Description: Excitatory neurons excite their targeted neurons. In the
central nervous system, including the brain, they are glutamatergic.
In the peripheral nervous system acetylcholine is most often the
neurotransmitter.
Description: Modulatory neurons evoke neuromodulation. Neuromodulation
depends on many neurotransmitter systems such as dopamine, serotonin,
and acetylcholine. The effect is diffuse as opposed to directly
targeting particular neurons.
