Units of Time in Virtual Brain Simulations

[canthony....@gmail.com]

Hi all,

I am currently helping a collaborator with a project involving TVB and the epileptor model, and units of time are highly relevant to the problem we are trying to address.

In the epileptor demo below, the x-axis for the plots is in milliseconds. However, some of the seizures are occurring cyclically within the same channels with as little as 20 seconds apart in time.

https://nbviewer.thevirtualbrain.org/url/docs.thevirtualbrain.org/demos/exploring_resting_state_in_epilepsy.ipynb

Given that and recognizing that this may be a silly question, are the units of time in the TVB and the epileptor arbitrary (and you just have to slow the cyclical nature of the model down to an appropriate rate), or do the units of time actually indicate time in seconds?

Thank you,

Charles Ellis

[WOODMAN Michael]

Hi

In the various epileptor papers, it is suggested the model's characteristic time scale is much faster than realistic seizure durations.  In TVB, there is a parameter "tt" which can be set to slow the model down, and the dt for the integration can be scaled up proportionally. 

cheers,

Marmaduke

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From: tvb-...@googlegroups.com <tvb-...@googlegroups.com> on behalf of canthony....@gmail.com <canthony....@gmail.com>
Sent: Wednesday, April 28, 2021 9:19:27 PM
To: TVB Users
Subject: [TVB] Units of Time in Virtual Brain Simulations

 

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