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Parahippocampal and retrosplenial connections of rat posterior parietal cortex
(Journal article; Peer reviewed, 2017)The posterior parietal cortex has been implicated in spatial functions, including navigation. The hippocampal and parahippocampal region and the retrosplenial cortex are crucially involved in navigational processes and ... -
Parieto-frontal architecture, connectivity and behavioral representations in rodents
(Doctoral theses at NTNU;2019:348, Doctoral thesis, 2019)The posterior parietal cortex (PPC) and frontal motor cortices are important for a variety of cognitive processes including sensorimotor integration, decision-making, planning and execution goal-directed actions. Across ... -
Parvalbumin and Somatostatin Interneurons Control Different Space-Coding Networks in the Medial Entorhinal Cortex
(Journal article; Peer reviewed, 2017)The medial entorhinal cortex (MEC) contains several discrete classes of GABAergic interneurons, but their specific contributions to spatial pattern formation in this area remain elusive. We employed a pharmacogenetic ... -
Past, present and future of zebrafish in epilepsy research
(Journal article; Peer reviewed, 2021)Animal models contribute greatly to our understanding of brain development and function as well as its dysfunction in neurological diseases. Epilepsy research is a very good example of how animal models can provide us with ... -
Path integral methods for the dynamics of stochastic and disordered systems
(Journal article; Peer reviewed, 2017)We review some of the techniques used to study the dynamics of disordered systems subject to both quenched and fast (thermal) noise. Starting from the Martin–Siggia–Rose/Janssen–De Dominicis–Peliti path integral formalism ... -
Path integration in place cells of developing rats
(Journal article; Peer reviewed, 2018)Place cells in the hippocampus and grid cells in the medial entorhinal cortex rely on self-motion information and path integration for spatially confined firing. Place cells can be observed in young rats as soon as they ... -
Perception and the cognitive map - Deriving a stable world from visual inputs
(Doctoral theses at NTNU;2020:32, Doctoral thesis, 2020)Norsk sammendrag Hjernen skaper stabile og sammenhengende representasjoner av verden fra omskiftelige perseptuelle input. Denne prosessen involverer et omfattende nettverk i hjernen, fra de tidlige synssentrene på lavt ... -
Perineuronal nets stabilize the grid cell network
(Peer reviewed; Journal article, 2021)Grid cells are part of a widespread network which supports navigation and spatial memory. Stable grid patterns appear late in development, in concert with extracellular matrix aggregates termed perineuronal nets (PNNs) ... -
Perirhinal firing patterns are sustained across large spatial segments of the task environment
(Journal article; Peer reviewed, 2017)Spatial navigation and memory depend on the neural coding of an organism’s location. Fine-grained coding of location is thought to depend on the hippocampus. Likewise, animals benefit from knowledge parsing their environment ... -
Phase transitions and asymmetry between signal comprehension and production in biological communication
(Journal article; Peer reviewed, 2019)We introduce a model for collective information acquisition from the environment, in a biological population. In this model, individuals can make noisy observations of the environment, and communicate their observation by ... -
Physical navigation through a conceptual space
(Master thesis, 2019)Navigation of a physical space is facilitated by spatially tuned neurons in the hippocampal formation. These cells are thought to instantiate a cognitive map, affording an animal with an internal representation of its ... -
Physiological properties of neurons in bat entorhinal cortex exhibit an inverse gradient along the dorsal–ventral axis compared to entorhinal neurons in rat
(Journal article; Peer reviewed, 2016)Medial entorhinal cortex (MEC) grid cells exhibit firing fields spread across the environment on the vertices of a regular tessellating triangular grid. In rodents, the size of the firing fields and the spacing between the ... -
Place Cell Rate Remapping by CA3 Recurrent Collaterals
(Journal article; Peer reviewed, 2014)Episodic-like memory is thought to be supported by attractor dynamics in the hippocampus. A possible neural substrate for this memory mechanism is rate remapping, in which the spatial map of place cells encodes contextual ... -
Place cells in the hippocampus: Eleven maps for eleven rooms
(Journal article; Peer reviewed, 2014)The contribution of hippocampal circuits to high-capacity episodic memory is often attributed to the large number of orthogonal activity patterns that may be stored in these networks. Evidence for high-capacity storage in ... -
Place cells, grid cells, and memory
(Journal article; Peer reviewed, 2015)The hippocampal system is critical for storage and retrieval of declarative memories, including memories for locations and events that take place at those locations. Spatial memories place high demands on capacity. Memories ... -
Placental inflammation by HMGB1 activation of TLR4 at the syncytium
(Peer reviewed; Journal article, 2018)Introduction: Normal pregnancy is characterized by an elevated inflammatory state involving the placenta. The placental inflammation is further increased in preeclampsia, resulting in release of harmful danger signals to ... -
Placental inflammation by HMGB1 activation of TLR4 at the syncytium
(Peer reviewed; Journal article, 2018)Normal pregnancy is characterized by an elevated inflammatory state involving the placenta. The placental inflammation is further increased in preeclampsia, resulting in release of harmful danger signals to the maternal ... -
Plasticity of hippocampal memories in humans
(Journal article; Peer reviewed, 2017)The human hippocampus is a brain region that supports episodic and spatial memory. Recent experiments have drawn on animal research and computational modelling to reveal how the unique computations and representations of ... -
Posterior parietal cortex
(Journal article; Peer reviewed, 2017)The posterior parietal cortex, along with temporal and prefrontal cortices, is one of the three major associative regions in the cortex of the mammalian brain. It is situated between the visual cortex at the caudal pole ... -
Posterior parietal cortex of the rat: Architectural delineation and thalamic differentiation
(Journal article; Peer reviewed, 2016)This study refines the characterization of the rat parietal cortical domain in terms of cyto- and chemoarchitecture as well as thalamic connectivity. We recognize three subdivisions of the posterior parietal cortex (PPC), ...