Propagation of Action Potential

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jackyM
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Propagation of Action Potential

Post by jackyM » Tue Jun 07, 2011 9:15 am

Hello all..
I would like to know the propagation procedure of action potential in these 3 situations:

1) propagation within the cell
2) Propagation from cell to cell
3) Propagation from cellular actiosn to ECG

As far as i understood , the propagation within the cell is basically the normal mode of propagation of action potential in neurons with these 5 phases :({1)Resting Potential 2)Threshold 3)Rising Phase 4)Falling Phase 5)Recovery}
The currents flowing inwards at a point on the axon during an action potential spread out along the axon, and depolarize the adjacent sections of its membrane. If sufficiently strong, this depolarization provokes a similar action potential at the neighboring membrane patches. Is this propagation within the cell??

How does it propagate from one cell to another? and also to ECG??

Thanks for any help

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JackBean
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Post by JackBean » Tue Jun 07, 2011 1:53 pm

from cell to cell is the action potential propagated through synapses ;) you could know that :roll:
what is ECG?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.

jackyM
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Re: Propagation of Action Potential

Post by jackyM » Wed Jun 08, 2011 8:39 am

thnx for the reply... i was not sure abt synapses. thats y i asked.
ECG means Electro Cardiogram. I guess the propagation of cellular actionpotenial to ECG is same as Cardiac Action Potential.
http://en.wikipedia.org/wiki/Cardiac_action_potential

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JackBean
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Post by JackBean » Wed Jun 08, 2011 8:44 am

are we talking about neurons in 2), rigth?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.

jackyM
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Re: Propagation of Action Potential

Post by jackyM » Fri Jun 10, 2011 8:10 am

i was actully focussing on the action potential involving in the cardiac area i.e to find the relationship between cellular action potential and the electrical action as seen on the body surface, that is the ECG.

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Post by TATAbox » Mon Jul 25, 2011 6:23 pm

The action potential propagates from one myocyte to another through gap junctions. The electric currents produced by the exchange of ions through the cell membrane simply flow from one cell to the next through those junctions.

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JackBean
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Post by JackBean » Mon Aug 01, 2011 1:25 pm

OK, well then forget everything about the synapses
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.

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