Grid cell firing may arise from interference of theta frequency membrane potential oscillations in single neurons.

abstract：:The importance of the hippocampal theta oscillation (4-8 Hz) to memory formation has been well-established through studies in animals, prompting researchers to propose comprehensive theories of memory and learning that rely on theta oscillations for integrating information in the hippocampus and neocortex. Yet, empiri...

journal_title：Hippocampus

authors： Lega BC,Jacobs J,Kahana M

更新日期：2012-04-01 00:00:00

abstract：:Previous research has revealed that the functional components of spatial cognition are lateralized in the forebrain of birds, including the hippocampal formation (HF). To investigate how HF cells in the left and right avian brain may differentially participate in representations of space, we recorded single-units from...

journal_title：Hippocampus

authors： Siegel JJ,Nitz D,Bingman VP

更新日期：2006-01-01 00:00:00

abstract：:It is well established that aging is associated with declines in episodic memory. In recent years, an emphasis has emerged on the development of behavioral tasks and the identification of biomarkers that are predictive of cognitive decline in healthy as well as pathological aging. Here, we describe a memory task desig...

journal_title：Hippocampus

authors： Reagh ZM,Roberts JM,Ly M,DiProspero N,Murray E,Yassa MA

更新日期：2014-03-01 00:00:00

abstract：:Accurate and reproducible in vivo measurement of hippocampal volumes using magnetic resonance (MR) imaging is complicated by the morphological complexity of the structure. Additionally, separation of certain parts of the hippocampus from the adjacent brain structures on MR images is sometimes very difficult. These dif...

journal_title：Hippocampus

authors： Pantel J,O'Leary DS,Cretsinger K,Bockholt HJ,Keefe H,Magnotta VA,Andreasen NC

更新日期：2000-01-01 00:00:00

abstract：:We have shown previously that chronic nicotine treatment reverses adult-onset hypothyroidism-induced impairment of late-phase long-term potentiation (L-LTP) in area CA1 of the hippocampus. In the present study, basal and stimulated levels of signaling molecules essential for the expression of L-LTP were determined in ...

journal_title：Hippocampus

authors： Alzoubi KH,Aleisa AM,Alkadhi KA

更新日期：2007-01-01 00:00:00

abstract：:It is argued that while the hippocampus is not vital for all classes of configural learning, it is vital for a specific subclass of configural tasks called "structural learning." The defining feature of structural learning is that in addition to binding stimulus elements to make unique arrays (as in all configural lea...

journal_title：Hippocampus

authors： Aggleton JP,Sanderson DJ,Pearce JM

更新日期：2007-01-01 00:00:00

abstract：:The growth arrest specific 5 (gas5) is a noncoding protein gene that hosts small nucleolar RNAs. Based on the observation that gas5 RNA level in the brain is highest in the hippocampus and remarkably enhanced in aged mice, we tested the hypothesis that gas5 is involved in functions controlled by the hippocampus and kn...

journal_title：Hippocampus

authors： Meier I,Fellini L,Jakovcevski M,Schachner M,Morellini F

更新日期：2010-09-01 00:00:00

abstract：:The perirhinal cortex (PRC) is known to play an important role in object recognition. Little is known, however, regarding the activity of PRC neurons during the presentation of stimuli that are commonly used for recognition memory tasks in rodents, that is, three-dimensional objects. Rats in the present study were exp...

journal_title：Hippocampus

authors： Burke SN,Maurer AP,Hartzell AL,Nematollahi S,Uprety A,Wallace JL,Barnes CA

更新日期：2012-10-01 00:00:00

abstract：:Paired-pulse depression (PPD), a short-term neural plasticity, was studied in hippocampal CA1 of urethane-anesthetized rats in vivo, using field potential recordings and current source density analysis. PPD was robust when an ipsilateral CA3 (iCA3) conditioning pulse of moderate stimulus intensity was followed 30-200 ...

journal_title：Hippocampus

authors： Leung LS,Peloquin P,Canning KJ

更新日期：2008-01-01 00:00:00

abstract：:Structures in the caudal diencephalon including the posterior hypothalamic nucleus, the supramammillary nucleus (SUM) and the nuclei of the mammillary body (MB) occupy a strategic position in the crossroads of ascending and descending traffic between the brainstem and the limbic forebrain (septum/hippocampus). In this...

