närviimpulssidena
Närviimpulssidena, known in English as nerve impulses or action potentials, are the fundamental units of communication within the nervous system. These are electrochemical signals that travel along nerve cells, or neurons, allowing them to transmit information rapidly throughout the body. A nerve impulse is generated when a neuron is stimulated, causing a rapid change in the electrical charge across its cell membrane. This change involves the movement of ions, primarily sodium (Na+) and potassium (K+), in and out of the neuron.
The process begins with a stimulus that causes depolarization, where the inside of the neuron becomes more