Results 61 to 70 of about 17,689,950 (324)

Dynamic Hippocampal CA2 Responses to Contextual Spatial Novelty

Frontiers in Systems Neuroscience, 2022
Hippocampal place cells are functional units of spatial navigation and are present in all subregions: CA1, CA2, CA3, and CA4. Recent studies on CA2 have indicated its role in social and contextual memories, but its contribution to spatial novelty ...
Guncha Bhasin, Indrajith R. Nair
doaj   +1 more source

Grid Cell Hexagonal Patterns Formed by Fast Self-Organized Learning within Entorhinal Cortex [PDF]

, 2009
Grid cells in the dorsal segment of the medial entorhinal cortex (dMEC) show remarkable hexagonal activity patterns, at multiple spatial scales, during spatial navigation. How these hexagonal patterns arise has excited intense interest. It has previously
Alonso, Berke, Blair, Boucheny, Burak, Burgess, Burgess, Carpenter, Carpenter, Carpenter, Carpenter, Carpenter, Egorov, Frank, Fuhs, Giocomo, Gorchetchnikov, Grossberg, Grossberg, Grossberg, Grossberg, Grossberg, Grossberg, Hafting, Hafting, Hasselmo, Hasselmo, Hasselmo, Klink, Klink, McNaughton, Mhatre, Mhatre, Muller, O'Keefe, Olson, Redish, Rolls, Sargolini, Sharp, Skaggs, Solstad, Song, Taube, Thompson, Wilson   +45 more
core   +2 more sources

Hippocampal Place Cells Demand Attention [PDF]

Neuron, 2004
Hippocampal representations of the environment are thought to play a fundamental role in the encoding, storage, and retrieval of declarative memory. In this issue of Neuron, Kentros and coworkers show that new hippocampal representations stabilize only when animals are attentive.
openaire   +2 more sources

Place cell activation predicts subsequent memory [PDF]

Behavioural Brain Research, 2013
A major quandary in memory research is how hippocampal place cells, widely recognized as elements of a spatial map, contribute to episodic memory, our capacity to remember unique experiences that depends on hippocampal function. Here we recorded from hippocampal neurons as rats performed a T-maze alternation task in which they were required to remember
R Jonathan, Robitsek, John A, White, Howard, Eichenbaum   +2 more
openaire   +2 more sources

The Integration of Goal-Directed Signals onto Spatial Maps of Hippocampal Place Cells.

Cell Reports, 2019
Spatial firing of hippocampal place cells varies depending on the animal's behavior relative to its goals. Here, rats were trained to approach visually guided reward ports in a two-dimensional open field.
Y. Aoki, Hideyoshi Igata, Y. Ikegaya, T. Sasaki   +3 more
semanticscholar   +1 more source

LSD degrades hippocampal spatial representations and suppresses hippocampal-visual cortical interactions

Cell Reports, 2021
Summary: Lysergic acid diethylamide (LSD) produces hallucinations, which are perceptions uncoupled from the external environment. How LSD alters neuronal activities in vivo that underlie abnormal perceptions is unknown.
Carli Domenico, Daniel Haggerty, Xiang Mou, Daoyun Ji   +3 more
doaj   +1 more source

Spatial encoding in primate hippocampus during free navigation. [PDF]

, 2019
The hippocampus comprises two neural signals-place cells and θ oscillations-that contribute to facets of spatial navigation. Although their complementary relationship has been well established in rodents, their respective contributions in the primate ...
Bussell, Robert, Cauwenberghs, Gert, Courellis, Hristos S, Diehl, Geoffrey W, Metke, Michael, Miller, Cory T, Nummela, Samuel U   +6 more
core   +1 more source

Goal-Related Activity in Hippocampal Place Cells [PDF]

The Journal of Neuroscience, 2007
Place cells are hippocampal neurons whose discharge is strongly related to a rat's location in its environment. The existence of place cells has led to the proposal that they are part of an integrated neural system dedicated to spatial navigation, an idea supported by the discovery of strong relationships between place cell activity and spatial problem
Hok, Vincent, Lenck-Santini, Pierre-Pascal, Roux, Sébastien, Save, Etienne, Muller, Robert U., Poucet, Bruno   +5 more
openaire   +3 more sources

Assembly Responses of Hippocampal CA1 Place Cells Predict Learned Behavior in Goal-Directed Spatial Tasks on the Radial Eight-Arm Maze.

Neuron, 2019
Hippocampus is needed for both spatial working and reference memories. Here, using a radial eight-arm maze, we examined how the combined demand on these memories influenced CA1 place cell assemblies while reference memories were partially updated.
Haibing Xu, P. Baracskay, Joseph O’Neill, J. Csicsvari   +3 more
semanticscholar   +1 more source

Columbanus, charisma and the revolt of the monks of Bobbio [PDF]

, 2008
The account of the revolt of the monks of Bobbio against Columbanus’ successor Attala by Jonas of Bobbio gives only some clues as to why it took place, but suggests that Attala was lacking charisma.
Dunn, M.
core   +1 more source