Why IQ level is decreasing if a person has financial problems?

Why IQ level is decreasing if a person has financial problems?

We have only a limited number of neurons 

The researchers of the University of Helsinki have noticed that the IQ level would decrease if a person has financial problems. Why the human intelligence level would decrease, while the person thinks something negative? The answer to that question is very simple and it's that worries are taking the brain capacity to other things, and there is a very good reason. Our level of intelligence depends on the number of neurons and their connections, and in the human brains is a huge number of those things.

But the thing is that brains still have limited numbers of neurons and connections, and each neuron and connection of the neuron would make only one thing per time. And this means that if the person has worries some neurons are reserved for handling those things like lack of money, and that means that person, who have worries have fewer neurons for handling other problems. That thing would be highlighted in the cases, where an inmate has got financial problems.

Financial problems cause lack of concentration

That means the person would get too little sleep, and that makes that inmate tired, what would cause concentration problems, and if a person is tired, the IQ tests would be more difficult than without problems. The higher stress level would also cause problems with concentration, and things like anger and fights at home and with friends would cause problems with IQ and other tests, where the concentration have the key role.

That means that the person, who has problems would have less successful results in the IQ tests, than the person, who has not those problems, what causes social pressure and also behavior under the stress can change and that would make a negative impression to other people. And that could cause that some people start to think that person less intelligent than this inmate even be.