Neurons react to mental stimulation by creating new connection; these connections are by means of different extensions called axons and dendrites. The longer axons connect nerve impulses to other neurons and the short dendrites are designed to receive nerve impulses and send them to the cell body. These connections are considered especially important as they are the means by which brain cells interconnect with each other. Dendrites fire neurotransmitters between cells; these are the chemical messengers that carry information between cells, and as you age these also too can be rejuvenated through stimulation of the mind.