//Created by libAntimony v2.4
model butera_1999__environment(time_)

  // Variable initializations:
  time_ = ;
end

model butera_1999__membrane(V, time_, i_NaP, i_Na, i_K, i_KS, i_L, i_tonic_e)

  // Rate Rules:
  V' = (-(i_NaP + i_KS + i_Na + i_K + i_L + i_tonic_e) + i_app) / C;

  // Variable initializations:
  V = -55.0;
  C = 21.0;
  i_app = 0.0;
  time_ = ;
  i_NaP = ;
  i_Na = ;
  i_K = ;
  i_KS = ;
  i_L = ;
  i_tonic_e = ;
end

model butera_1999__fast_sodium_current_m_gate(m_infinity, V)

  // Assignment Rules:
  m_infinity := 1.0 / (1.0 + exp((V - theta_m) / sigma_m));

  // Variable initializations:
  theta_m = -34.0;
  sigma_m = -5.0;
  V = ;
end

model butera_1999__fast_sodium_current_n_gate(n, V, time_)

  // Assignment Rules:
  n_infinity := 1.0 / (1.0 + exp((V - theta_n) / sigma_n));
  tau_n := tau_n_max / cosh((V - theta_n) / (2.0 * sigma_n));

  // Rate Rules:
  n' = (n_infinity - n) / tau_n;

  // Variable initializations:
  n = 0.01;
  tau_n_max = 10.0;
  theta_n = -29.0;
  sigma_n = -4.0;
  V = ;
  time_ = ;
end

model butera_1999__fast_sodium_current(i_Na, E_Na, time_, V, m_infinity, n)

  // Sub-modules, and any changes to those submodules:
  fast_sodium_current_m_gate: butera_1999__fast_sodium_current_m_gate(m_infinity, V);
  fast_sodium_current_n_gate: butera_1999__fast_sodium_current_n_gate(n, V, time_);

  // Assignment Rules:
  i_Na := g_Na * power(m_infinity, 3.0) * (1.0 - n) * (V - E_Na);

  // Variable initializations:
  E_Na = 50.0;
  g_Na = 28.0;
end

model butera_1999__potassium_current_n_gate(n, V, time_)

  // Assignment Rules:
  n_infinity := 1.0 / (1.0 + exp((V - theta_n) / sigma_n));
  tau_n := tau_n_max / cosh((V - theta_n) / (2.0 * sigma_n));

  // Rate Rules:
  n' = (n_infinity - n) / tau_n;

  // Variable initializations:
  n = 0.01;
  tau_n_max = 10.0;
  theta_n = -29.0;
  sigma_n = -4.0;
  V = ;
  time_ = ;
end

model butera_1999__potassium_current(i_K, E_K, time_, V, n)

  // Sub-modules, and any changes to those submodules:
  potassium_current_n_gate: butera_1999__potassium_current_n_gate(n, V, time_);

  // Assignment Rules:
  i_K := g_K * power(n, 4.0) * (V - E_K);

  // Variable initializations:
  E_K = -85.0;
  g_K = 11.2;
end

model butera_1999__slow_potassium_current_k_gate(k, V, time_)

  // Assignment Rules:
  k_infinity := 1.0 / (1.0 + exp((V - theta_k) / sigma_k));
  tau_k := tau_k_max / cosh((V - theta_k) / (2.0 * sigma_k));

  // Rate Rules:
  k' = (k_infinity - k) / tau_k;

  // Variable initializations:
  k = 0.22;
  tau_k_max = 10000.0;
  theta_k = -38.0;
  sigma_k = -6.0;
  V = ;
  time_ = ;
end

model butera_1999__slow_potassium_current(i_KS, E_K, time_, V, k)

  // Sub-modules, and any changes to those submodules:
  slow_potassium_current_k_gate: butera_1999__slow_potassium_current_k_gate(k, V, time_);

  // Assignment Rules:
  i_KS := g_KS * k * (V - E_K);

  // Variable initializations:
  g_KS = 5.6;
  E_K = ;
end

model butera_1999__persistent_sodium_current_m_gate(m_infinity, V)

  // Assignment Rules:
  m_infinity := 1.0 / (1.0 + exp((V - theta_m) / sigma_m));

  // Variable initializations:
  theta_m = -40.0;
  sigma_m = -6.0;
  V = ;
end

model butera_1999__persistent_sodium_current(i_NaP, time_, V, E_Na, m_infinity)

  // Sub-modules, and any changes to those submodules:
  persistent_sodium_current_m_gate: butera_1999__persistent_sodium_current_m_gate(m_infinity, V);

  // Assignment Rules:
  i_NaP := g_NaP * m_infinity * (V - E_Na);

  // Variable initializations:
  g_NaP = 2.8;
  time_ = ;
  E_Na = ;
end

model butera_1999__leakage_current(i_L, V)

  // Assignment Rules:
  i_L := g_L * (V - E_L);

  // Variable initializations:
  g_L = 2.8;
  E_L = -50.0;
  V = ;
end

model butera_1999__tonic_current(i_tonic_e, V)

  // Assignment Rules:
  i_tonic_e := g_tonic_e * (V - E_syn_e);

  // Variable initializations:
  g_tonic_e = 0.0;
  E_syn_e = 0.0;
  V = ;
end

model *butera_1999____main()

  // Sub-modules, and any changes to those submodules:
  environment: butera_1999__environment(time_);
  membrane: butera_1999__membrane(V, time_, i_NaP, i_Na, i_K, i_KS, i_L, i_tonic_e);
  fast_sodium_current: butera_1999__fast_sodium_current(i_Na, E_Na, time_, V, m_infinity, n);
  potassium_current: butera_1999__potassium_current(i_K, E_K, time_, V, n0);
  slow_potassium_current: butera_1999__slow_potassium_current(i_KS, E_K, time_, V, k);
  persistent_sodium_current: butera_1999__persistent_sodium_current(i_NaP, time_, V, E_Na, m_infinity0);
  leakage_current: butera_1999__leakage_current(i_L, V);
  tonic_current: butera_1999__tonic_current(i_tonic_e, V);
end