[Todos] Coloquio extraordinario DF - Michael Yartsev - Martes 30/06, 14 h

[Nahuel Andrés]

Estimadas/os,

Les invitamos a un nuevo coloquio extraordinario del DF a cargo de,

*Michael Yartsev* (University of California, Berkeley & HHMI)
*Ensemble Dynamics and 3D Spatial Codes in Freely Flying Bats*

The hippocampal formation has been central to our understanding of spatial
memory, yet many of its canonical ensemble phenomena have been studied
primarily in rodents performing structured tasks. This raises two
fundamental questions: do these ensemble dynamics exist in non-rodent
mammals engaged in natural movement, and if so, what mechanisms organize
them when the underlying behavioral and neurophysiological rhythms differ
across species? In this talk, I will address these questions using
large-scale, wireless Neuropixels recordings from freely flying Egyptian
fruit bats in the laboratory and outdoors.

I will first describe hippocampal ensemble dynamics during flight and rest,
including replay-like events and rapid sequential activity. A surprising
theme is that, in flying bats, these dynamics appear to align with the
animal's movement rhythms rather than with classical hippocampal theta
oscillations. I will then discuss motor and hippocampal coordination during
flight, including evidence that rhythmic wing motion and motor-cortical
dynamics may provide an ethologically grounded timing signal for organizing
hippocampal activity. Finally, I will turn to the entorhinal cortex and the
long-standing question of how grid-cell and ensemble codes support
navigation in three dimensions. Recent results reveal periodic firing and
toroidal population dynamics in flying bats, with these dynamics mapping
onto the animal's plane of motion. Together, these findings suggest a
unified, species-aware view of spatial coding: conserved computational
principles may be implemented through the natural movement patterns and
ecological demands of each animal. More broadly, the results illustrate how
careful curiosity about an animal's behavior can uncover simple and elegant
solutions to seemingly difficult neural coding problems.

*Aula Federman* - Pabellón 1 - Ciudad Universitaria - CABA
Cecilia y Nahuel - Comisión organizadora de los coloquios del DF 2026
------------ próxima parte ------------
Se ha borrado un adjunto en formato HTML...
URL: <http://mailman.df.uba.ar/pipermail/todos/attachments/20260626/8690eb41/attachment.html>