# Delay Plasticity Only Working in One Direction

**URL:** <https://brian.discourse.group/t/delay-plasticity-only-working-in-one-direction/1301>\
**Category:** Support\
**Tags:** synapses, plasticity, delays\
**Created:** [15 October 2024 18:06 UTC](https://brian.discourse.group/t/delay-plasticity-only-working-in-one-direction/1301 "2024-10-15T18:06:55Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![mstimberg](https://yyz2.discourse-cdn.com/free1/user_avatar/brian.discourse.group/mstimberg/32/11_2.png) [@mstimberg](https://brian.discourse.group/u/mstimberg)\
**Post date:** [17 October 2024 14:14 UTC](https://brian.discourse.group/t/delay-plasticity-only-working-in-one-direction/1301/4 "2024-10-17T14:14:47Z")

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Ah, yes, if you are already doing multiple runs, then it will take the changed delay variable value at the end of a run and turn it into the actual simulation delays for the following run.  
Please note that this behaviour might change with future Brian versions, though : we might raise an error (because the delay is supposed to be constant), or actually take into account delay changes during the run.

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_[View the full topic](https://brian.discourse.group/t/delay-plasticity-only-working-in-one-direction/1301)._