Swollen feet are a common medical condition caused by a wide variety of underlying factors. The basic reason feet swell is that certain conditions cause fluids to congregate in the feet, which makes them puff up.
Your cerebrum makes up the bulk of your brain and has two parts, the left and right hemispheres. Both sides communicate with each other through the corpus callosum, a network of nerves. Each hemisphere of your brain controls the muscles and senses on the opposite side of your body. The left hemisphere is responsible for mental activities like logic, analysis, speech and language. Using the right side of your body stimulates the left-brain. Puzzles or games help sharpen the left side of your brain.
Nicotine also activates areas of the brain that are involved in producing feelings of pleasure and reward. Recently, scientists discovered that nicotine raises the levels of a neurotransmitter called dopamine in the parts of the brain that produce feelings of pleasure and reward.