Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 840 for “"Hippocampus"”.
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The hippocampus and its electrographic activity
… investigation of the functions of the hippocampus. Three theories are critically examined : (i) the Douglas ( 196 71 1972) and Kimble (1968) proposal that the hippocampus forms the neural substrate of Pavlovian internal inhibition (hereafter referred to as the inhibitory theory); (ii) …
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Behaviorally-Induced Structural Remodeling of the Hippocampus
… has the potential to disrupt neurogenesis in the hippocampus, which has long been associated with learning and memory. This research proposes to study the effect of γ radiation on mossy fiber growth in the CA3 region of the hippocampus. Research has demonstrated that rats exhibit mossy fiber …
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Reward-related neural activity in ventral hippocampus
기억과 학습에 관여하는 것으로 알려진 해마는 공간적 정보를 처리한다고 알려져 있다. 해마는 해부학적으로 암몬각과 치아이랑으로 이루어져 있으며 특히 암몬각은 4개의 부위로 이루어져 있다. 이 중에 가장 많이 연구된 부분은 CA1이다. 해마는 크게 두 부분으로 나눌 수 있는데 배측해마와 복측해마로 나눌 수 있다. 이 두 부위는 다른 역할을 하는 것으로 알려져 있다. 최근 들어 해마와 보상의 연관성에 대한 연구가 많이 이루어지고 있으나 정확한 연관관계가 밝혀지지 않았다. 그래서 본 실험에서 복측해마에 초점을 맞추어 복측해마의 보상에 …
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Characterizing Cortex-Hippocampus Interactions During Language Processing
… temporal lobe structures, including that of the hippocampus, in language processing, remain largely unknown. In patients with hippocampal damage, language is left largely intact [Vargha-Khadem et al., 1997], suggesting that the hippocampus is likely not necessary for language processing. Recent …
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Memory processing of novel experiences in the hippocampus
The hippocampus is a brain structure critical for learning and memory. With limited resources, memory processing in the hippocampus must involve extraction of useful information from daily experiences. A potential factor in this selection may be novelty of incoming information. To avoid redundancy …
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Low-Intensity Ultrasonic Neuromodulation of the Rat Hippocampus
… electrophysiological recordings from the hippocampus during tFUS in n>100 anesthetized rats. </p> <p>Our main findings are that: (1) high levels of gamma band (30-200 Hz) and theta band (3-10Hz) and low levels of delta band (1-3 Hz) LFP power leading up to tFUS promote successful …
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Acetylcholine Regulation of the Hippocampus and Striatum During Learning
… tested were: (a) cholinergic activity in the hippocampus regulates place learning, (b) cholinergic activity in the striatum regulates response learning and (c) cholinergic activity in one structure regulates competitive interactions with the other. To this end, rats were tested in tasks in …
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Behavioral Alterations in Rats With Lesions in the Hippocampus
Made available in DSpace on 2014-12-08T23:01:39Z (GMT). No. of bitstreams: 1 6801773.pdf: 3486435 bytes, checksum: 7edd12d072ea8d155bea7975b08550c5 (MD5) Previous issue date: 1967
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The virtual hippocampus : spatial common sense for synthetic creatures
Thesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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Modeling the hippocampus : finely controlled memory storage using spiking neurons
The hippocampus, an area in the temporal lobe of the mammalian brain, participates in the storage of personal memories and life events. As such traumatic memories and the consequent symptoms of post-traumatic stress are thought to be stored or at least processedin the hippocampus. While a …
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Effects of HZE Irradiation on Chemical Neurotransmission in Rodent Hippocampus
… HZE radiation induces pronounced deficits in hippocampus dependent learning and memory in rodents. However, the mechanisms underlying these impairments are mostly unknown.</p> <p>Exposure to HZE radiation elevates the level of oxidation, resulting in cell loss, tissue damage and functional …
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Effects of Proton Radiation and Pomegranates on Hippocampus and Behavior
… neurogenesis in the subgranular zone of the hippocampus, a key area for learning and memory. Furthermore, some evidence suggests that compounds found in fruits and vegetables (e.g. polyphenols) may offer some protection against the cellular effects of radiation. Few studies have looked at the …
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Postnatale Entwicklung präsynaptischer Opioidrezeptoren im Hippocampus und Septum der Ratte
… Opioidrezeptoren auf cholinergen Neuronen im Hippocampus und im Septum der Ratte darzustellen. Folgende Fragen waren für die Erarbeitung dieses Zieles von Bedeutung: (1) Wie verläuft die postnatale Entwicklung der Cholinacetyltransferase-Aktivität sowie die Entwicklung der elektrisch …
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Structural and functional heterogeneity of cells in the rat hippocampus
… is encoded in the structure and function of the hippocampus. The laminar structure and organization of information flow are well established. The dentate gyrus (DG) is the initial layer that receives and parses incoming signals. The signal is then transmitted to the CA3 and subsequently the CA1 …
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Organization of spatiotemporal information and relational memory in the hippocampus
This work examines the role of the hippocampus and relational memory in organizing episodic memory during navigation and reconstruction. Navigation is a critical component in most organisms’ survival. Reconstruction, on the other hand, provides an incredibly rich method of evaluating the precise …
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Replay of memories of extended behavior in the rat hippocampus
The hippocampus is a highly conserved structure in the medial temporal lobe of the brain that is known to be critical for spatial learning in rodents, and spatial and episodic memory in humans. During pauses in exploration, ensembles of place cells in the rat hippocampus re-express firing sequences …
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Examining cholinergic fuction in the ventral tegmental area and dorsal hippocampus
… contrast in the circuitry of the VTA) the dorsal hippocampus (dHPC) were assessed by measuring lever pressing and quantifying the expression of immediate early gene (IEG) c-fos as a marker of neural activation. Fos expression was quantified in the VTA and in structures on which VTA activity has …
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Glutamate Receptor-Mediated Taurine Release From The Hippocampus During Oxidative Stress
… regulation in acutely prepared slices of rat hippocampus. Our results indicate that the release of taurine from intracellular stores is critical for isoosmotic volume regulation of the hippocampus exposed to oxidative stress. Further, taurine is lost from hippocampal cells during oxidative …
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