DEFAULT_TRACE_MODEL * SpikingGroup::get_post_trace( AurynFloat x ) { for ( NeuronID i = 0 ; i < posttraces.size() ; i++ ) { if ( posttraces[i]->get_tau() == x ) { stringstream oss; oss << get_name() << ":: Sharing post trace with " << x << "s timeconstant." ; logger->msg(oss.str(),DEBUG); return posttraces[i]; } } DEFAULT_TRACE_MODEL * tmp = new DEFAULT_TRACE_MODEL(get_post_size(),x); posttraces.push_back(tmp); return tmp; }
void IF2Group::integrate_nonlinear_nmda_synapses() { // decay of ampa and gaba channel, i.e. multiply by exp(-dt/tau) auryn_vector_float_scale(scale_ampa,g_ampa); auryn_vector_float_scale(scale_gaba,g_gaba); // compute dg_nmda = (g_ampa-g_nmda)*dt/tau_nmda and add to g_nmda AurynFloat mul_nmda = dt/tau_nmda; auryn_vector_float_saxpy(mul_nmda,g_ampa,g_nmda); auryn_vector_float_saxpy(-mul_nmda,g_nmda,g_nmda); // BEGIN implement NMDA voltage dependence auryn_vector_float_copy( mem, nmda_opening); auryn_vector_float_add_constant( nmda_opening , -e_nmda_onset ); auryn_vector_float_scale( nmda_slope, nmda_opening ); for ( AurynState * ptr = auryn_vector_float_ptr( nmda_opening , 0 ) ; ptr != auryn_vector_float_ptr( nmda_opening , get_post_size()-1 )+1 ; ++ptr ) { AurynFloat x = *ptr; AurynFloat x2 = x*x; AurynFloat r = x2/(1.0+x2); if (x>0) *ptr = r; // rectification else *ptr = 0; // cout << *ptr << endl; } // END implement NMDA voltage dependence // excitatory auryn_vector_float_copy(g_nmda,t_exc); auryn_vector_float_scale(-A_nmda,t_exc); auryn_vector_float_mul(t_exc,nmda_opening); auryn_vector_float_saxpy(-A_ampa,g_ampa,t_exc); auryn_vector_float_mul(t_exc,mem); // inhibitory auryn_vector_float_copy(mem,t_inh); auryn_vector_float_add_constant(t_inh,-e_rev); auryn_vector_float_mul(t_inh,g_gaba); }