Younger Is Not Always Better: Development of Locomotor Adaptation from Childhood to Adulthood
Open Access
- 23 February 2011
- journal article
- Published by Society for Neuroscience in Journal of Neuroscience
- Vol. 31 (8), 3055-3065
- https://doi.org/10.1523/jneurosci.5781-10.2011
Abstract
New walking patterns can be learned over short timescales (i.e., adapted in minutes) using a split-belt treadmill that controls the speed of each leg independently. This leads to storage of a modified spatial and temporal motor pattern that is expressed as an aftereffect in regular walking conditions. Because split-belt walking is a novel task for adults and children alike, we used it to investigate how motor adaptation matures during human development. We also asked whether the immature pattern resembles that of people with cerebellar dysfunction, because we know that this adaptation depends on cerebellar integrity. Healthy children (3–18 years old) and adults, and individuals with cerebellar damage were adapted while walking on split belts (1:2 speed ratio). Adaptation and de-adaptation rates were quantified separately for temporal and spatial parameters. All healthy children and adults tested could learn the new timing at the same rate and showed significant aftereffects. However, children younger than 6 years old were unable to learn the new spatial coordination. Furthermore, children as old as age 11 years old showed slower rates of adaptation and de-adaptation of spatial parameters of walking. Young children showed patterns similar to cerebellar patients, with greater deficits in spatial versus temporal adaptation. Thus, although walking is a well-practiced, refined motor skill by late childhood (i.e., 11 years of age), the processes underlying learning new spatial relationships between the legs are still developing. The maturation of locomotor adaptation follows at least two time courses, which we propose is determined by the developmental state of the cerebellum.Keywords
This publication has 42 references indexed in Scilit:
- Thinking About Walking: Effects of Conscious Correction Versus Distraction on Locomotor AdaptationJournal of Neurophysiology, 2010
- Cerebellum development during childhood and adolescence: A longitudinal morphometric MRI studyNeuroImage, 2010
- Walking flexibility after hemispherectomy: split-belt treadmill adaptation and feedback controlBrain, 2008
- Understanding sensorimotor adaptation and learning for rehabilitationCurrent Opinion in Neurology, 2008
- Microstructural maturation of the human brain from childhood to adulthoodNeuroImage, 2008
- Locomotor adaptation on a split-belt treadmill can improve walking symmetry post-strokeBrain, 2007
- Interacting Adaptive Processes with Different Timescales Underlie Short-Term Motor LearningPLoS Biology, 2006
- Interlimb Coordination During Locomotion: What Can be Adapted and Stored?Journal of Neurophysiology, 2005
- Hereditary Cerebellar Ataxia Progressively Impairs Force Adaptation During Goal-Directed Arm MovementsJournal of Neurophysiology, 2004
- Infants Adapt Their Stepping to Repeated Trip-Inducing StimuliJournal of Neurophysiology, 2003