A diagram that shows the process of presynaptic modulation. It shows two types of vesicles A and B which are spherical in shape and have a dense core. The first vesicle on the left is yellow and has multiple small holes on its surface. It is connected to the second vase on the right which is orange and has a small hole in the center. The vase is also yellow and appears to be connected to a larger vase. There are also several smaller holes scattered around the vase which could be nerves or nerves. These holes are likely used to control the movement of the neurons. The diagram also shows how the neurons interact with each other allowing them to move in different directions. The image is labeled with the words "Presynaptic Modulation" at the top indicating that it is a representation of the process.

• Illustration

• Outreach and Education