IFIBIO HOUSSAY   25014
INSTITUTO DE FISIOLOGIA Y BIOFISICA BERNARDO HOUSSAY
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Responses to visual motion stimuli of lobula giant neurons from a crab assessed by multielectrode recording
Autor/es:
ALEJANDRO CÁMERA; DANIEL TOMSIC; MARIANO BELLUSCIO
Reunión:
Congreso; 2018 Congress for Neuroethology; 2018
Resumen:
Oneof the main challenges in neuroscience nowadays is to understand theconcerted function of individual neurons dedicated to particularbehaviors in the behaving animal. This goal first requires to attainan adequate characterization of the behavior as well as anidentification of the key neuronal elements associated to thataction. Such conditions has been considerably attained for the escaperesponse to visual stimuli in the crab Neohelice. In fact, acombination of in vivo intracellular recording and staining, withbehavioral experiments and modeling, led us to postulate that amicrocircuit formed by four classes of identified lobula giant (LG)neurons operates as a decision making node for a number of importantvisually-guided components of the crab ́s escape behavior (1). Thesestudies, however, were done by recording LG neurons individually. Inorder to investigate the concerted functioning of the LG group, webegan to usemultielectrode extracellular recordings. Here we describe themethodology and show results of simultaneously recorded responsesfrom different neurons to a variety of visual stimuli. The differentLG classes can be distinguished by their electrical activity anddifferential responses to visual stimuli. Simultaneous recordingsconfirmed the rightfulness of previous interpretations about LGinteractions assumed from independent intracellular recordings. Thecurrent results establish the bases for and show the feasibility ofour next goal of recording the activity of LG neurons in the behavinganimal. (1) Tomsic D. Visual motion processing subserving behavior incrabs. Curr. Op. Neurobiol. 41: 113-121. 2016p { margin-bottom: 0.1in; line-height: 115%; }