Properties of motor unit action potentials recorded with concentric and monopolar needle electrodes: ADEMG analysis
| Autor: | Jane E. Howard, Leslie J. Dorfman, Kevin C. McGill |
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| Rok vydání: | 1988 |
| Předmět: |
Adult
Male Physiology Action Potentials Isometric exercise Electromyography Concentric Biceps Cellular and Molecular Neuroscience Physiology (medical) medicine Humans Electrodes Mathematics Motor Neurons medicine.diagnostic_test Muscles Significant difference Anatomy Motor unit Electrophysiology Electrode Female Neurology (clinical) Biomedical engineering |
| Zdroj: | Muscle & Nerve. 11:1051-1055 |
| ISSN: | 1097-4598 0148-639X |
| DOI: | 10.1002/mus.880111007 |
| Popis: | We compared the configurational and firing properties of 7270 motor unit action potentials (MUAPs) recorded with either concentric (CNE) or monopolar (MNE) needle electrodes from the brachial biceps and anterior tibial muscles of 10 healthy young adults (mean age 27 +/- 4.5 years) using automatic decomposition electromyography (ADEMG). In both muscles, mean MUAP amplitude, rise rate, and number of turns were significantly greater when recorded with MNE (paired t-test, P less than 0.001 in each case). Similar findings were observed at all three tested levels of isometric contractile force: threshold, 10% of maximum voluntary contraction (MVC), and 30% MVC. In contrast, there was no significant difference between electrode types on measurements of mean MUAP duration or firing rate (P greater than 0.05 in each case). These findings indicate that it is acceptable to generalize normative data on MUAP duration and firing rate from one electrode type to another, but that measures of MUAP amplitude and complexity require independent normative databases. |
| Databáze: | OpenAIRE |
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