- #1
nobahar
- 497
- 2
Hello!
Peculiar question. I was hoping that someone, probably with a background in development or neuroscience, could answer this question for me:
The contraction of heart muscles is achievable independently of any 'outside' source because the heart muscles can initiate action potentials themselves.
I could not find anything on any specialised neurons having a similar property, so how is the CNS 'kickstarted'? Action potentials arise in neurons by depolarisation induced by other neurons. So how is the first action potential in the newly developed/developing CNS achieved?
Does it require interaction with the outside environment?, which could generate action potentials that are relayed to the CNS, and from there the signal is simply 'maintained'?
I assume that the brain is always 'on' from the point forward of the first action potential.
As an analogy: If the cardiac myocytes were not able to initiate action potentials independently, it would require an outside source, it could then have some mechanism for maintaining a controlled contraction. This is not of course the case, since the heart is myogenic.; but since neurons do not appear to have this property to initiate action potentials independently, then there must be something to initiate the first action potential, action potentials could then be maintained within the CNS, I suppose.
Does the question make sense?
Admittedly it's a little peculiar!
Thanks in advance.
Peculiar question. I was hoping that someone, probably with a background in development or neuroscience, could answer this question for me:
The contraction of heart muscles is achievable independently of any 'outside' source because the heart muscles can initiate action potentials themselves.
I could not find anything on any specialised neurons having a similar property, so how is the CNS 'kickstarted'? Action potentials arise in neurons by depolarisation induced by other neurons. So how is the first action potential in the newly developed/developing CNS achieved?
Does it require interaction with the outside environment?, which could generate action potentials that are relayed to the CNS, and from there the signal is simply 'maintained'?
I assume that the brain is always 'on' from the point forward of the first action potential.
As an analogy: If the cardiac myocytes were not able to initiate action potentials independently, it would require an outside source, it could then have some mechanism for maintaining a controlled contraction. This is not of course the case, since the heart is myogenic.; but since neurons do not appear to have this property to initiate action potentials independently, then there must be something to initiate the first action potential, action potentials could then be maintained within the CNS, I suppose.
Does the question make sense?
Admittedly it's a little peculiar!
Thanks in advance.