A synapse is the junction between two nerve cells, or neurons, where the transfer of electrical or chemical signals occurs. The term “synapse” is often used to describe both the physical junction between two neurons and the process of signalling that occurs at that junction. Drugs that affect synaptic signalling, such as neurotransmitter modulators and synaptic stabilisers, are used to treat a wide range of neurological and psychiatric conditions, including depression, anxiety, and epilepsy.