[Eeglablist] Opinion on label of IC and its properties

[Cedric Cannard]

Hi Zaeem,

What are those big post-stimulus negative deflections in the plot showing all trials? Eye blinks? Movement? Those drops probably correspond to the high delta power. Otherwise, regarding beta frequencies, my guess would be that we are looking at a motor-related potential from a right-handed participant? Topo and dipole plots seem consistent with that. 

I don't think you should expect a 1/f distribution with ERP since you are looking at perturbed activity over a short time period. The 1/f distribution is more typical for longer segments of resting state data. 

I think it is safe to say this is a reliable brain component (except for the large drops that could be eye artifacts or large movements). 

Hope this helps,

Cedric




Cedric



On Sunday, May 5th, 2024 at 1:17 AM, Zaeem Hadi via eeglablist <eeglablist at sccn.ucsd.edu> wrote:

> Hi,
> I was wondering if someone could give an opinion on the below independent component.
> https://urldefense.com/v3/__https://drive.google.com/file/d/1Ovt0RlOg4DEKy-ky0QPj52xA12S_mB8n/view?usp=sharing__;!!Mih3wA!AyBVvMd2cdcJMLjE9wVI0Yv6x2XMQ5m8JIWCwxEbiGoBxKKeMqx-RnSBfc4EE60wau4i58jITZsMVznry58UbVk$
> 
> The ERP, ICLabel, and scalp topography seems to be indicating a brain component but the PSD has such high peaks at low and high betas with no 1/f trend.
> Given that there could be a very strong somatosensory component in some trials in the experiment, would it be safe to consider it a brain component?
> 
> Best wishes,
> Zaeem
> 
> 
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