Reward modulated STDP (Legenstein et al. 2008)

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Accession:116837
"... This article provides tools for an analytic treatment of reward-modulated STDP, which allows us to predict under which conditions reward-modulated STDP will achieve a desired learning effect. These analytical results imply that neurons can learn through reward-modulated STDP to classify not only spatial but also temporal firing patterns of presynaptic neurons. They also can learn to respond to specific presynaptic firing patterns with particular spike patterns. Finally, the resulting learning theory predicts that even difficult credit-assignment problems, where it is very hard to tell which synaptic weights should be modified in order to increase the global reward for the system, can be solved in a self-organizing manner through reward-modulated STDP. This yields an explanation for a fundamental experimental result on biofeedback in monkeys by Fetz and Baker. In this experiment monkeys were rewarded for increasing the firing rate of a particular neuron in the cortex and were able to solve this extremely difficult credit assignment problem. ... In addition our model demonstrates that reward-modulated STDP can be applied to all synapses in a large recurrent neural network without endangering the stability of the network dynamics."
Reference:
1 . Legenstein R, Pecevski D, Maass W (2008) A learning theory for reward-modulated spike-timing-dependent plasticity with application to biofeedback. PLoS Comput Biol 4:e1000180 [PubMed]
Model Information (Click on a link to find other models with that property)
Model Type: Realistic Network;
Brain Region(s)/Organism: Neocortex;
Cell Type(s):
Channel(s):
Gap Junctions:
Receptor(s):
Gene(s):
Transmitter(s):
Simulation Environment: Python; PCSIM;
Model Concept(s): Pattern Recognition; Spatio-temporal Activity Patterns; Reinforcement Learning; STDP; Biofeedback; Reward-modulated STDP;
Implementer(s):
new value  spikeTemplatesSeed 5958
new value  ipcontroller_host cluster1
new value  runMode short
new value  nTrainEpochs 2000
new value  nTestEpochs 50
new value  numpyRandomSeed 354093825
new value  numRepetitionsTest 10
Traceback (most recent call last):
  File "SpeechRewardSTDPExperiment.py", line 404, in ?
    exper.run("long_input")
  File "/home/mammoth/dejan/pcsim/pypcsimplus/Experiment.py", line 28, in run
    self.setup()        
  File "/home/mammoth/dejan/pcsim/pypcsimplus/Experiment.py", line 54, in setup
    self.setupModels()                
  File "SpeechRewardSTDPExperiment.py", line 132, in setupModels
    rc = self.prepareCluster()
  File "SpeechRewardSTDPExperiment.py", line 97, in prepareCluster
    self.IPcluster = Cluster(ClusterConfig(configFile= './clusterconf.py', controller=IPcontroller))
  File "/home/mammoth/dejan/simtools/pyV1/cluster/cluster.py", line 104, in __init__
    execfile(configFile,self)
  File "./clusterconf.py", line 55, in ?
    sshx = os.environ['RMSTDP_HOME'] + '/packages/sshx'
  File "/usr/lib64/python2.4/UserDict.py", line 17, in __getitem__
    def __getitem__(self, key): return self.data[key]
KeyError: 'RMSTDP_HOME'

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