Mammals can recognize thousands of odors, some of which prompt powerful responses. Recent experiments illuminate how the nose and brain may perceive scents.

The odour emitted by the patient may be one of the first major clues leading to an early diagnosis. Certain dermatological conditions produce an obnoxious smell and several metabolic diseases are associated with a characteristic odour. Schizophrenia and several rare inborn errors of metabolism associated with enzyme deficiencies are linked with distinctive body odour. THE status of body odour h...

The stimuli used in taste research are usually considered to be odourless. This was tested in two experiments with aqueous solutions of two representative compounds for each of the five taste qualities including umami. In the first experiment elderly and young subjects rated the intensity and pleasantness of three concentrations of the stimuli, while wearing or not wearing a noseclip. Saliva pr...

of the advancing civil rights movement in the United States that, in November of 2008, citizens of this country elected a black man to the offi ce of President. Barack Obama is not personally descended from African slaves; still his ascension to the highest elective US offi ce, despite the lingering liability of his skin color, represents a true benchmark in a sordid history of abuse that is in...

The olfactory system detects and discriminates myriad chemical structures across a wide range of concentrations. To meet this task, the system utilizes a large family of G protein-coupled receptors-the odorant receptors-which are the chemical sensors underlying the perception of smell. Interestingly, the odorant receptors are also involved in a number of developmental decisions, including the r...

In mammals, odorants are detected by a large family of receptors that are each expressed in just a small subset of olfactory sensory neurons (OSNs). Here we describe a strain of transgenic mice engineered to express an octanal receptor in almost all OSNs. Remarkably, octanal triggered a striking and involuntary phenotype in these animals, with passive exposure regularly inducing seizures. Octan...