As a kid, one of my dreams was to be able to look at the brain with a microscope and find every connection between each neuron. When I started neuroscience research, I realized this was an unrealistic dream – the number of connections is too big. To find all the connections between every neuron in a chunk of brain smaller than one cubic millimeter, I would have to spend years, if not decades, under the electron microscope, clicking on a computer. Completing the entire brain would be impossible in a lifetime, even for a large group of scientists. Recently, a professor at the MIT has developed a tool that might change this. Continue reading
Sometimes bigger really is better – but does the size of the brain, or brain bumps, mean what we think? When it comes to complex brain functions, it’s good to remember the old saying: “the map is not the territory”.
Our social environment is hierarchical and we can all guess roughly where we and others lie in this hierarchy. It rarely needs to be stated explicitly – a boss does not need to remind his employee that he’s the boss every day. Yet hierarchy acts in the background, like an invisible hand, modifying almost each of our interactions. It makes us more or less polite, familiar, or audacious with those people for whom each attitude is more or less appropriate. Continue reading
Like many animals, we thrive to repeat the behaviors that have paid off in the past and avoid those that did not. This principle is at the heart of most learning theories. It is also one of the most important functions of the brain: to adjust behaviors according to our experiences. Continue reading