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This is a diagram of the human olfactory system

·September 24, 2013·3 min read

A Shot of Anxiety and the World Stinks

A new neuroimaging study reveals how anxiety or stress can link areas of the brain for emotion and olfactory processing, making neutral odors smell malodorous.

The images above depict the activity of the mushroom body Kenyon cells in the fruit fly brain in response to 3 different odors.

Featured Neuroscience

·June 18, 2013·4 min read

The Discerning Fruit Fly: Linking Brain-Cell Activity and Behavior in Smell Recognition

Researchers have mapped the activity of brain cells in the mushroom body of flies conditioned to have Pavlovian behavioral responses to different odors. The findings suggest the activity of as few as 25 neurons are required to be able to distinguish between different odors.

Featured Genetics

·May 29, 2013·3 min read

Genetic Engineering Alters Mosquitoes’ Sense of Smell

In one of the first successful attempts at genetically engineering mosquitoes, HHMI researchers have altered the way the insects respond to odors, including the smell of humans and the insect repellant DEET.

Featured

·October 4, 2012·4 min read

Babies Learn the Smell of Mum

Newborn mice use mom's unique odor, not a pheromone, to begin breastfeeding.

Featured Psychology

·September 20, 2012·2 min read

‘Psychopaths’ Have An Impaired Sense of Smell

People with psychopathic tendencies have an impaired sense of smell, which points to inefficient processing in the front part of the brain (orbitofrontal cortex) according to a new study.

Featured Neuroscience

·July 18, 2012·3 min read

Dopamine: A Substance with Many Messages

Researchers recently localised and identified the most important types of nerve cells involved in forming positive and negative memories of a fruit fly. All four nerve cell types they discovered use dopamine to communicate with other nerve cells. Three of the nerve cell types assume various functions in mediating negative stimuli, while the fourth enables the fly to form positive memories.