Neuroscientists have found that the correlation between similar odors — map of smells — defined as the olfactory bulb, and in piriformes the cortex of mice, and in similar ways for different individuals. Cora rebuilds occurred in the bulbs map better clusters odors and improves the accuracy of coding at the preliminary acquaintance with the odors. Article published in the journal Nature.
We can distinguish the smells of orange and lemon and to understand that both belong to the citrus flavor. But the card smells formed in our brain is unknown. Neurons in the olfactory epithelium have different sets of receptors and react to your smell, and then randomly carry information in Piriform (primary olfactory) cortex. In response to individual odors in piriformes the cortex are activated by spatial, not related to nerve cells. In the end, it is unclear how the brain of seemingly random excitations highlights the connection between smells, maps and divides them into groups.
Scientists from Italy and the United States under the leadership of Robert Sandip Datta (Sandeep Robert Datta) from Harvard medical school investigated the response to various smells of the neurons of the second (which includes projections) and third (associative) piriformes layers of the cortex of mice using multiphoton microscopy. Neuroscientists have used a library of smells, for which we know the formulas of all substances, and selected from it three sets of odors (22 each). In the first set were the smells of different structures distributed in the space of smell, the second ones are grouped in six clusters, the third one differing only in the length of the carbon chain.