# Command: testsuite::test_iaf_ps_psp_accuracy

NEST HelpDesk | Command Index | NEST Quick Reference

Name:

    testsuite::test_iaf_ps_psp_accuracy - test of iaf_neuron accuracy of PSP

Synopsis:

    (test_iaf_ps_psp_accuracy) run -> compare one voltage with analytics

Description:

      code updated for NEST 2 but not yet this comment

      test_iaf_psp.sli checks the voltage response of the iaf_neuron
      model neuron to a single incoming spike. The voltage excursion is
      called post-synaptic potential (PSP). In the iaf_neuron model neuron
      the post-synaptic current is described by an alpha-function
      (see [1] and references therein). The resulting PSP has a finite
      rise-time, with voltage and current beeing zero in the initial
      condition (see [1]).

      The dynamics is tested by connecting a device that emits spikes
      at individually configurable times (see test_spike_generator) to
      a model neuron.

      The weight of the connection specifies the peak value (amplitude)
      of the post-synaptic current (PSC) in pA.

      The subthreshold dynamics of the iaf_neuron is integrated exactly.
      Therefore, it is suitable to check whether the simulation kernel
      produces results independent of the computation step size
      (resolution).

      In order to obtain identical results for different computation
      step sizes h, the SLI script needs to be independent of h.
      This is achieved by specifying all time parameters in milliseconds
      (ms). In particular the time of spike emission and the synaptic
      delay need to be integer multiples of the computation step sizes
      to be tested. test_iaf_dc_aligned_delay demonstrates the strategy
      for the case of DC current input.

References:

      [1] Rotter S & Diesmann M (1999) Exact simulation of time-invariant linear
      systems with applications to neuronal modeling. Biologial Cybernetics
      81:381-402.

      Author:  May 2005, February 2008, Diesmann

SeeAlso:

- testsuite::test_iaf_psp
- testsuite::test_iaf_ps_dc_accuracy

Source:

    /opt/conda/conda-bld/nest_1524088722951/work/nest-2.14.0/testsuite/unittests/test_iaf_ps_psp_accuracy.sli

NEST HelpDesk | Command Index | NEST Quick Reference

© 2004 The NEST Initiative