The actions that neurons help us to carry out are often affected by the brain noise.
Even after repeating them thousands of times, those movements that we have a habit of doing assiduously They are never 100% accurate. It happens to all of us, even NBA players. They can spend their whole lives training and perfecting the infallible technique to get a basket, and still they continue to fail triples and free throws that at first they were convinced that they could achieve.
According to a study by neuroscientists from the Duke university, the cause of this frustrating feeling of awkwardness is the different way in which each of us perceives the world around him. The response of a neuron concrete at a certain time always be unique and different from any other response, even if the same conditions of that moment or if the context in which it takes place is already familiar to us.
This is due in particular to a certain type of noise present in the brain, which affects the response gestures that are generated and coordinated by neurons.
Why there is brain noise
Understand how the basal activity or noise in the nervous system is a critical step in understanding how we move and why some of our movements are inaccurate, imprecise, says Stephen Lisberger, principal investigator of the study and chief neurobiologist at the same university's medical school.
Thus, these findings could help explain why our firm does not always look the same (even though it still has the same stroke), or why when hitting the ball with a racket, it takes a different path each time (despite the fact that the grimace remains the same).
The neurons are responsible for making noise in the brain. These nerve cells communicate with each other through electrical impulses, forming a network in charge of transmitting essential information for the organism. However, each neuron is fired separately irregularly and unconsciously, even when the person is doing repetitive activity.
When neurons talk to each other
In the experiment, the electrical activity of the individual neurons of a group of monkeys that follows with the glance the movement of a point on the screen of a computer. Inside the brain, there is a region called MT responsible for coordinating these eye movements, in which each neuron responds to the moving point with a particular delay.
The results revealed unexpected behavior. Although each neuron reacted at a certain time and independently of the others, a delay in the eye movement response of a particular neuron caused nearby neurons to also react later. And in the same way, when a neuron reacted a little earlier, so did its neighbor, thus demonstrating the close relationship between them.
We believe that a more detailed analysis of variation in neural responses going to allow us to understand how the sensory and motor parts of the brain They work together to generate precise and reliable movements, says Lisberger, who thinks that human beings are imperfect beings who seek perfection in each of their actions.
Source | Duke university