In neuropsychology and physiology, the process of depolarization describes the situation when the electrochemical charge of a neuron becomes less negative and nerve impulses are transmitted. When a neuron becomes activated, there is a sudden influx of sodium ions into the cell which predictably ends in the triggering of an action potential. This communication is critical in the innervation of neurons, muscles, and glands, and is the foundation of behavior and all activity in the brain. This process of depolarization enables psychologists to understand the intricate workings of the brain. For example, when a nerve cell is activated and sends an impulse to move the hand, depolarization is occurring.
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