In the motor cortex of the macaque monkey, it was discovered that there is a particular set of neurons that discharge both when the monkey observes a given motor act and when it does the same act. These neurons, called “mirror neurons,” represent a system that directly matches observed and executed actions.

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Mirror neurons are cells that respond both when performing a motor act (such as grasping, breaking, or tearing) and when observing others performing a similar act. Mirror neurons are suggested to be involved in the understanding of others’ action and intention and in imitation, by forming a link between the sensory description and the individual motor representation, and may also be a neural substrate of language evolution. They have been found in the ventral premotor cortex (PMv) and inferior parietal lobule. These regions are also shown to be active during the observation of others’ action in functional neuroimaging studies.

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Mirror neurons are a distinct class of neurons that transform specific sensory information into a motor format. Mirror neurons are a class of neurons that become active both when individuals perform a specific motor act and when they observe a similar act done by others.

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Mirror neurons seem to bridge the gap between one agent and another; to represent ‘my action’ and ‘your action’ in the same way. Therefore, it has been suggested that mirror neurons are the key to explaining many aspects of social cognition, including the ability to understand the actions of others, to ‘read minds,’ to imitate and to communicate using gestures and speech. It has even been proposed that mirror neurons are ‘the driving force behind ‘‘the great leap forward’’ in human evolution.’

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Neurons that fire both when the subject performs an action and when the subject observes that same action being performed by another individual.

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Cells that fire when we both perceive and take an action. Because the lit-up areas contain millions of neurons, for humans most researchers speak of a “mirror system,” rather than mirror cells. The mirroring system includes a mechanism that helps the brain record the difference between seeing and acting. Mirror neurons respond to sound, code intentions, and increase in activity with experience.

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There are neurons whose firing rates increase when the monkey makes goal directed movements and when the monkey observes similar movements being made by others.

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This mirror neuron system has since been identified in human beings and is now considered the root of empathy. Beginning from the perception of a basic behavioral intention, our more elaborated human prefrontal cortex enables us to map out the minds of others. Our brains use sensory information to create representations of others’ minds, just as they use sensory input to create images of the physical world. The key is that mirror neurons respond only to an act with intention, with a predictable sequence or sense of purpose. At the most complex level, mirror neurons help us understand the nature of culture and how our shared behaviors bind us together, mind to mind.

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A subset of that fire when I simply watch another person—watch you reach out and do exactly the same action. These neurons are performing a virtual reality simulation of your mind, your brain. Therefore, they’re constructing a theory of your mind—of your intention—which is important for all kinds of social interaction. These [mirror] neurons are probably involved in empathy for pain.

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They discharge both during the execution of specific motor acts and during the observation of similar acts. The observation of an action produces in the observer a motor activation, as if the observer were actually programming the execution of the observed action. This “mirror mechanism“ is thought to be involved in action and intention understanding.

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Mirror neurons are the only brain cells we know of that seem specialized to code the actions of other people and also our own actions. They are obviously essential brain cells for social interactions. Without them, we would likely be blind to the actions, intentions and emotions of other people.

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These are a variety of visuospatial neurons which indicate fundamentally about human social interaction. Essentially, mirror neurons respond to actions that we observe in others. The interesting part is that mirror neurons fire in the same way when we actually recreate that action ourselves. Apart from imitation, they are responsible for myriad of other sophisticated human behavior and thought processes. Defects in the mirror neuron system are being linked to disorders like autism.

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Mirror neurons represent a distinctive class of neurons that discharge both when an individual executes a motor act and when he observes another individual performing the same or a similar motor act.

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Evolution of term - In 2000, the famous neuroscientist and popularizer of science V.S. Ramachandran wrote an edge.org article speculating that “mirror neurons would do for psychology what DNA did for biology: they will provide a unifying framework and help explain a host of mental abilities that have hitherto remained mysterious and inaccessible to experiments.” Ramachandran theorized that mirror neurons might help explain a wide variety of human social abilities. Ramachandran proposed that mirror neurons translate an observed action into a series of commands for the muscles to execute. Mirror neurons may run a sort of virtual reality simulation of what it would be like for oneself to perform that action. Within a year, the use of the phrase “mirror neurons” more than doubled, and over the next decade, mirror neurons captured the public imagination, being touted as able to offer insight into everything from empathizing with therapy clients to international diplomacy, how children learn music, and how people appreciate art.

However, despite claims that mirror neurons might underlie much of what makes humans unique (such as language and culture), until 2008, they had never once been decisively identified in humans. Even as of 2016, only one study, using electrodes implanted into the brains of epilepsy patients, has successfully identified human neurons with properties similar to those found in the macaques. Over the past 10 years, many of the more prominent theories regarding the function of mirror neurons have not survived scrutiny. First, it was seen as increasingly implausible that mirror neurons alone could explain the human capacity for imitation. Second, the theory that the ability to mentally simulate others’ actions (putatively enabled by mirror neurons) is necessary to understand others’ actions has become increasingly shaky. Finally, the theory that mirror neuron defects might underlie autism—the “broken mirror” hypothesis—has proven most dubious of all.

Counterarguments like these have pushed mirror neuron proponents to fine-tune their claims. For example, Rizzolatti, the original discoverer of mirror neurons in macaques, now suggests that mirror neurons might only be required for understanding the actions of others from a first-person perspective. He explains that this internalization of behaviors we see might provide us a deeper level of understanding about another person’s goals, but cedes that mirror neuron activity might only constitute one among several ways of comprehending others’ behavior.

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Whenever individuals observe an action being done by someone else, a set of neurons that code for that action is activated in the observers’ motor system. Since the observers are aware of the outcome of their motor acts, they also understand what the other individual is doing without the need for intermediate cognitive mediation.

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Mirror neurons are a particular class of visuomotor neurons, originally discovered in area F5 of the monkey premotor cortex, that discharge both when the monkey does a particular action and when it observes anotherindividual (monkey or human) doing a similar action.

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A special class of brain cells that fire not only when an individual performs an action, but also when the individual observes someone else make the same movement. The mirror neuron system does more than code the observed action (“that’s a grasp”). It also codes the intention behind the action (“that’s a grasp to drink” or “that’s a grasp to clear the table”).

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There are neurons that discharge not only when the monkey performs goal-oriented actions such as grasping an object, holding it, manipulating it, and bringing it to the mouth, but also when the monkey, completely still, simply observes somebody else performing these actions.

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A particular set of neurons that discharge both when the monkey observes a given motor act and when it does the same act. These neurons called “mirror neurons,” represent a system that directly matches observed and executed actions.

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Mirror neurons are a type of brain cell that respond equally when we perform an action and when we witness someone else perform the same action. The neurons could help explain how and why we “read“ other people’s minds and feel empathy for them.

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Mirror neurons are a class of neurons, originally discovered in the premotor cortex of monkeys, that discharge both when individuals perform a given motor act and when they observe others perform that same motor act. The human mirror system is involved in understanding others’ actions and their intentions behind them, and it underlies mechanisms of observational learning.

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Some say that the neurons are necessary to understand the meaning of others’ behaviors. Others believe that they instead play a more straightforward role, helping us to learn motor tasks or to choose our own actions, or that we use mirror neurons to help predict the actions we are observing, without assigning a goal to them.

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The neurons that “mirrored” observed behavior by firing as if the observer were not just seeing the action but also executing it.

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