Second-order fear conditioning prevented by blocking NMDA receptors in amygdala

Article Abstract:

Research into the acquisition of second-order fear conditioning has focused on the N-methyl-D-aspartate (NMDA)-receptor AP5. It was found that intra-amygdala AP5 boosts expression of conditioned fear to the conditioned stimulus which provides the reinforcement signal for second-order conditioning. It seems likely that NMDA receptors play a role in the basolateral amygdala in fear conditioning based on two forms of learning. The basolateral amygdala appears to be vital for learning which involves a reinforcer with conditioned motivational value.

Research, Neural receptors

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A second class of chemosensory receptors in the olfactory epithelium

Article Abstract:

The discovery of a second family of receptors in the mouse olfactory epithelium is reported. Trace amine-associated receptors (TAARs) are expressed in unique subsets of neurons dispersed in the epithelium and their evolutionary conservation has suggested a chemosensory function distinct from odorant receptors and a function associated with the detection of social cues.

United States, Epithelium, Olfactory receptors

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Receptors and transduction in taste

Article Abstract:

Significant research effort is being devoted to identifying the receptors and other important molecules of transduction within taste receptor cells. It is likely that taste-driven processing in the brain will become an issue of considerable interest.

Taste, Taste (Sense)

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