The sudden release of a neurotransmitter can alter mood and behavior within seconds.

Researchers measured how different neurotransmitters affected sleep patterns in mice.

The retrograde neurotransmitter was released from the postsynaptic neuron and traveled back to the presynaptic axon to regulate neurotransmitter release.

Researchers discovered that retrograde neurotransmitters can modulate synaptic strength by signaling from the postsynaptic neuron back to the presynaptic terminal.