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A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
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Related Experiment Video

Updated: Nov 10, 2025

MRI-guided Focused Ultrasound Thalamotomy for Patients with Medically-refractory Essential Tremor
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Tremors: A concept analysis.

Jessica A Cooley Coleman1,2, Sara M Sarasua1, Luigi Boccuto1

  • 1School of Nursing, Clemson University, Clemson, SC, USA.

Nursing Open
|April 2, 2021
PubMed
Summary

This study clarifies tremors, defining them as involuntary, rhythmic shaking motions that are part of a movement disorder. These tremors are always present but variable, and can sometimes be repressed.

Keywords:
MEF2CFragile X-associated tremor/ataxiaconcept analysistremor managementtremor measurementtremors

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Area of Science:

  • Neurology
  • Medical Concept Analysis

Background:

  • Tremors are a common neurological symptom.
  • A clear, operational definition of tremors is needed for consistent understanding and research.

Purpose of the Study:

  • To clarify and define the concept of tremors using a rigorous concept analysis method.

Main Methods:

  • Employed the Walker & Avant (2005) concept analysis method.
  • Conducted a comprehensive literature search across multiple databases (PubMed, CINAHL, etc.).
  • Assessed uses, definitions, categories, attributes, cases, antecedents, consequences, and empirical referents of tremors.

Main Results:

  • Identified key defining attributes of tremors: movement disorder, involuntary, oscillatory, rhythmic, non-painful, always present but variable, and sometimes repressible.
  • Established model cases, a borderline case, antecedents, consequences, and measurement tools related to tremors.

Conclusions:

  • An operational definition of tremors was established: a movement disorder with involuntary, rhythmic shaking motions.
  • This definition highlights that tremors are non-painful, consistently present though variable, and can be repressed by postural or rest changes.