Quantcast
Last updated on April 17, 2014 at 1:21 EDT

Latest Olfactory system Stories

2014-04-11 10:16:28

To accommodate a lifetime of scents and aromas, mammals have hundreds of genes that each produce a different odorant receptor. The complex and diverse olfactory system they build remains adaptable, but a new study in the journal Science shows that the system's flexibility, or plasticity, has its limits. Working in mice, Brown University scientists found that the fundamental neural wiring map between the nose and the brain becomes established in a critical period of early development and then...

2014-04-11 10:13:44

Stowers investigators reveal a developmental switch in targeting capacity of olfactory neurons The human nose expresses nearly 400 odorant receptors, which allow us to distinguish a large number of scents. In mice the number of odor receptors is closer to 1000. Each olfactory neuron displays only a single type of receptor and all neurons with the same receptors are connected to the same spot, a glomerulus, in the brain. This convergence, or wiring pattern, is often described as an...

Jumping bristletail Lepismachilis y-signata
2014-03-30 03:00:54

Max Planck Institute for Chemical Ecology Odorant receptors of recent insects evolved long after insects migrated from water to land. An insect’s sense of smell is vital to its survival. Only if it can trace even tiny amounts of odor molecules is it is able to find food sources, communicate with conspecifics, or avoid enemies. According to scientists at the Max Planck Institute for Chemical Ecology, many proteins involved in the highly sensitive odor perception of insects emerged...

Human Nose Can Distinguish More Than 1 Trillion Scents
2014-03-21 04:48:03

redOrbit Staff & Wire Reports - Your Universe Online For decades, experts have claimed that people were capable of detecting 10,000 different odors, but new research appearing in the March 21 edition of Science suggests that the actual number of scents detectable by the human nose is considerably higher. In fact, according to an experiment led by Andreas Keller of the Rockefeller University Laboratory of Neurogenetics and Behavior, human noses and brains are sensitive enough to...

The tent-making bat Uroderma bilobatum
2014-03-04 05:07:25

Brett Smith for redOrbit.com - Your Universe Online While scientists know that a superfamily of genes inside olfactory receptors is responsible for our sense of smell – we still don’t know the mechanism behind the interpretation of odor molecules into a particular smell. A new study published in the journal Molecular Biology and Evolution has found a distinct gene pattern in the olfactory receptors of fruit-eating bats – potentially shedding some light on the mechanism behind our...

Odor Receptors Found In Lungs
2014-01-03 10:22:27

Brett Smith for redOrbit.com - Your Universe Online New research published in the American Journal of Respiratory Cell and Molecular Biology has revealed that odor receptors aren’t just found in the nose – they also line the lungs as well. However, instead of being used to detect the aroma of blueberry cobbler or a succulent roasting chicken, the odor receptors in the lungs trigger a response designed to protect the airways. “We forget,” said study author Yehuda Ben-Shahar,...

Genetics Play A Large Part In Olfaction
2013-12-14 05:33:05

April Flowers for redOrbit.com - Your Universe Online People react differently to the same smells. Something that smells wonderful to you could be offensive to your friend, but why this is so has been a mystery. The answer could lie in your genetic makeup, says a research team from Duke University. Their findings, published in the early online edition of Nature Neuroscience, reveal that a difference at the smallest level of DNA — one amino acid on one gene — determines whether or not...

Fear Odor Reaction
2013-12-13 08:45:51

redOrbit Staff & Wire Reports - Your Universe Online Neuroscientists at Rutgers University have discovered that fear reactions can occur in the olfactory system, even before the brain has had an opportunity to interpret and associate a particular odor with trouble. In a study published Thursday in the journal Science, John McGann, associate professor of behavioral and systems neuroscience at Rutgers and colleagues, report that neurons in the noses of laboratory animals reacted ...

2013-12-09 14:07:38

We each live in a unique odor world According to Gertrude Stein, "A rose is a rose is a rose," but new research indicates that might not be the case when it comes to the rose's scent. Researchers from the Monell Center and collaborating institutions have found that as much as 30 percent of the large array of human olfactory receptor differs between any two individuals. This substantial variation is in turn reflected by variability in how each person perceives odors. Humans have about...

Smell Processes In Our Brain Better Understood Through Locust Study
2013-11-26 09:53:56

April Flowers for redOrbit.com - Your Universe Online Environmental stimuli often trigger our sense of smell before we exhibit any other response. Smells trigger neurons in our brains that alert us to take action, but there are often more than one odor in our environments at any given time. Barani Raman, PhD, of the School of Engineering & Applied Science at Washington University in St. Louis, wanted to answer the question of how our brain processes multiple odors received...