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Pharmacodynamic Models: Link Model and Systems Pharmacodynamic Model01:14

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The link model is a fundamental pharmacokinetic-pharmacodynamic (PK–PD) approach to account for delayed drug responses when the observed effect does not immediately correlate with the drug's plasma concentration peak. This delay is mathematically addressed by introducing an effect compartment concentration, Ce, which is kinetically linked to the plasma concentration, Cp, via a first-order rate constant, ke0. The linkage allows for a more accurate prediction of drug effects over time. A higher...
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A Conflict Model of Reward-seeking Behavior in Male Rats
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A systemic model of doping behavior.

Michael B Johnson1

  • 1Department of Psychology, University of Tennessee at Chattanooga, TN 37403, USA. michael-johnson01@utc.edu

The American Journal of Psychology
|August 13, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces a systemic model to understand doping behavior in sports and academics. It integrates historical, environmental, genetic, and social factors to explain why doping persists despite risks and regulations.

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Area of Science:

  • Sports Science
  • Behavioral Science
  • Genetics

Background:

  • Doping is a prevalent performance-enhancing behavior in athletics and academics.
  • Concerns include negative health effects and fairness issues.
  • Existing understanding of doping behavior is limited.

Purpose of the Study:

  • To propose a comprehensive systemic model of doping behavior.
  • To integrate various factors influencing doping.
  • To provide a theoretical framework for understanding contemporary doping.

Main Methods:

  • Conceptual model development.
  • Literature review of relevant empiricism.
  • Integration of historical, environmental, genetic, social, and epigenetic factors.

Main Results:

  • A systemic model is proposed, viewing doping as a function of complex interactions.
  • The model accounts for historical practices, current environment, and interventions.
  • Individual factors like genetics and epigenetics are included.

Conclusions:

  • The proposed model offers a holistic understanding of doping behavior.
  • It highlights the interplay of multiple systemic factors.
  • This framework can inform future research and anti-doping strategies.