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Summary: Researchers identify brain areas associated with developing the ability to “put ourselves in other people’s shoes”.
Source: Max Planck Institute.
By the age of four years we suddenly start to understand what other people think and that their beliefs about the world might differ from our own. We then manage to do what 3-year-olds are not yet capable of – we can put ourselves in someone else’s shoes. Researchers from the Max Planck Institute for Human Cognitive and Brain Sciences in Leipzig were able to show what supports this milestone in development: the maturation of a critical fibre connection in the brain.
If you tell a 3-year-old child the following story of little Maxi, they will most probably not understand: Maxi puts his chocolate on the kitchen table, then leaves to play outside. While he is gone, his mother puts the chocolate in the cupboard. Where will Maxi look for his chocolate? A 3-year-old child will not understand why Maxi would be surprised not to find the chocolate on the table where he left it. It is only by the age of 4 years that a child will correctly predict that Maxi will look for his chocolate where he left it and not in the cupboard where it is now.
Something similar can be observed when you show the 3-year-old child a chocolate box that contains pencils instead of chocolates. If you ask the child what another child would expect to be in the box, they will answer “pencils“, although the other child would not know this. Only a year later, around the age of four years, however, they will understand that the other child had hoped for chocolates. Thus, there is a crucial developmental breakthrough between three and four years: This is when we start to attribute thoughts and beliefs to others and to understand that their beliefs can be different from ours. Before that age, thoughts don’t seem to exist independently of what we see and know about the world. That is, this is when we develop a “Theory of Mind”.
Researchers of the Max Planck Institute for Cognitive and Brain Sciences in Leipzig have now discovered what this developmental breakthrough is associated with. The maturation of fibres of a brain structure called the arcuate fascicle between the ages of three and four years establishes a connection between two critical brain regions: A region at the back of the temporal lobe that supports adults thinking about others and their thoughts and a region in the frontal lobe that is involved in keeping things at different levels of abstraction. It therefore helps us to understand what the real world is and what the thoughts of others are. Only when these two brain regions are connected through the arcuate fascicle can children start to understand what other people think. This is what allows us to predict where Maxi will look for his chocolate. Interestingly, this new connection in the brain supports this ability independently of other cognitive abilities, such as intelligence, language ability or impulse control.
“The strong arcuate fascicle might be the reason why humans are particularly good at understanding what other people think and predicting their actions”, as explained by the first author of the recently published article, Charlotte Grosse Wiesmann from the Max Planck Institute in Leipzig. “Although apes also seem to understand other individuals, they do this to a much lesser extent. This might result from the weaker fibre connection.
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Source: Verena Müller – Max Planck Institute Image Source: NeuroscienceNews.com images are credited to Max Planck Institute. Original Research: Full open access research for “White matter maturation is associated with the emergence of Theory of Mind in early childhood” by Charlotte Grosse Wiesmann, Jan Schreiber, Tania Singer, Nikolaus Steinbeis, and Angela D. Friederici in Nature Communications. Published online March 21 2017 doi:10.1038/ncomms14692
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[cbtabs][cbtab title=”MLA”]Max Planck Institute “Brain Structure That Helps Us Understand What Others Think Revealed.” NeuroscienceNews. NeuroscienceNews, 27 March 2017. <https://neurosciencenews.com/fiber-connection-cognition-6293/>.[/cbtab][cbtab title=”APA”]Max Planck Institute (2017, March 27). Brain Structure That Helps Us Understand What Others Think Revealed. NeuroscienceNew. Retrieved March 27, 2017 from https://neurosciencenews.com/fiber-connection-cognition-6293/[/cbtab][cbtab title=”Chicago”]Max Planck Institute “Brain Structure That Helps Us Understand What Others Think Revealed.” https://neurosciencenews.com/fiber-connection-cognition-6293/ (accessed March 27, 2017).[/cbtab][/cbtabs]
White matter maturation is associated with the emergence of Theory of Mind in early childhood
The ability to attribute mental states to other individuals is crucial for human cognition. A milestone of this ability is reached around the age of 4, when children start understanding that others can have false beliefs about the world. The neural basis supporting this critical step is currently unknown. Here, we relate this behavioural change to the maturation of white matter structure in 3- and 4-year-old children. Tract-based spatial statistics and probabilistic tractography show that the developmental breakthrough in false belief understanding is associated with age-related changes in local white matter structure in temporoparietal regions, the precuneus and medial prefrontal cortex, and with increased dorsal white matter connectivity between temporoparietal and inferior frontal regions. These effects are independent of co-developing cognitive abilities. Our findings show that the emergence of mental state representation is related to the maturation of core belief processing regions and their connection to the prefrontal cortex.
“White matter maturation is associated with the emergence of Theory of Mind in early childhood” by Charlotte Grosse Wiesmann, Jan Schreiber, Tania Singer, Nikolaus Steinbeis, and Angela D. Friederici in Nature Communications. Published online March 21 2017 doi:10.1038/ncomms14692
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