utilizes at least two distinct neural mechanisms to generate large amplitude arm movements.
    • These mechanisms include modulating the magnitude of the initial agonist burst and generating a secondary agonist activity pulse.
    • These findings contribute to understanding the neural basis of motor control and movement generation.

    Related Experiment Videos