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AMADOR Ana

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Título:

Synchronized HVC activity in auditory perception in canaries

Autor/es:

S. BOARI, G.B. MINDLIN , A. AMADOR

Lugar:

Punta del Este

Reunión:

Conferencia; Dynamics Days LAC; 2018

Resumen:

Songbirdsare a well-established animal model to study the principles underlying vocalproduction, perception and learning. The ?song system? is a network of neuralnuclei of a songbird?s brain dedicated to these tasks. Telencephalic nucleusHVC is involved in the vocal production and receives highly processed auditoryinputs. In asleep or anaesthetized birds, HVC units also respond to a playbackof the birds own song (BOS). This auditory response presents a similar firingpattern to the one measured while the bird is singing, suggesting a sharedcoding mechanism for the two tasks.In thiswork, we studied the auditory responses to BOS at HVC in urethane-anaesthetized male adult canaries (Serinus canaria). Acute extracellularrecordings were conducted at HVC with 32 channel multi-electrode arrays, whichprovided the possibility to study spatial information together with temporalmodulations of the neural activity. The recorded signals allow to recover theslow components due to synaptic currents, commonly referred to as LFP (<300Hz) as well as the spiking components (>500 Hz). We found that the LFPs atHVC present rhythmic oscillations, locked to the syllabic rate of differentsong phrases. For a specific syllable type, we found that LFP can be related toinstances of synchronous firing of multiple neurons in the recording. Thisexperimental result is in accordance with a previously developed model for songproduction. This study could provide a new perspective on the study of theneural coding of auditory processing of song and its link to vocal behavior insongbirds.

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