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Related Experiment Videos

Vesicourethral electromyography: facts or artefacts

M Abdel-Rahman, A Coulombe, A Abdel-Hakim

    British Journal of Urology
    |August 1, 1982
    PubMed
    Summary

    This study found no consistent electromyographic patterns in cat bladders during filling or voiding. The mechanism of bladder excitation-contraction coupling remains unidentified, cautioning clinical use of bladder electromyography.

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    Area of Science:

    • Urology
    • Neurophysiology
    • Animal Physiology

    Background:

    • Bladder electromyography (EMG) is used to assess bladder and urethral function.
    • Understanding the electrical activity of the bladder is crucial for diagnosing and treating urinary disorders.

    Purpose of the Study:

    • To investigate the electromyographic activity of the vesicourethral system in cats.
    • To identify potential electrical patterns associated with bladder filling, voiding, and contraction.
    • To explore the underlying mechanisms of bladder excitation-contraction coupling.

    Main Methods:

    • Extracellular and intracellular electromyography (EMG) was performed on 21 cats.
    • Bladder and urethral muscle activity was monitored using extracellular electrodes.
    • In vitro experiments utilized glass microelectrodes on bladder strips in Krebs solutions.

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    Main Results:

    • No consistent electromyographic patterns (slow or fast waves) were observed in the bladder or urethra.
    • Most recorded waves were identified as artefacts.
    • No spike activity was detected during spontaneous or stimulated contractions in vitro.

    Conclusions:

    • The study failed to identify a clear electromyographic basis for bladder and urethral function in cats.
    • The mechanism of excitation-contraction coupling in the bladder remains elusive.
    • Clinical interpretation of bladder electromyography (EMG) requires significant caution due to these findings.