Jonathan B. Dingwell
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A model of task-level human stepping regulation yields semistable walking Open
A simple lateral dynamic walker, with swing leg dynamics and three adjustable input parameters, is used to study how motor regulation affects frontal-plane stepping. Motivated by experimental observations and phenomenological models, we im…
Probability of Lateral Instability While Walking on Winding Paths Open
People with balance impairments often struggle performing turns or lateral maneuvers, which can increase risk of falls and injuries. Here we asked how people’s mediolateral balance is impacted when walking on non-straight winding paths. Tw…
Adapting Lateral Stepping Control to Walk on Winding Paths Open
Most often, gait biomechanics is studied during straight-ahead walking. However, real-life walking imposes various lateral maneuvers people must navigate. Such maneuvers challenge people’s lateral balance and can induce falls. Determining …
A model of task-level human stepping regulation yields semistable walking Open
A simple lateral dynamic walker, with swing leg dynamics and three adjustable input parameters, is used to study how motor regulation affects frontal plane stepping. Motivated by experimental observations and phenomenological models, we im…
How Older Adults Maintain Lateral Balance While Walking on Narrowing Paths Open
Background Older adults have difficulty maintaining side-to-side balance while navigating daily environments. Losing balance in such circumstances can lead to falls. We need to better understand how older adults adapt lateral balance to na…
Generalizing Stepping Concepts To Non-Straight Walking Open
People rarely walk in straight lines. Instead, we make frequent turns or other maneuvers. Spatiotemporal parameters fundamentally characterize gait. For straight walking, these parameters are well-defined for that task of walking on a stra…
How Older Adults Regulate Lateral Stepping on Narrowing Walking Paths Open
Walking humans often navigate complex, varying walking paths. To reduce falls, we must first determine how older adults purposefully vary their steps in contexts that challenge balance. Here, 20 young (21.7±2.6 yrs) and 18 older (71.6±6.0 …
How Healthy Older Adults Enact Lateral Maneuvers While Walking Open
Background Walking requires frequent maneuvers to navigate changing environments with shifting goals. Humans accomplish maneuvers and simultaneously maintain balance primarily by modulating their foot placement, but a direct trade-off betw…
Adaptive multi-objective control explains how humans make lateral maneuvers while walking Open
To successfully traverse their environment, humans often perform maneuvers to achieve desired task goals while simultaneously maintaining balance. Humans accomplish these tasks primarily by modulating their foot placements. As humans are m…
Viability, task switching, and fall avoidance of the simplest dynamic walker Open
Walking humans display great versatility when achieving task goals, like avoiding obstacles or walking alongside others, but the relevance of this to fall avoidance remains unknown. We recently demonstrated a functional connection between …
Adaptive Multi-Objective Control Explains How Humans Make Lateral Maneuvers While Walking Open
To successfully traverse their environment, humans often perform maneuvers to achieve desired task goals while simultaneously maintaining balance. Humans accomplish these tasks primarily by modulating their foot placements. As humans are m…
Viability, task switching, and fall avoidance of the simplest dynamic walker Open
Humans display great versatility when performing goal-directed tasks while walking. However, the extent to which such versatility helps with fall avoidance remains unclear. We recently demonstrated a functional connection between the motor…
Rethinking Margin of Stability: Incorporating Step-To-Step Regulation to Resolve the Paradox Open
Derived from inverted pendulum dynamics, mediolateral Margin of Stability ( MoS ML ) is a mechanically-grounded measure of instantaneous stability. However, average MoS ML measures yield paradoxical results. Gait pathologies or perturbatio…
Cross-Sectional Study Using Virtual Reality to Measure Cognition Open
Dual-task research is limited in its transferability to authentic contexts because laboratory conditions do not replicate real-world physical activity and decision-making scenarios. Creating valid, reliable methodologies to assess physiolo…
Task-level regulation enhances global stability of the simplest dynamic walker Open
Much remains unknown about how considerations such as stability and energy minimization shape the way humans walk. While active neuromotor control keeps humans upright, they also need to choose from multiple stepping regulation strategies …
Humans use multi-objective control to regulate lateral foot placement when walking Open
A fundamental question in human motor neuroscience is to determine how the nervous system generates goal-directed movements despite inherent physiological noise and redundancy. Walking exhibits considerable variability and equifinality of …
Obstacle Avoidance and Secondary Task Performance During Locomotion Open
In the US, 1,506 people were treated in emergency room for an injury caused due to using cell while walking, in 2010 (Nasar, 2013). The underlying mechanisms for interference of locomotion by a secondary task is not well understood. Studie…