he brain is the most complex part of the human body. It is the center of intelligence, interprets senses, controls behavior, and initiates body movement. The adult human brain weighs about three pounds is composed of one hundred billion to one trillion neurons. Neurons are specialized cells that use electrical signals to transmit information to other nerve cells, glands, or muscle cells. It is the primary functional unit of the brain. All movement, thoughts, senses, memories, and feelings are the result of signals that pass through these neurons. Attached to the neuron are short, finger-like protuberances called dendrites. Messages are passed from neuron to neuron through the dendrites. Scientists now believe that the brain is able to grow new dendrites and neurons. This is the basis of the Brain Fitness exercises, which were tested over a two-year period by older adults in Port Charlotte, Florida. The brain-stimulating, challenging, novel-enriched activities in Brain Fitness can benefit anyone — regardless of age or cognitive ability.
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