decision making

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mumahuanhun
mumahuanhun's picture
decision making

Is there someone interested in this field? Would you like to say something about it ?

MUTHUMARIAPPAN ...
MUTHUMARIAPPAN Murugan's picture
Dear Mumahuanhun,

Dear Mumahuanhun,
 
Yes, i am very much interested in this field.
In Neuroscience perspective, the anterior cingulate cortex (ACC), orbitofrontal cortex (and the overlapping ventromedial prefrontal cortex) are brain regions involved in decision making processes. A recent neuroimaging study, found distinctive patterns of neural activation in these regions depending on whether decisions were made on the basis of personal volition or following directions from someone else. Patients with damage to the ventromedial prefrontal cortex have difficulty making decisions. A recent study involving Rhesus monkeys found that neurons in the parietal cortex not only represent the formation of a decision but also signal the degree of certainty (or "confidence") associated with the decision. Another recent study found that lesions to the ACC in the macaque resulted in impaired decision making in the long run of reinforcement guided tasks suggesting that the ACC is responsible for evaluating past reinforcement information and guiding future action. Emotion appears to aid the decision making process: Decision making often occurs in the face of uncertainty about whether one's choices will lead to benefit or harm. The somatic-marker hypothesis is a neurobiological theory of how decisions are made in the face of uncertain outcome. This theory holds that such decisions are aided by emotions, in the form of bodily states, that are elicited during the deliberation of future consequences and that mark different options for behavior as being advantageous or disadvantageous. This process involves an interplay between neural systems that elicit emotional/bodily states and neural systems that map these emotional/bodily states.
 
Here some articles about Neuroscience and Decision making.
http://www.psychwiki.com/wiki/Neuroscience_and_Decision_Making
http://www.triarchypress.co.uk/pages/articles/Neuroscience_and_Decision_Making.pdf
http://koso.ucsd.edu/~martin/ErnstPaulus2005.pdf
 

Arvind Singh Pundir
Arvind Singh Pundir's picture
Decision making is an  mental

Decision making is an  mental process which leads to the selection of choice in the form of a satisfactory solution with the help of certain assumptions , it can be regarded as a cognitive process which varies from individual to individual
a nice article in Science "Representation of Confidence Associated with a Decision by Neurons in the Parietal Cortex" www.sciencemag.org/cgi/content/full/324/5928/759
Introduction to Decision Making :   www.virtualsalt.com/crebook5.htm

mumahuanhun
mumahuanhun's picture
Thank you very much,

Thank you very much, muthuonco, and is decision making if followed by choice?
Can we say that choice is a kind of motor?
I am freshman. And many questions in this field puzzle me.

mumahuanhun
mumahuanhun's picture
Thank you very much, pundir.

Thank you very much, pundir. I would like to read this paper.

dustproduction
dustproduction's picture
 Decision making as a term is

 Decision making as a term is a little vague, because it asks the question "who is making the choices?" Rebecce Saxe, MIT, has shows that the pre-frontal cortex is filled with inhibitors that limit choices from moment to moment.  So the brain in this way is continually pre-selecting for us.  There is also research that shows that the brain can react to a choice before the mind is aware of the choice.  Dan Ariely, Behavior Economics MIT. has showed that when we are faced with difficult choices, such as deciding whether to be an organ donor or not, we are inclined to not make a choice.  This was shown to be the case when people at the Motor Vehicle Department where asked to make a decision about whether to be an organ donor or not.  What was discovered was that if you asked people to check the box if the want to be a donor, they do not check the box. But if the rephrase the question in such a way so that people who do not want to be donors need to check the box, again people do not check the box.  His book, "Predictably Irrational" gives  series of examples that demonstrate how poorly we make choices for ourselves. Saxe's work also shows that if the decision involves a moral judgement about others, we employ a part of the brain call the right temporo parietal junction, RTPJ for short.  This is the part of the brain that allows us to know understand to thoughts ideas and beliefs of others. We might say of others action, "I would never do that, act in such a way."  But again, research, such as the Stanley Millgram experiments,  shows that 65% of us would indeed act in a similar manner in those situations.  So part of us that would judge others seems to be unaware of how we will decide to act in the same situations.  "Who" is making the decisions?      

Cifuentes
Cifuentes's picture
Hello everyone!

Hello everyone!
I'm a neuroscience student and I'm analyzing a paper on motivation in decision making and I have some fMRI images that I can't quite understand. Actually I don't understand why do we get a signal after stimuli in only one hemisphere of the brain? I thought it was because of the technique but since we are studding bilateral regions I thought both sides should be activated. Is it because of the type of machine used?

I put here the link to the paper:
http://www.google.fr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CD0QFjAB&url=http%3A%2F%2Fwww.pnas.org%2Fcontent%2F106%2F2%2F617.full.pdf&ei=3h9pT4m2BYnP0QWVndyYCQ&usg=AFQjCNEtquZAbG1EC2iyD8Zon3U5aQK38w&sig2=-xxoJSxdK9gLREibpicBag

I've spend an entire day looking for the answer and it must be something really simple, please can anyone illuminate me :) ?
Thank you very very much in advance!