messenger brain chemicals that communicate between neurons are known as
But one cell doesnât actually touch another, and the signals canât jump across the tiny spaces in between. To cross those tiny gaps, called synapses, they rely on chemical messengers. These chemicals are known as neurotransmitters. And their role in cell talk is called neurotransmission. When an electrical signal reaches the end of a neuron, it triggers the release of tiny sacs that had been inside the cells.