# Command: testsuite::test_iaf_psp

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Name:

    testsuite::test_iaf_psp - sli script for test of iaf_neuron spike input

Synopsis:

    (test_iaf_psp) run -> compare response with reference data

Description:

      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.

      The expected output is documented and briefly commented at the end of
      the script.

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:  July 2004, Diesmann

SeeAlso:

- testsuite::test_iaf
- testsuite::test_iaf_dc_aligned_delay
- testsuite::test_spike_generator

Source:

    /opt/conda/conda-bld/nest_1531570948828/work/testsuite/unittests/test_iaf_psp.sli

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