IUBio

questions about recording of action potential

JENNY LIU jennyliu at xtra.co.nz
Sat May 1 01:53:14 EST 1999


Could someone help me with these questions please:
1. Why action potentials recorded with 2 extracellular electrodes from
a    single nerve fibre or whole nerve are usually biphasic? I was   
thinking that is a recording artifact due to the 2 elctrodes,is it   
right?
2. What are the advantages in using square-waves electrical stimuli
ocer    other types of stimuli(eg. sinusoidal) for excitation of nerves
or    muscle?
3. Why the threshold for nerve or muscle excitation witha square wave 
   electrical stimulus depends both on the amplitude and duration of
the    stimulus? 
Thanks

Jenny



More information about the Neur-sci mailing list

Send comments to us at biosci-help [At] net.bio.net