[NEST Users] Re: STDP synapse t_spike and t_lastspike clarification

Dear Priyanka, You are right, t_spike is the time of the spike passing through the synapse now, t_lastspike the time of the previous spike passing through the synapse. These are the times at which spikes were emitted by the presynaptic neuron. For details on the algorithm, see the following paper, especially the appendix: Morrison, A., A. Aertsen, and M. Diesmann. “Spike-Time Dependent Plasticity in Balanced Recurrent Networks.” *Neural Computation* 19 (2007): 1437–67. For more complex third-factor learning rules, you may want to look at - Stapmanns J, Hahne J, Helias M, Bolten M, Diesmann M and Dahmen D (2021) *Event-Based Update of Synapses in Voltage-Based Learning Rules.* <https://urldefense.com/v3/__https://doi.org/10.3389/fninf.2021.609147__;!!K-Hz7m0Vt54!mizz2G768ZyxtG1XZlTSjxDr6s3T6RZDpWRFiCts21qHTuPl4kn04mGJ0d3dTELTSsCEnut6aP3uInQe5BIORxlBww$>Frontiers Media SA Frontiers in Neuroinformatics. 15:609147 doi <https://urldefense.com/v3/__http://dx.doi.org/10.3389/fninf.2021.609147__;!!K-Hz7m0Vt54!mizz2G768ZyxtG1XZlTSjxDr6s3T6RZDpWRFiCts21qHTuPl4kn04mGJ0d3dTELTSsCEnut6aP3uInQe5BKzElGGQg$> Best, Hans Ekkehard -- Prof. Dr. Hans Ekkehard Plesser Department of Data Science Faculty of Science and Technology Norwegian University of Life Sciences PO Box 5003, 1432 Aas, Norway Phone +47 6723 1560 Email hans.ekkehard.plesser(a)nmbu.no Home http://arken.nmbu.no/~plesser <https://urldefense.com/v3/__http://arken.nmbu.no/*plesser__;fg!!K-Hz7m0Vt54!mizz2G768ZyxtG1XZlTSjxDr6s3T6RZDpWRFiCts21qHTuPl4kn04mGJ0d3dTELTSsCEnut6aP3uInQe5BKz6tSIMQ$> *From: *prao2(a)uw.edu &lt;prao2(a)uw.edu&gt; *Date: *Friday, 5 January 2024 at 19:58 *To: *users(a)nest-simulator.org &lt;users(a)nest-simulator.org&gt; *Subject: *[NEST Users] STDP synapse t_spike and t_lastspike clarification [Some people who received this message don't often get email from prao2(a)uw.edu. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification <https://urldefense.com/v3/__https://aka.ms/LearnAboutSenderIdentification__;!!K-Hz7m0Vt54!mizz2G768ZyxtG1XZlTSjxDr6s3T6RZDpWRFiCts21qHTuPl4kn04mGJ0d3dTELTSsCEnut6aP3uInQe5BJSRBhbJA$> ] Dear all, I am trying to develop a new synapse model that uses the activity of the postsynaptic neuron. I'm looking at the STDP synapse to understand how it gets the target neuron history, and I wanted to clarify: are t_spike and t_lastspike the time stamps for the last spike of the presynaptic or postsynaptic neuron? I am looking at the send method of stdp_synapse.h ( https://github.com/nest/nest-simulator/blob/91a02ed98017224deabe25e8e08bcfd… <https://urldefense.com/v3/__https://github.com/nest/nest-simulator/blob/91a02ed98017224deabe25e8e08bcfdada51ff65/models/stdp_synapse.h__;!!K-Hz7m0Vt54!mizz2G768ZyxtG1XZlTSjxDr6s3T6RZDpWRFiCts21qHTuPl4kn04mGJ0d3dTELTSsCEnut6aP3uInQe5BI_VTJgfg$> ) Thanks in advance! Best, Priyanka Rao _______________________________________________ NEST Users mailing list -- users(a)nest-simulator.org To unsubscribe send an email to users-leave(a)nest-simulator.org _______________________________________________ NEST Users mailing list -- users(a)nest-simulator.org To unsubscribe send an email to users-leave(a)nest-simulator.org