High-gain visual feedback exacerbates ankle movement variability in children
| Autor: | Changki Kim, MinHyuk Kwon, Emily J. Fox, Hwasil Moon, Evangelos A. Christou, Yen-Ting Chen |
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| Rok vydání: | 2015 |
| Předmět: |
Male
medicine.medical_specialty Visual perception Neurology Movement Electromyography Visual feedback Young Adult Physical medicine and rehabilitation medicine Humans Child Muscle Skeletal Feedback Physiological Analysis of Variance medicine.diagnostic_test Movement (music) General Neuroscience Age Factors Evoked Potentials Motor medicine.anatomical_structure Visual Perception Physical therapy Female Analysis of variance Ankle Psychology Range of motion Photic Stimulation |
| Zdroj: | Experimental Brain Research. 233:1597-1606 |
| ISSN: | 1432-1106 0014-4819 |
| Popis: | The purpose was to compare the effect of low- and high-gain visual feedback on ankle movement variability and muscle activation in children and young adults. Six young adults (19.8 ± 0.6 years) and nine children (9.4 ± 1.6 years) traced a sinusoidal target by performing ankle plantar/dorsiflexion movements. The targeted range of motion was 10°, and the frequency of the sinusoidal target was 0.4 Hz for 35 s. Low-gain visual feedback was 0.66°, and high-gain visual feedback was 4.68°. Surface EMG was recorded from the tibialis anterior (TA) muscle. Movement variability amplitude was quantified as the standard deviation of the position fluctuations after the task frequency was removed with a notch filter (second-order; 0.3–0.5 Hz). We quantified the oscillations in movement variability and TA EMG burst using the following frequency bands: 0–0.3, 0.3–0.6, 0.6–0.9, 0.9–1.2, and 1.2–1.5 Hz. Children exhibited greater movement variability than young adults, which was exacerbated during the high-gain visual feedback condition (P |
| Databáze: | OpenAIRE |
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