Electrical impulses are signals that travel through the nervous system, allowing communication between different parts of the body. These impulses are generated by the movement of charged particles, such as sodium and potassium ions, across cell membranes. This process is essential for functions like muscle contraction and the transmission of sensory information. In the brain, electrical impulses facilitate communication between neurons, enabling complex processes like thought, memory, and emotion. The speed of these impulses can vary, but they are crucial for coordinating activities throughout the body, ensuring that responses to stimuli occur quickly and efficiently.