indii/fmri/hemodynamic/NeuralBalloonModelDefaults.hpp

#ifndef INDII_FMRI_HEMODYNAMIC_NEURALBALLOONMODELDEFAULTS_HPP
#define INDII_FMRI_HEMODYNAMIC_NEURALBALLOONMODELDEFAULTS_HPP

#include "indii/ml/ode/FunctionStatic.hpp"

namespace indii {
  namespace fmri {
    namespace hemodynamic {

/**
 * Default biophysical parameter and function settings for
 * NeuralBalloonModel. These are based on values given in @ref
 * Friston2003 "Friston et al. (2003)".
 *
 * @author Lawrence Murray <lawrence@indii.org>
 * @version $Rev: 285 $
 * @date $Date: 2007-07-20 17:25:40 +0100 (Fri, 20 Jul 2007) $
 */
class NeuralBalloonModelDefaults {
public:
  /**
   * \f$\epsilon\f$; efficacy with which %neural activity causes an
   * increase in signal.
   */
  static const double EPSILON;

  /**
   * \f$\tau_s\f$; time constant for signal decay. Note that \f$\tau_s\f$ in
   * Friston et al. (2000) equals \f$\frac{1}{\kappa}\f$ in Friston et
   * al. (2003).
   */
  static const double TAU_S;

  /**
   * \f$\tau_f\f$; time constant for autoregulatory feedback from blood
   * flow. Note that \f$\tau_f\f$ in Friston et al. (2000) equals
   * \f$\frac{1}{\gamma}\f$ in Friston et al. (2003).
   */
  static const double TAU_F;

  /**
   * \f$u(t) = 0.0\f$; %neural activity.
   */
  static indii::ml::ode::f_t U;

  /**
   * \f$f_{in}(t) = f\f$; enforced equivalence in NeuralBalloonModel.
   */
  static indii::ml::ode::f_t F_IN;

  /**
   * \f$\frac{df}{dt} = s\f$; differential equation.
   */
  static indii::ml::ode::f_t DFDT;

  /**
   * \f$\frac{ds}{dt} = \epsilon u(t) - \frac{s}{\tau_s} -
   *   \frac{(f-1)}{\tau_f}\f$; differential equation.
   */
  static indii::ml::ode::f_t DSDT;

};

    }
  }
}

#endif

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