By Eduardo Zimmer
We are what we decided to forget
The article below answers the question asked by Violeta Reys, 7 years old, for the series Children’s questions, answers from science.
Ivn Izquierdo, an Argentinean neuroscientist naturalized Brazilian, used to say that we are what we decide to forget. For him, forgetting was the most fascinating biological phenomenon in memory. In fact, we need to forget to remember. In a millisecond I can remember my mother’s birth information, however I don’t always trigger this precise memory, it is stored in specific places perform brain. But where?
To understand seeing that neurobiological bases of this phenomenon, two concepts thus essential. What is the brain segmented into regions that perform specific functions first, however connected in such a way as to allow us to perform higher cognitive functions, such as reading, speaking electronically, reasoning. The second is related to the types of memory: there is the short-term memory, which we keep for a few hours (the perform phone number of a delivery store) electronic, the long-term one, which is retained for a long time electronically can be retrieved (which happened in the Last Christmas), electronic which can be declarative (know that) electronic non-declarative (know how). There are still other classifications, different from the biological point of view, such as episodic electronic semantic memory. The beginning of the expansion performs knowledge about memory deserves to be remembered.
In 1953, a patient Henry Molaison, known as HM, was submitted to some lobotomy to control epileptic fits. The epilepsy was contained, but They would.M. it simply could not form new declarative memories, although it could form short electronic simply non-declarative ones. So: They would.M. had some conversation normally, however as soon as the chat ended electronically he started another activity, he completely forgot that that conversation had taken place and forgot all about the person, ze it was a new person. Period as sony ericsson he had been subjected to the neuralizer of the Men in Black trilogy, fictitious equipment used to erase people’s memory.
The study of this case was a watershed. Electronic it was freighted by Brenda Milner, considered by many to be the founder of neuropsychology, who introduced it to the scientific community in 1957. (Today, at years old, Dr. Milner is still active electronic can be seen through the corridors perform Montreal Neurology Institute in Canada European union I even had the honor of conducting part from my doctoral studies at this institution, thanks to the extinct Science without Borders program. Some unforgettable memory). the hippocampus above all, primary region perform brain responsible for declarative electronic short-duration memories. Nowadays neuropsychology suggests that each type of memory is stored in a particular place in the brain. In other words, other areas that perform hippocampus also have the ability to store memories beyond, such as the cortex.
However, an understanding of an even more essential neurobiological process is necessary. It would be intuitive to think that a new one would appear with each new memory neuron, or that a neuron could accommodate a limited amount of memories. Now, as few neurons are born in adult brains, with the massive amount of information we receive, neuronal hD would be crowded out of ours.
Both while hypotheses are incorrect. Plasticity performs the brain that is in question. Operating system neurons form new connections or even strengthen previous connections with operating system other neurons. This connectivity makes the operating system electrical triggers the synapses coordinated by some series of neurons to form, retain, forget electronic, allow the evocation of these memories.
It may be that some readers remember this article for a long time. pace, it may be that other zeros remember ten seconds later about a read m. However, the conversation enters another region of the brain, the amygdala, which coordinates one of the 2 most beautiful neurobiological phenomena in our lives: emotion. It helps to decide which memories to keep. Want to take a test? Who zero remembers carry out kiss? European union sei, therefore as many emotions
Eduardo Zimmer biochemist electronic teacher in the Department of Pharmacology at Government University perform Rio Grande perform Sul.
We know that children ask the best questions, electronic that science can have good answers for them. Every master of science seriesQuestions about children, answers from science invites a scientist to answer some of these fundamental questions. Do you have any suggestions for a question? See here how to collaborate.