Benjamín Alvarez-Borda

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New neurons are constantly added to the high vocal center (HVC) of adult male canaries, Serinus canaria. Singing and testosterone (T) are known to promote this addition, but it is not known whether either variable can act on its own and what is their effect when acting together. We studied this question by castrating adult male canaries in late summer and(More)
The high vocal center (HVC) controls song production in songbirds and sends a projection to the robust nucleus of the archistriatum (RA) of the descending vocal pathway. HVC receives new neurons in adulthood. Most of the new neurons project to RA and replace other neurons of the same kind. We show here that singing enhances mRNA and protein expression of(More)
It has been established that the insular cortex (IC) mediates conditioned taste aversion, and recently we have demonstrated that lesions of this structure disrupt the acquisition of conditioned immunosuppression (CIS). The IC is functionally and reciprocally interconnected with the amygdala (AM) which has been suggested to be involved in neural-immune(More)
Conditioned immunosuppression can be readily obtained in animals by associating a taste with an immunosuppressive drug. On subsequent exposure to the conditioned taste, the animals show an attenuated immune response and also exhibit a conditioned taste aversion. It has been established that insular cortex lesions disrupt the acquisition of conditioned taste(More)
The high vocal center (HVC) of adult male canaries, Serinus canaria, is necessary for the production of learned song. New neurons are added to HVC every day, where they replace older neurons that have died, but the length of their survival depends on the time of year when they are born. A great number of HVC neurons born in the fall, when adult canaries(More)
The experiments described here show that production of serum antibody to a defined protein antigen (hen egg-white lysozyme) can be elicited by classical Pavlovian conditioning in Wistar rats. Reexposure of animals to a gustatory conditioned stimulus that had previously been paired with antigen induces a reliable increase in antibody production. This(More)
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