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Cognition and balance control: does processing of explicit contextual cues of impending perturbations modulate automatic postural responses?
- Source :
- Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual), Universidade de São Paulo (USP), instacron:USP
- Publication Year :
- 2017
-
Abstract
- Processing of predictive contextual cues of an impending perturbation is thought to induce adaptive postural responses. Cueing in previous research has been provided through repeated perturbations with a constant foreperiod. This experimental strategy confounds explicit predictive cueing with adaptation and non-specific properties of temporal cueing. Two experiments were performed to assess those factors separately. To perturb upright balance, the base of support was suddenly displaced backwards in three amplitudes: 5, 10 and 15 cm. In Experiment 1, we tested the effect of cueing the amplitude of the impending postural perturbation by means of visual signals, and the effect of adaptation to repeated exposures by comparing block versus random sequences of perturbation. In Experiment 2, we evaluated separately the effects of cueing the characteristics of an impending balance perturbation and cueing the timing of perturbation onset. Results from Experiment 1 showed that the block sequence of perturbations led to increased stability of automatic postural responses, and modulation of magnitude and onset latency of muscular responses. Results from Experiment 2 showed that only the condition cueing timing of platform translation onset led to increased balance stability and modulation of onset latency of muscular responses. Conversely, cueing platform displacement amplitude failed to induce any effects on automatic postural responses in both experiments. Our findings support the interpretation of improved postural responses via optimized sensorimotor processes, at the same time that cast doubt on the notion that cognitive processing of explicit contextual cues advancing the magnitude of an impending perturbation can preset adaptive postural responses.
- Subjects :
- Adult
Male
Posture
Perturbation (astronomy)
Adaptation (eye)
050105 experimental psychology
03 medical and health sciences
Young Adult
0302 clinical medicine
Cognition
Humans
0501 psychology and cognitive sciences
Latency (engineering)
Control (linguistics)
Muscle, Skeletal
Postural Balance
Balance (ability)
Communication
business.industry
Electromyography
General Neuroscience
05 social sciences
Experimental strategy
EQUILÍBRIO
Balance perturbation
Female
Cues
Psychology
business
Neuroscience
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 14321106
- Volume :
- 235
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- Experimental brain research
- Accession number :
- edsair.doi.dedup.....38b892ee235aedd853cfc9b5fbfdeb29