The insula modulates arousal-induced reluctance to try novel tastes through adrenergic transmission in the rat

Sebastián Rojas, Raúl Diaz-Galarce, Juan Manuel Jerez-Baraona, Daisy Quintana-Donoso, Rodrigo Moraga-Amaro, Jimmy Stehberg

Resultado de la investigación: Contribución a una revistaArtículo

5 Citas (Scopus)

Resumen

Reluctance to try novel tastes (neophobia) can be exacerbated in arousing situations, such as when children are under social stress or in rodents, when the new taste is presented in a high arousal context (HA) compared to a low arousal context (LA). The present study aimed at determining whether adrenergic transmission at the Insula regulates the reluctance to try novel tastes induced by arousing contexts. To this end, a combination of systemic and intra-insular manipulations of adrenergic activity was performed before the novel taste (saccharin 0.1%) was presented either in LA or HA contexts in rats. Our results show that systemic adrenergic activity modulates reluctance to try novel tastes. Moreover, intra-insular microinjections of propranolol or norepinephrine (NE) were found to modulate the effects of arousing contexts on reluctance to try novel tastes. Finally, intra-insular propranolol blocked epinephrine-induced increased reluctance, while intra-insular NE blocked oral propranolol-induced decreases in reluctance and increased the reluctance to try novel tastes presented in low arousing contexts. In conclusion, our results suggest that the insula is a critical site for regulating the effects of arousal in the reluctance to try novel tastes via the adrenergic system.

Idioma originalInglés
Número de artículo164
PublicaciónFrontiers in Behavioral Neuroscience
Volumen9
N.ºJUNE
DOI
EstadoPublicada - 29 jun 2015

Áreas temáticas de ASJC Scopus

  • Psicobiología
  • Neurociencia cognitiva
  • Neuropsicología y psicología fisiológica

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