INVESTIGADORES
BERON DE ASTRADA Martin
congresos y reuniones científicas
Título:
Visual Learning Investigated By In Vivo intracellular Recordings In A Crab (presentación oral)
Autor/es:
DANIEL TOMSIC Y MARTÍN BERÓN DE ASTRADA
Lugar:
Bäckaskog Castle, Sweden
Reunión:
Conferencia; International Conference on Invertebrate Vision; 2001
Resumen:
The escape response elicited by a visual danger stimulus (a screen moving overhead) in the crab Chasmagnathus rapidly declines as a result of stimulus repetition (Tomsic et al. 1993. J Comp Physiol 173:621-633). High frequency of stimulation gives rise to a short memory (minutes) whereas low frequency yields a long-term memory (> 5 days) (Pedreira et al. 1998. Anim Learn Behav 26:34-45).  In order to study the neurophysiological processes that govern the escaping and its change by learning, we developed a preparation to perform long lasting intracellular recordings in the intact animal (Berón de Astrada et al. 2001. J Comp Physiol 187: 37-44). In spite that movement sensitive neurons of the crab (MSNs) appeared as a rather heterogeneous neuronal population (Berón de Astrada and Tomsic, in this issue), when confronted with repetitive presentations of the visual stimulus these neurons performed quite homogeneously, and displayed a strikingly similar response profile to that showed by the animals in behavioral tests. We discuss these results in connection with the advantages offered by crabs to perform long-term intracellular recordings in a living and intact animal.