**Name:**

iaf_cond_exp_sfa_rr - Simple conductance based leaky integrate-and-fire

neuron model.

**Description:**

iaf_cond_exp_sfa_rr is an iaf_cond_exp_sfa_rr i.e. an implementation of a

spiking neuron using IAF dynamics with conductance-based synapses,

with additional spike-frequency adaptation and relative refractory

mechanisms as described in Dayan+Abbott, 2001, page 166.

As for the iaf_cond_exp_sfa_rr, Incoming spike events induce a post-synaptic

change of conductance modelled by an exponential function. The

exponential function is normalised such that an event of weight 1.0

results in a peak current of 1 nS.

Outgoing spike events induce a change of the adaptation and relative

refractory conductances by q_sfa and q_rr, respectively. Otherwise

these conductances decay exponentially with time constants tau_sfa

and tau_rr, respectively.

**Parameters:**

The following parameters can be set in the status dictionary.

V_m double - Membrane potential in mV

E_L double - Leak reversal potential in mV.

C_m double - Capacity of the membrane in pF

t_ref double - Duration of refractory period in ms.

V_th double - Spike threshold in mV.

V_reset double - Reset potential of the membrane in mV.

E_ex double - Excitatory reversal potential in mV.

E_in double - Inhibitory reversal potential in mV.

g_L double - Leak conductance in nS;

tau_syn_ex double - Time constant of the excitatory synaptic exponential

function in ms.

tau_syn_in double - Time constant of the inhibitory synaptic exponential

function in ms.

q_sfa double - Outgoing spike activated quantal spike-frequency adaptation

conductance increase in nS.

q_rr double - Outgoing spike activated quantal relative refractory

conductance increase in nS.

tau_sfa double - Time constant of spike-frequency adaptation in ms.

tau_rr double - Time constant of the relative refractory mechanism in ms.

E_sfa double - spike-frequency adaptation conductance reversal potential in

mV.

E_rr double - relative refractory mechanism conductance reversal potential

in mV.

I_e double - an external stimulus current in pA.

**Require:**

HAVE_GSL

**Receives:**

SpikeEvent, CurrentEvent, DataLoggingRequest

**Sends:**

SpikeEvent

**References:**

Meffin, H., Burkitt, A. N., & Grayden, D. B. (2004). An analytical

model for the large, fluctuating synaptic conductance state typical of

neocortical neurons in vivo. J. Comput. Neurosci., 16, 159-175.

Dayan, P. and Abbott, L. F. (2001). Theoretical Neuroscience, MIT Press (p166)

**Author:**

Sven Schrader, Eilif Muller

**SeeAlso:**

**Source:**

/home/nest/work/nest-2.14.0/models/iaf_cond_exp_sfa_rr.h