journal_title：Hippocampus

authors： Kocsis B,Vertes RP

更新日期：1997-01-01 00:00:00

abstract：:A large body of neuroscientific work indicates that exposure to experienced stress causes damage to both cortical and hippocampal cells and results in impairments to cognitive abilities associated with these structures. Similarly, work within the domain of cognitive aging demonstrates that elderly participants who rep...

journal_title：Hippocampus

authors： Marshall AC,Cooper NR,Geeraert N

更新日期：2016-03-01 00:00:00

abstract：:Processing of multimodal sensory information by the morphological subdivisions of the hippocampus and its input and output structures was investigated in unanesthetized rabbits by extracellular recording of neuronal activity. Analysis shows principal differences between CA3 neurons with uniform multimodal, mainly inhi...

journal_title：Hippocampus

authors： Vinogradova OS

更新日期：2001-01-01 00:00:00

abstract：:Kowalczyk et al. (Hippocampus 2014; 24:7-20) were probably the first to conduct a systemic study of posterior hypothalamic area (PHa) theta rhythm in anesthetized rats. They demonstrated that local PHa theta field potentials were tail-pinch resistant and could be generated in urethane-anesthetized rats independently o...

journal_title：Hippocampus

authors： Bocian R,Kłos-Wojtczak P,Caban B,Kowalczyk T,Kaźmierska P,Konopacki J

更新日期：2016-10-01 00:00:00

abstract：:The mechanism supporting the role of the hippocampal formation in novelty detection remains controversial. A comparator function has been variously ascribed to CA1 or subiculum, whereas the theta rhythm has been suggested to separate neural firing into encoding and retrieval phases. We investigated theta phase of firi...

journal_title：Hippocampus

authors： Lever C,Burton S,Jeewajee A,Wills TJ,Cacucci F,Burgess N,O'Keefe J

更新日期：2010-02-01 00:00:00

abstract：:Hippocampal place cells respond heterogeneously to elemental changes of a compound spatial context, suggesting that they form a distributed code of context, whereby context information is shared across a population of neurons. The question arises as to what this distributed code might be useful for. The present study ...

journal_title：Hippocampus

authors： Anderson MI,Killing S,Morris C,O'Donoghue A,Onyiagha D,Stevenson R,Verriotis M,Jeffery KJ

更新日期：2006-01-01 00:00:00

abstract：:The influence of the learning process on the persistence of the newly acquired behavior is relevant both for our knowledge of the learning/memory mechanisms and for the educational policy. However, it is unclear whether during an operant conditioning process with a continuous reinforcement paradigm, individual differe...

journal_title：Hippocampus

authors： Gradari S,Pérez-Domper P,Butler RG,Martínez-Cué C,de Polavieja GG,Trejo JL

更新日期：2016-07-01 00:00:00

abstract：:Hippocampal mossy fibers have long been proposed to impose new patterns to learn onto CA3 neurons during new memory formation. However, inconsistent with this theory, we found in our previous study that mossy fiber stimulation induces only transient changes in CA3 spatial firing in a familiar environment. Here, we tes...

journal_title：Hippocampus

authors： Lee J,Bae C,Lee D,Jung MW

更新日期：2020-07-01 00:00:00

abstract：:Highly synchronized neural firing has been discussed in relation to learning and memory, for instance sharp-wave activity in hippocampus. We were interested to study how a postsynaptic CA1 pyramidal neuron would integrate input of different levels of synchronicity. In previous work using computational modeling we stud...

journal_title：Hippocampus

authors： Tigerholm J,Migliore M,Fransén E

更新日期：2013-01-01 00:00:00

abstract：:The hippocampus creates distinct episodes from highly similar events through a process called pattern separation and can retrieve memories from partial or degraded cues through a process called pattern completion. These processes have been studied in humans using tasks where participants must distinguish studied items...

journal_title：Hippocampus

authors： Molitor RJ,Ko PC,Hussey EP,Ally BA

更新日期：2014-06-01 00:00:00

abstract：:With the aim of establishing a quantitative structural basis for comparative and experimental studies, the volumes of the hippocampal subdivisions and the total number of neurons in each subdivision were estimated in domestic pig brains using modern stereological techniques. In addition to a detailed description of th...

