期刊
EXPERIMENTAL BRAIN RESEARCH
卷 153, 期 1, 页码 123-127出版社
SPRINGER
DOI: 10.1007/s00221-003-1635-x
关键词
growth curve; ontogeny; children; gait; velocity; mathematical model
When two fundamental gait parameters-step length and step frequency-are scaled non-dimensionally, thereby accounting for increases in a childs physical size, ontogenetic changes in the locomotor control strategy are revealed. We believe dimensionless velocity beta, the product of dimensionless step length and frequency, serves as a measure of neural development. It increases from the age of 18 months and reaches a plateau between 50 and 90 months, attaining the adult value of 0.45. Based on a study of 200 children, our findings lend support to a theory that posits a neuromaturation growth curve with the form: beta (t)=0.45 (1 -e(-0.05t)) where t is the age in months and 0.05 is the growth coefficient.
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