Hand dominance during constant force isometric contractions: evidence of different cortical drive commands
| Autor: | Carla Patrícia Novais Luz, Rafael Pereira, Cláudia Virgínia Galindo Cavalcanti, Ivna Vidal Freire, Osmar Pinto Neto |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Adult
Male medicine.medical_specialty Time Factors Physiology Sensory system Isometric exercise Electromyography Motor Activity Functional Laterality Lateralization of brain function Young Adult Physical medicine and rehabilitation Forearm Feedback Sensory Isometric Contraction Physiology (medical) Hand strength Neural Pathways medicine Humans Orthopedics and Sports Medicine Muscle Skeletal Constant force Cerebrum Cerebral Cortex Analysis of Variance Hand Strength Proprioception medicine.diagnostic_test business.industry Public Health Environmental and Occupational Health General Medicine Hand medicine.anatomical_structure Female business Photic Stimulation |
| Zdroj: | European Journal of Applied Physiology. 112:2999-3006 |
| ISSN: | 1439-6327 1439-6319 |
| DOI: | 10.1007/s00421-011-2278-4 |
| Popis: | The purpose of this study was to investigate force variability and sensoriomotor strategies of dominant and nondominant hands of right and left-handed subjects during a submaximal isometric force production task. Twelve right-handed adults (9 men and 3 women; 23 ± 3 year) and twelve left-handed adults (4 men and 8 women; 24 ± 3 year) performed an isometric constant force contraction sustained at 30 and 50% of maximal force for 10 s. Surface EMG signals were obtained from forearm flexors and extensors. Force signals were analyzed in the time (CV of force) and frequency (0-10 Hz) domain. The neural activation of the involved muscles was investigated from the EMG structure using the cross-wavelet spectra of the interference EMG signals of six different frequency bands of the EMG signals were quantified (5-13, 13-30, 30-60, 60-100, 100-150 and 150-200 Hz). The major findings were: (1) dominant and nondominant hands of right- and left-handed subjects exhibited similar CV of force; (2) the power spectrum of force is influenced by handedness, with greater 1-3 Hz oscillations for left-handed subjects when compared to right-handed subjects; (3) right-handed subjects have greater 30-60 Hz neuromuscular activation when compared to left-handed subjects. Our results indicate that right-handed individuals may rely preferentially in visual feedback to carry out a task with visual and proprioceptive feedback because of the left hemisphere specialization on the visuomotor control. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink