RT Journal Article
T1 A stable home-base promotes allocentric memory representations of episodic-like everyday spatial memory.
A1 Broadbent, Nicola
A1 Lumeij, Lucas Berend
A1 Corcoles, Marta
A1 Ayres, Alice I
A1 Bin Ibrahim, Mohammad Zaki
A1 Masatsugu, Brittany
A1 Moreno, Andrea
A1 Caramés-Tejedor, José María
A1 Begg, Elizabeth
A1 Strickland, Lauren
A1 Mazidzoglou, Theofilos
A1 Padanyi, Anna
A1 Munoz-Lopez, Monica
A1 Takeuchi, Tomonori
A1 Peters, Marco
A1 Morris, Richard RGM
A1 Tse, Dorothy
A1 Munoz-Lopez, Monica
K1 Hipocampo (Cerebro)
K1 Memoria
AB A key issue in neurobiological studies of episodic-like memory is the geometric frame of reference in which memory traces of experience are stored. Assumptions are sometimes made that specific protocols favour either allocentric (map-like) or egocentric (body-centred) representations. There are, however, grounds for suspect- ing substantial ambiguity about coding strategy, including the necessity to use both frames of reference occasionally, but tests of memory representation are not rou- tinely conducted. Using rats trained to find and dig up food in sandwells at a par- ticular place in an event arena (episodic-like 'action-where' encoding), we show that a protocol previously thought to foster allocentric encoding is ambiguous but more predisposed towards egocentric encoding. Two changes in training protocol were examined with a view to promoting preferential allocentric encoding—one in which multiple start locations were used within a session as well as between sessions; and another that deployed a stable home-base to which the animals had to carry food re- ward. Only the stable home-base protocol led to excellent choice performance which rigorous analyses revealed to be blocked by occluding extra-arena cues when this was done after encoding but before recall. The implications of these findings for studies of episodic-like memory are that the representational framework of memory at the start of a recall trial will likely include a path direction in the egocentric case but path destination in the allocentric protocol. This difference should be observable in single-unit recording or calcium-imaging studies of spatially-tuned cells.
PB European Journal of Neuroscience, Wiley
YR 2020
FD 2020-01-16
LK https://hdl.handle.net/10630/33342
UL https://hdl.handle.net/10630/33342
LA eng
NO Broadbent, N., Lumeij, L. B., Corcoles, M., Ayres, A. I., bin Ibrahim, M. Z., Masatsugu, B., Moreno, A., Carames, J., Begg, E., Strickland, L., Mazidzoglou, T., Padanyi, A., Munoz-Lopez, M., Takeuchi, T., Peters, M., Morris, R. G. M., & Tse, D. (2020). A stable home‐base promotes allocentric memory representations of episodic‐like everyday spatial memory. European Journal of Neuroscience, 51(7), 1539–1558.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026