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At least 415 records · Page 23Linked to original sources
PubMed2006

Seeing at a glance, smelling in a whiff: rapid forms of perceptual decision making.

Intuitively, decisions should always improve with more time for the accumulation of evidence, yet psychophysical data show a limit of 200-300 ms for many perceptual tasks. Here, we consider mechanisms that favour such rapid information processing in vision and olfaction. We suggest that the brain limits some types of perceptual processing to short, discrete chunks (for example, eye fixations and sniffs) in order to facilitate the construction of global sensory images.

Animals↗
PubMed1995

The molecular logic of smell.

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

Animals↗
PubMed2003

Sense of smell: recognition and transduction of olfactory signals.

The primary processes in odour perception, i.e. recognition and transduction of olfactory stimuli, are mediated by the chemosensory olfactory neurons. Interaction of odorous compounds with suitable receptor proteins in the membrane of a subset of cells elicits chemo-electrical transduction pathways, including second messenger cascades and ion channels, that modulate the excitability of the sensory neurons, i.e. converting the chemical stimulus into electrical impulses. The encoded information is conveyed via the axons onto distinct glomeruli in the olfactory bulb. Olfactory sensory cells expressing the same receptor type are segregated spatially in a distinct zone of the nasal epithelium and converge their axons to one or a few distinct glomeruli. The emerging chemotopic maps are considered to be crucial for processing and encoding sensory information of olfactory stimuli.

Animals↗
PubMed1991

Female effect in sheep. II. Role of volatile substances from the sexually receptive female; implication of the sense of smell.

The importance of olfactory cues in inducing luteinizing hormone and testosterone secretion as a response to stimulation by sexually receptive ewes has been tested. In sexually experienced rams, olfactory stimulation with urine, wool and vaginal secretions from sexually receptive females placed in a mask did not induce an endocrine response. The female-induced secretion of LH and testosterone was similar in anosmic, sham-operated and in control rams. These results show that olfactory cues are not necessary in the mediation of interindividual stimulation of endocrine response in the sexually experienced ram.

Animals↗