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The simple sense of smell |
DOI: 10.1038/nature07983 |
Attraction and repulsion to simple scents are controlled by individual neuronal centres rather than an array of several centres, reports a study published online in Nature this week. |
Each distinct scent activates several types of olfactory neurons in the fruitfly Drosophila. These olfactory neurons alternatively aggregate into distinct neuronal centres — the glomeruli. A scent activates numerous glomeruli depending on how complex it is. However, the pattern of glomeruli necessary to process innate scents, such as vinegar, which trigger an unlearned behavioural response, has been unknown. |
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