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Inverted CFM Baseline


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Hi Everyone,

Is anyone from the forum able to throw some light on the possible rationale for a CFM trace that when the infant displayed subtle electrical seizure activity on the raw eeg the baseline dropped instead of displaying the classical uptick in the baseline? I have never encountered this phenomenon before. (all the probes were in the correct position and correctly connected to the monitor)

Thanks, stay safe

Kind regards


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This is a pattern I have not seen. As I understand (without knowing much!), epileptiform activity is an increase in voltage. But given that the aEEG trace is an summation of lots of neurons, if the seizure activity somehow would lead to a suppresion of surrounding activity, maybe the sum of it all would be a reduced voltage?


Did the neurophysiology dept come up with any explanation?

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