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 257 for “"amygdala"”.
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Amygdala circuits underlying valence-specific behaviors
… predetermined neural circuits in the brain. The amygdala is an important mammalian brain region that is activated by negative and positive stimuli and mediates negative and positive valence-related behaviors. The current prevailing circuit model of the amygdala mainly considers negative behaviors …
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Organisation of Glutamatergic Inputs to Central amygdala
… its clinical management challenging. Central amygdala (CeA) is a key neural substrate that contributes in the control of the pain response and modulates the affective-motivational component of pain. It is known that PKCδ (+) neurons in latero-capsular region of CeA (CeLC) is a dominant direct …
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The role of the amygdala in dreaming
… studies have strongly implicated the basolateral amygdala in dreaming (e.g. Maquet et al., 1996). Various neuropsychological dream theorists (Domhoff, 2001; Hobson, Pace-Schott & Stickgold, 2000; Revonsuo, 2000) propose central roles for the amygdala in dreaming (particularly in the generation of …
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Associative learning in auditory thalamus and amygdala
… nucleus of the thalamus (MGN) and basolateral amygdala (BLA) play in the formation of associative learning, many open questions remain. MGN is often thought of as only contributing relayed sensory information, and BLA the primary site of importance for the formation of associative learning, …
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The amygdala in value-guided decision making
The amygdala is a structure well known for its role in fear and reward learning, but how these mechanisms are used for decision-making is not well understood. Decision-making involves the rapid updating of cue associations as well as the encoding of a value currency, both processes in which the …
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Dopaminergic modulation of basolateral amygdala for fear extinction
… learning, a new memory is formed in basolateral amygdala (BLA) reward neurons, which inhibits the BLA fear memory. However, the neurological nature of the teaching signal that instructs the formation of fear extinction memory in BLA reward neurons is unknown. Recently work has identified a …
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Space and Value in the Primate Amygdala and Basal Forebrain
… Neuroscientists have long appreciated that the amygdala mediates spatially non-specific emotional responses, but it remains unclear whether the amygdala links motivational and spatial representations in a way that may be important for the emotional-guidance of attention. To test whether amygdala …
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HORROR-EVOKED AROUSAL AND AMYGDALA BIAS OF THE MEDIAL TEMPORAL LOBE
… in the medial temporal lobe (MTL), including the amygdala sub-nuclei areas of the basolateral and the central-medial amygdala, the anterior and posterior hippocampus, and the perirhinal cortex. We present neural univariate signals of these regions of interest (ROIs), and functional connectivity …
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Neurotransmitter Modulation of Alcohol-Induced GABAergic Signaling in the Central Amygdala
… affective states during withdrawal. The central amygdala (CeA), a predominantly GABAergic structure that integrates stress and reward signals, plays a critical role in the emotional and motivational processes that sustain alcohol dependence. Although pharmacotherapies targeting stress-related …
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CELL TYPE-SPECIFIC EFFECTS OF OPIOID DEPENDENCE ON CENTRAL AMYGDALA NEURONS
… for pain, such as the central nucleus of the amygdala (CeA), are impacted by opioid dependence. Growing evidence reveals that the CeA comprises multiple functional cell-types. While decades of research implicate the CeA in opioid withdrawal, the cell type-identity of the affected CeA cells has …
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Zur pathophysiologischen Bedeutung der Amygdala bei chronischer Schizophrenie : eine magnetresonanzvolumetrische Untersuchung
… zwischen Abnormalitäten des Hippocampus und der Amygdala bestätigen. Der am meisten vertretene Befund eines verkleinerten Hippocampus, findet sich in unserer Studie mit eindeutiger Signifikanz. Die Amygdalaverkleinerung zeigt sich tendenziell und könnte bei einer größeren Studiengruppe durchaus …
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Representations of Relative Value Coding in the Orbitofrontal Cortex and Amygdala
… if, in different contexts, neurons in the amygdala and orbitofrontal cortex (OFC) indeed rescale their calculation of the motivational significance of stimuli that predict rewards. We used a "contrast revaluation" task in which the reward associated with one stimulus is held constant while …
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5,7-dihydroxytryptamine lesions of the rat amygdala increase learned fear behavior.
The lateral nucleus of the amygdala (LA) plays a key role in learned fear and anxiety, while dysfunctional LA circuitry is implicated in fear and anxiety psychopathologies. The LA is under inhibitory modulation and prone to hyperexcitation with inhibitory release. This hyperexcitation can result in …
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Influence of Sex, Adolescence, and Aging on the Rat Basolateral Amygdala
… adolescence, and aging on the rat basolateral amygdala. Study one was a neuroanatomical Golgi study that examined dendritic material in adult and aged male and female basolateral nucleus, and found significant age-related increases in dendritic material in both sexes, along with a sex …
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The molecular substrates of second-order conditioned fear in the basolateral amygdala
… require neuronal activity in the basolateral amygdala complex (BLA), including activation of NMDA receptors, for their encoding, and both require CaMK signalling, gene expression and DNA methylation for their consolidation. However, de novo protein synthesis is required for consolidation of …
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Dreaming in Urbach-Wiethe patients the effect of amygdala damage on dreaming
… of literature looking at the effect of damaged amygdalae on dreaming and dream content. Of the many functions, the amygdala is heavily involved in processing emotional stimuli and fear conditioning. In Revonsuo’s threat simulation theory (TST), the amygdala plays an important role in the threat …
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Role of CGRP in the amygdala in pain-related synaptic plasticity and behavior
… the emotional evaluation of sensory stimuli, the amygdala has been suggested as a neural substrate of the reciprocal relationship between pain and affect. Nociceptive information reaches the central nucleus of the amygdala (CeA) through the spino-parabrachio-amygdaloid pain pathway and …
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Effects of developmental PCB exposure on audiogenic and amygdala kindling models of seizure
… outside the auditory brainstem using the amygdala kindling model (a well characterized model of temporal lobe epilepsy in rodents). Two males from each of the litters described above were implanted bilaterally with electrodes in the basolateral amygdala as adults. For each animal a number …
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