How does thinking create action potentials?

  • Context: Medical 
  • Thread starter Thread starter sameeralord
  • Start date Start date
  • Tags Tags
    Potentials Thinking
Click For Summary

Discussion Overview

The discussion centers around the question of how the brain initiates action potentials in the context of voluntary actions, specifically when deciding to pick up a pen. It explores the relationship between sensory input, decision-making, and the concept of free will, touching on both theoretical and conceptual aspects.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants suggest that the decision to pick up a pen involves recognizing a need and making a decision, which activates brain regions like the frontal lobe.
  • Others question whether such decisions are truly voluntary or merely responses to prior stimuli, indicating a lack of certainty about the nature of free will in decision-making.
  • A participant references a case study involving a patient with a severed corpus callosum to illustrate how the brain can create rationalizations for actions that may not be consciously initiated.
  • One participant provides a simplified explanation of the process, stating that sensory information is gathered and signals are sent to motor neurons to execute the action.
  • Another participant emphasizes the philosophical aspect of the question, noting that the origin of purely volitional acts is still a matter of debate, with neuroscientists generally viewing brain states as dependent on prior states.

Areas of Agreement / Disagreement

Participants express differing views on whether decisions are purely volitional or responses to stimuli, indicating that the discussion remains unresolved with multiple competing perspectives.

Contextual Notes

The discussion touches on complex concepts such as free will and the dependence of brain states on prior states, which may involve missing assumptions and unresolved philosophical implications.

sameeralord
Messages
659
Reaction score
3
Hello guys,

I don't know much about brain and stuff I only know a bit about action potential. My question is I can understand how sensory nerves by a stimulus, but let's say I want to pick a pen. How does brain initiate the action potential for that? This might have been dicussed before but I'm not sure what to type in google to find the answer. Thanks :smile:
 
Biology news on Phys.org
sameeralord said:
Hello guys,

I don't know much about brain and stuff I only know a bit about action potential. My question is I can understand how sensory nerves by a stimulus, but let's say I want to pick a pen. How does brain initiate the action potential for that? This might have been dicussed before but I'm not sure what to type in google to find the answer. Thanks :smile:

You first recognize the need for an implement to write with... a decision must be made, which causes diffuse activity, but especially in the frontal lobe. You're still reacting to stimulus, at whatever remove.

If you remove all external stimulus from a person, their mind will begin to create "phantoms" to fill the void. In the proper context, this is often an aspect of torture, although great care is taken because it is too easy to induce serious panic or even dissociation or dissociative fugue. That of course, makes information gleaned worthless.

Now, if you enter a sensory deprivation 'tank', and you know you can leave it at any time.. some people find that same experience relaxing. Inevitably however, our brains provide stimulus in the absence of any external source. We are ALWAYS 'on'.
 
sameeralord said:
Hello guys,

I don't know much about brain and stuff I only know a bit about action potential. My question is I can understand how sensory nerves by a stimulus, but let's say I want to pick a pen. How does brain initiate the action potential for that? This might have been dicussed before but I'm not sure what to type in google to find the answer. Thanks :smile:
How can you be sure the decision to pick up the pen isn't a response to a stimulus?
 
Pythagorean said:
How can you be sure the decision to pick up the pen isn't a response to a stimulus?

Of course, you can't be.

Nature 2009 said:
...He cites the
example of a patient whose corpus callosum
had been severed as a treatment for epilepsy,
making it impossible for one side of the brain
to communicate with the other. Gazzaniga and
his colleagues presented the word ‘walk’ to the
patient’s left visual field, which corresponds to
the right side of the brain. When the patient
stood up and began walking, they asked him
why; the right side of the patient’s brain had
been shown to lack the ability to process language.
His left brain, which never received the
walk command, but which handles language
processing, quickly invented a logical explanation:
“I wanted to go get a Coke.”
Analogous effects have been found

http://hd.media.mit.edu/01.29.09_naturemag_secsig.pdf <-- Above quote.

Really, there you have it.
 
You decide to pick up a pen through various cascade pathways, you gather sensory information via afferent neurons, see pen, then your brain will send signals to your motor neurons, causing you to pick up the pen. Very very brief explanation, if you want more detail check out: http://wps.aw.com/bc_marieb_ehap_8/25/6527/1670985.cw/index.html
 
Last edited by a moderator:
sameeralord said:
Hello guys,

I don't know much about brain and stuff I only know a bit about action potential. My question is I can understand how sensory nerves by a stimulus, but let's say I want to pick a pen. How does brain initiate the action potential for that? This might have been dicussed before but I'm not sure what to type in google to find the answer. Thanks :smile:

What you are asking, I think, is how a purely volitional act originates in the brain; not as a direct response to some immediate or recent stimulus coming from the sensory input. This might be called "free will"; the idea that you can just decide to do something that is not effectively predetermined in some way. You'll find a lot of discussions about that, but no good answers. The fact is, no one knows. Neuroscientists however generally take the view that brain states are fully dependent on prior brain states (which take into account all sensory input) and there really is no such thing as 'free will'.
 
Last edited:

Similar threads

  • · Replies 8 ·
Replies
8
Views
2K
Replies
6
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
Replies
8
Views
2K
  • · Replies 4 ·
Replies
4
Views
4K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
10K
  • · Replies 3 ·
Replies
3
Views
6K
Replies
24
Views
4K
  • · Replies 10 ·
Replies
10
Views
3K