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Related Concept Videos

Anatomical Movements00:51

Anatomical Movements

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Anatomical movements refer to the various actions or motions that can be performed by the body's joints and muscles. These movements are described using specific terms to provide a standardized way of discussing and understanding the range of motion at different joints.
Here are some common anatomical movements:
Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion. These movements take place at the shoulder, hip, elbow, knee, wrist,...
13.1K

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A Simple and Low-cost Assay for Measuring Ambulation in Mouse Models of Muscular Dystrophy
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Humans use minimum cost movements in a whole-body task.

Lijia Liu1, Dana Ballard2

  • 1Department of Computer Science, The University of Texas at Austin, Austin, TX, USA. lijialiu@utexas.edu.

Scientific Reports
|October 12, 2021
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Summary
This summary is machine-generated.

Human movements, like tracing curves, show consistent patterns across individuals. This study suggests these consistent movement strategies are chosen to minimize energy expenditure, optimizing human biomechanics.

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Area of Science:

  • Biomechanics
  • Human Movement Science
  • Robotics

Background:

  • Human musculoskeletal systems are complex, yet common movements exhibit stereotypical patterns.
  • Energetic cost is a significant factor in many human movements like walking and reaching.
  • Previous research indicated consistent posture sequences across subjects during whole-body curve tracing.

Purpose of the Study:

  • To investigate if humans select movement trajectories that minimize energetic cost.
  • To test the hypothesis that movement economy influences the choice of general human movements.
  • To explain the observed commonalities in posture sequences during arbitrary whole-body movements.

Main Methods:

  • Utilized a forty-eight degree of freedom human dynamic model.
  • Computed movement costs for nominal and perturbed tracing trajectories.
  • Compared energetic costs between different movement patterns using the dynamic model.

Main Results:

  • Perturbed tracings were found to be more energetically expensive than nominal tracings.
  • Movement cost analysis supported the hypothesis of minimum cost selection.
  • Data infers that original movement traces were chosen based on minimum energy expenditure.

Conclusions:

  • Human movement strategies, even for arbitrary tasks, appear to be optimized for energetic economy.
  • Minimum cost principles likely underlie the observed consistency in human movement patterns.
  • Understanding movement cost is crucial for explaining general human motor control and biomechanics.