Have you ever heard others say that the adult brain has a fixed number of neurons and is unable to generate new ones once these die out? Indeed it was traditionally believed among scientists that the adult vertebrate brain could only lose neurons, never gain. (Kalat, 2007) Recently though, a small number of exceptions have been found. Among them, and of special interest to us of course, are the olfactory receptors. Indeed, these only tend to survive a couple of months at best, due to the fact that they constantly come into contact with harmful chemicals, as well being subjected to natural wear and tear, exposed as they are to the natural world. Thankfully, the dying olfactory receptors are constantly replaced by new developing cells! Too, adult stem cells within the brain have the ability to propagate daughter cells. These “migrate to the olfactory bulb and transform into glia cells or neurons" (Gage, 2000).
References: Graziadei & de Han, 1973, Gogos et al., 2000 and Kalat, 2007.
Image: Coronal section of olfactory bulb, http://commons.wikimedia.org
Perfume holds the power to enhance my mood and even change it. I can use it to highlight aspects of myself. It can make my heart swoop with joy and it can send me back in time by awakening distant memories. I want to share my love for perfume with you. Let's exchange our thoughts and share our experiences.