Search Results

You are looking at 1 - 6 of 6 items for :

  • "neural control of movement" x
  • Refine by Access: Content accessible to me x
Clear All
Full access

Should the Equilibrium Point Hypothesis (EPH) Be Considered a Scientific Theory?

Robert L. Sainburg

The purpose of this commentary is to discuss factors that limit consideration of the equilibrium point hypothesis as a scientific theory. The EPH describes control of motor neuron threshold through the variable lambda, which corresponds to a unique referent configuration for a muscle, joint, or combination of joints. One of the most compelling features of the equilibrium point hypothesis is the integration of posture and movement control into a single mechanism. While the essential core of the hypothesis is based upon spinal circuitry interacting with peripheral mechanics, the proponents have extended the theory to include the higher-level processes that generate lambda, and in doing so, imposed an injunction against the supraspinal nervous system modeling, computing, or predicting dynamics. This limitation contradicts evidence that humans take account of body and environmental dynamics in motor selection, motor control, and motor adaptation processes. A number of unresolved limitations to the EPH have been debated in the literature for many years, including whether muscle resistance to displacement, measured during movement, is adequate to support this form of control, violations in equifinality predictions, spinal circuits that alter the proposed invariant characteristic for muscles, and limitations in the description of how the complexity of spinal circuitry might be integrated to yield a unique and stable equilibrium position for a given motor neuron threshold. In addition, an important empirical limitation of EPH is the measurement of the invariant characteristic, which needs to be done under a constant central state. While there is no question that the EPH is an elegant and generative hypothesis for motor control research, the claim that this hypothesis has reached the status of a scientific theory is premature.

Open access

Introduction to the Special Z-Issue in Honor of the 90th Birthday of Vladimir M. Zatsiorsky

Mark L. Latash

primarily in the field of biomechanics, and I performed studies of human motor control and movement disorders in neurological patients. Vladimir’s interest toward the field of the neural control of movement can be traced back to the mid-1960s when he met Nikolai Bernstein and also developed interactions

Full access

The Role of Imitation, Primitives, and Spatial Referent Coordinates in Motor Control: Implications for Writing and Reading

Shelia Guberman and Mark L. Latash

The main goal of this paper is to unite intuitive ideas, such as the imitation principle ( Bongard, 1970 ) and the idea of building blocks (primitives, reviewed in Latash, 2020b ) for complex skills, with the theory of the neural control of movement with spatial referent coordinates (RCs; reviewed

Open access

Methodological Advances in Motor Learning and Development

Keith R. Lohse

than another (e.g., I study motor behavior more than neural control of movement), but we should all appreciate the balance between different levels of analysis ( Poggio, 2012 ). As our research questions change, so to do our measures, methods, and theories. Neurophysiology is important, but psychology

Full access

Soccer Skill Performance and Retention Following an 8-Week Adapted Soccer Intervention in Adults With Disabilities

Danielle M. Lang, Emily E. Munn, Claire E. Tielke, Mary G. Nix Caden, Tessa M. Evans, and Melissa M. Pangelinan

et al., 2012 ). These age-related differences may be due, in part, to age-related changes in balance control, physical fitness, neuromuscular function, and neural control of movement ( Zapparoli et al., 2022 ), which play a large role in motor skill learning. Despite these concerns, we chose to

Free access

The History and Future of Neuromusculoskeletal Biomechanics

David G. Lloyd, Ilse Jonkers, Scott L. Delp, and Luca Modenese

-intensity tasks. 98 , 99 As we will see, the concept of motor units is now embedded in neuromusculoskeletal modeling. Studies of the neural control of movement have been enabled by electromyography (EMG). Supported by conceptual and mathematical models, 100 research showed that the orderly motor unit