What we learn through our senses drives how knowledge is sorted in our brains, according to research recently published in JNeurosci.
When we take a bite of an apple, we learn that "apples taste sweet" the same way we learn much of the information we know -- through a sensory experience. The brain stores such information in groups of neurons according to broad categories, like food and places. But, how does the brain store abstract knowledge that spans multiple categories, like "Granny Smith apples come from Australia"?
Scott Fairhall employed functional magnetic resonance imaging to monitor the brain activity of healthy adults while they answered questions about words from one of three categories - food, famous people, and cities. When participants thought about the tastiness of food, a part of the brain called the insula became active. When they thought about the region the food came from, the insula plus areas involved in spatial perception activated.
The brain relies on regions involved in taste whenever we think about food, even when taste is irrelevant information. Supplementing this knowledge with information from a group of neurons storing a different category of information allows complex knowledge that spans categories -- such as the origin of Granny Smith apples.
Manuscript title: Cross Recruitment of Domain-Selective Cortical Representations Enables Flexible Semantic Knowledge
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JNeurosci, the Society for Neuroscience's first journal, was launched in 1981 as a means to communicate the findings of the highest quality neuroscience research to the growing field. Today, the journal remains committed to publishing cutting-edge neuroscience that will have an immediate and lasting scientific impact, while responding to authors' changing publishing needs, representing breadth of the field and diversity in authorship.
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The Society for Neuroscience is the world's largest organization of scientists and physicians devoted to understanding the brain and nervous system. The nonprofit organization, founded in 1969, now has nearly 37,000 members in more than 90 countries and over 130 chapters worldwide.