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.
Recent research has shown how nicotine acts on the brain. Nicotine activates the circuitry that regulates feelings of pleasure, the so-called reward pathways. Research has shown that nicotine increases the levels of dopamine (a key brain chemical involved in mediating the desire to consume drugs) in the reward circuits of the brain. Nicotine's pharmacokinetic properties have been found to enhance its abuse potential. Smoking cigarettes produces a rapid distribution of nicotine to the brain, with drug levels peaking within 10 seconds of inhalation.