journal_title：Hippocampus

authors： Holm IE,West MJ

更新日期：1994-02-01 00:00:00

abstract：:White matter hyperintensities (WMH) constitute the visible spectrum of cerebral small vessel disease (SVD) markers and are associated with cognitive decline, although they do not fully account for memory decline observed in individuals with SVD. We hypothesize that WMH might exert their effect on memory decline indire...

journal_title：Hippocampus

authors： van Leijsen EMC,Tay J,van Uden IWM,Kooijmans ECM,Bergkamp MI,van der Holst HM,Ghafoorian M,Platel B,Norris DG,Kessels RPC,Markus HS,Tuladhar AM,de Leeuw FE

更新日期：2019-06-01 00:00:00

abstract：:Previous work has shown that immunohistochemical imaging of Fos protein is a reliable marker for changes in activity related to recognition memory in the perirhinal (PRH) cortex of the medial temporal lobe; however, whether PRH Fos expression is necessary for recognition memory had not been established. To investigate...

journal_title：Hippocampus

authors： Seoane A,Tinsley CJ,Brown MW

更新日期：2012-11-01 00:00:00

abstract：:The hippocampal theta rhythm is frequently viewed as a clocking mechanism that coordinates the spiking activity of neurons across the hippocampus to form coherent neural assemblies. Phase precession is a form of temporal coding evidencing this mechanism and is degraded following systemic pharmacological disruption of ...

journal_title：Hippocampus

authors： Venditto SJC,Le B,Newman EL

更新日期：2019-11-01 00:00:00

abstract：:We analyzed intracranial electroencephalographic (EEG) recordings from the medial temporal lobes of 12 epilepsy patients during a continuous word recognition paradigm, contrasting trials of correctly recognized repeated words (hits) and correctly identified new words (correct rejections). Using a wavelet-based analysi...

journal_title：Hippocampus

authors： Mormann F,Fell J,Axmacher N,Weber B,Lehnertz K,Elger CE,Fernández G

更新日期：2005-01-01 00:00:00

abstract：:Throughout the adult life of most mammals, new neurons are continuously generated in the dentate gyrus of the hippocampal formation. Recent work has documented specific cognitive deficits after elimination of adult hippocampal neurogenesis in rodents, suggesting that these neurons may contribute to information process...

journal_title：Hippocampus

authors： Lacefield CO,Itskov V,Reardon T,Hen R,Gordon JA

更新日期：2012-01-01 00:00:00

abstract：:Our lives are a continuous stream of experience. Our episodic memories on the other hand have a definitive beginning, middle, and end. Theories of event segmentation suggest that salient changes in our environment produce event boundaries which partition the past from the present and, as a result, produce discretized ...

journal_title：Hippocampus

authors： Griffiths BJ,Fuentemilla L

更新日期：2020-02-01 00:00:00

abstract：:Fear can be extinguished by repeated exposure to a cue that signals threat. However, extinction does not erase fear, as an extinguished cue presented in a context distinct from that of extinction results in renewed fear of that cue. The hippocampus, which is involved in the formation of contextual representations, is ...

journal_title：Hippocampus

authors： Zelikowsky M,Pham DL,Fanselow MS

更新日期：2012-05-01 00:00:00

abstract：:Lynn Nadel has been a trailblazer in memory research for decades. In just one example, Nadel and Zola-Morgan [Infantile amnesia, In Infant memory, Springer, Boston, MA, 1984, pp. 145-172] were the first to present the provocative notion that the extended development of the hippocampus may underlie the period of infant...

journal_title：Hippocampus

authors： Edgin JO,Liu Y,Hughes K,Spanò G,Clark CAC

更新日期：2020-08-01 00:00:00

abstract：:In the present study, 93 cells in the superior colliculus (SC) were recorded extracellularly during the simultaneous occurrence of spontaneous theta field activity, sensory-induced (tail pinch) theta field activity, and large amplitude irregular (LIA) field activity, recorded from an electrode located in the stratum m...

journal_title：Hippocampus

authors： Natsume K,Hallworth NE,Szgatti TL,Bland BH

更新日期：1999-01-01 00:00:00

abstract：:Neurons in the supramammillary nucleus (SUM) of urethane-anesthetized rats fire rhythmically in synchrony with hippocampal theta rhythm. As these neurons project to the septum and hippocampus, it is generally assumed that their role is to mediate ascending activation, leading to the hippocampal theta rhythm. However, ...

journal_title：Hippocampus

authors： Kocsis B,Kaminski M

更新日期：2006-01-01 00:00:00