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SUMMARY:Neural coding of space: from 3D grid cells to object × place - Gi
 ly Ginosar (Weizmann Institute of Science\, Israel)
DTSTART;VALUE=DATE-TIME:20220620T153000
DTEND;VALUE=DATE-TIME:20220620T163000
UID:https://talks.ox.ac.uk/talks/id/1c0e2f5e-c1df-4649-b135-742ba8bcfeda/
DESCRIPTION:Successful navigation requires knowledge of the space navigate
 d\, and the locations of specific objects within it. To investigate how th
 ese signals are represented in the case of 3D space\, we recorded from med
 ial entorhinal cortex (MEC) neurons in freely flying bats. Alongside 3D bo
 rder cells and 3D head-direction cells\, we found neurons with multiple 3D
  firing fields. Many of these multifield neurons were 3D grid cells\, whos
 e neighbouring fields were separated by a characteristic distance – form
 ing a local order – but lacked any global lattice arrangement of the fie
 lds.\n\nWe modelled grid cells as emerging from pairwise interactions betw
 een fields\, which yielded a hexagonal lattice in 2D and local order in 3D
  – thereby describing findings from both 2D and 3D grid cells using one 
 unifying model. We also found neurons that fired at one or two locations\,
  near specific rest-objects that were identical in shape but varied in the
 ir position in the room. Unlike object-vector cells\, which are found in t
 he superficial layers of MEC and fire at the vicinity of all objects\, the
 se neurons fired at the vicinity of one object in a specific position and 
 were mainly found in the deep layers of MEC. Moreover\, these cells fired 
 near the rest-object when the bat flew from or to the object\, but not whe
 n it flew through the same location without object-engagement – thus enc
 oding object × position.\n\nOur results suggest two things: First\, the f
 inding of local but not global order in 3D grid cells call for re-thinking
  the role of grid cells in spatial coding.  Second\, the data on object ×
  position coding point to a broader prevalence than currently thought for 
 conjunctive coding of navigational variables – including the encoding of
  objects\, which are crucially important for navigation. \nSpeakers:\nGily
  Ginosar (Weizmann Institute of Science\, Israel)
LOCATION:Sherrington Library\, off Parks Road OX1 3PT
TZID:Europe/London
URL:https://talks.ox.ac.uk/talks/id/1c0e2f5e-c1df-4649-b135-742ba8bcfeda/
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DESCRIPTION:Talk:Neural coding of space: from 3D grid cells to object × p
 lace - Gily Ginosar (Weizmann Institute of Science\, Israel)
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