In the House of Representatives it's by population size. In the senate it's always two
The 10 amendment states, "<span>The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people."
This is basically saying that anything that was not given to the federal government and not banned by the Constitution is a power of the states. thus increasing the power of the states</span>
<span>The mesolimbic pathway, located in the brain stem, is often referred to as the reward path. This area is located in the ventral tegmental area or VTA. Interestingly enough, this area generally deals with basic survival, but the ventral tegmental area projects to the nucleus accumbens (thought to be the reward center).</span>