The neuroscience of intelligence and how it works
Let's start by examining the neuroscience of intelligence and precisely how it can be increased from a theoretical point of view.
Welcome to your brain. Here you have a huge interconnected network of neurons that we collectively refer to as your "connectome." Think of it as the world's largest mental map, except it's made up of billions of connections. Each of these neurons represents an experience, an action, a memory or a qualia.
Thus, for example, we have the visual cortex (V1), which contains all the neurons responsible for vision. If the back of the skull were opened and each of these neurons were stimulated with an electrode (which, by the way, has already been tested), one would see points of light in the vision corresponding to the neuron in question.
Similarly, if neurons in the motor cortex are stimulated, this would cause the arm or leg to move, or might cause a sensation to be felt in the ear.
Other neurons have different jobs. For example, there are those that have the function of storing memories. They fire when we remember things that happened to us in the past. Others may make us feel happy or sad. Still others may represent aspects of our personality or our ideas.