Electromyography in pathologic bladder

Reduction of bladder contractility after alpha-adrenergic blockade and after ganglionic blockade

“…Subsequently, Kolesnikov et al (1968) recorded extremely high frequency electric potentials from the detrusor muscles of both animals and humans. In addition, high frequency electric potentials have been recorded from the smooth muscle of the urinary bladder in control patients and in patients with neurogenic bladders (Jones et al 1974, LaJoie et al 1975. Amplitude and frequency of the electric potentials increased and duration decreased with increased bladder volume and pressure (Kaplan et al 1976(Kaplan et al , 1977.…”

Introduction to this Special Issue on Neurology

“…The interpretation of recordings is controversial and reports in literature show considerable variation on signal amplitude, frequency and shape (Corey et al, 1951;Boyce, 1952;Franksson & Petersen, 1953;Brunsting, 1958;Fredericks et al, 1969;Stanton et al, 1973Stanton et al, , 1974Cosgrove et al, 1974Cosgrove et al, , 1977Jones et al, 1974;Doyle et al, 1975;La Joie et al, 1975;Craggs & Stephenson, 1976, 1982, 1985Kaplan et al, 1976;Kaplan et al, 1976;Abdel-Rahman et al, 1982;Takaiwa et al, 1983aTakaiwa et al, , 1983bTakaiwa et al, , 1992Takaiwa & Shiraiwa, 1984;Jünemann et al, 1994;Shafik, 1994).…”

Bladder electrical activity: the elusive electromyogram

“…In later and more detailed clinical studies [10,11], flexible silver‐wire electrodes were inserted into the bladder wall using a hypodermic needle through the insensate anterior vaginal wall. The ECG, urethral sphincter EMG and intravesical pressure changes were simultaneous recorded in an attempt to account for extraneous physiological artefact, and to determine the real relationship of the electrical signal to mechanical events.…”