Excitatory neurons are a type of nerve cell that promote the transmission of signals in the brain and nervous system. They release neurotransmitters, such as glutamate, which increase the likelihood that neighboring neurons will fire an action potential. This process is essential for various brain functions, including learning, memory, and overall communication between neurons. These neurons play a crucial role in creating neural circuits that facilitate information processing. By enhancing signal transmission, excitatory neurons help coordinate activities across different brain regions. Their balanced interaction with inhibitory neurons is vital for maintaining proper brain function and preventing excessive neuronal activity.