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[Neuroscience] Re: Brain impedance

aeneurofisiologia from gmail.com via neur-sci%40net.bio.net (by aeneurofisiologia from gmail.com)
Tue Jun 19 08:15:07 EST 2007


<Ana.Cervera-Fe... from uv.es> escreveu:
> Hi all,
>
> I want to stimulate through bipolar teflon-coated steel electrodes in
> the tegmentum in rats with pulses of 50-500 uA. I need to know which is
> the average brain impedance in vivo to calculate the voltage needed. I
> suppose that the contribution of the electrode impedance is low but if I
> have to take it into account any advise is welcome.
> Thank you in advance!
>
> Ana

Hi am a student of neurophysiology, I'm Portuguese and I will respond
to you in Spanish.
la impedansia es una ressistensia que varia com el tiempo, tiens
varios problemas el primero es que es mui variable de ser vivo para
ser vivo y es distinto em um ser vivo mediante la estructura e el
momento em que asses la medicion de la impedancia.
bueno lo que te aconserro es que agas lo siguente la maioria de los
aparatos de EEG o EMG tienes lector de inpedancia de esse modo puedes
seber la impedancia de la estructura que queres estimular em un
momento dado, normalmente la enpedansia dada por la maquina ja tiene
em cuenta la ressistensia del electrodo porque este no esbariable.

Buena suerte e espero tenerte ajudado



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