Electromyographic basis of inaccurate movement; its dependence upon the mode of muscle contraction
| Autor: | R. Bronks, Justin C. Brown |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Adult
Male Time Factors Physiology Movement Electromyography Concentric Physiology (medical) medicine Eccentric Humans Orthopedics and Sports Medicine medicine.diagnostic_test Chemistry Muscles Public Health Environmental and Occupational Health Motor control Body movement General Medicine Anatomy Hand Intensity (physics) Electrophysiology Motor Skills Female medicine.symptom Muscle contraction Muscle Contraction |
| Zdroj: | European journal of applied physiology and occupational physiology. 62(3) |
| ISSN: | 0301-5548 |
| Popis: | The electromyographic basis of inaccurate performance was investigated in two rapid precision-grip skills controlled by concentric and eccentric muscle contractions respectively. Surface electromyograms, recorded from the first dorsal interosseous (DI), adductor pollicis (AP) and abductor pollicis brevis, were utilised to identify changes in the timing and intensity of muscle activation which may be responsible for inaccurate performance. The results showed that when fast precision-grip skills were controlled by concentric DI and AP muscle contractions, variations in the intensity of muscle contraction were responsible for inaccurate performance. However, when these skills were controlled by eccentric DI and AP muscle contractions, inaccurate performance resulted from variations in the timing of muscle activation. It was concluded that the nature of the deficiency in the patterns of muscle activation resulting in inaccurate performance was dependent upon the type of muscle contraction used in the skill. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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