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Showing 1,231 to 1,241 of 1,241 results Save | Export
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Barco, Angel; Kandel, Eric R.; Gordon, Barbara; Lickey, Marvin E.; Suzuki, Seigo; Pham, Tony A.; Graham, Sarah J. – Learning & Memory, 2004
The adult cerebral cortex can adapt to environmental change. Using monocular deprivation as a paradigm, we find that rapid experience-dependent plasticity exists even in the mature primary visual cortex. However, adult cortical plasticity differs from developmental plasticity in two important ways. First, the effect of adult, but not juvenile…
Descriptors: Age Differences, Animals, Visual Stimuli, Science Experiments
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Hernandez, Pepe J.; Kelley, Ann E. – Learning & Memory, 2004
Recent evidence indicates that certain forms of memory, upon recall, may return to a labile state requiring the synthesis of new proteins in order to preserve or reconsolidate the original memory trace. While the initial consolidation of "instrumental memories" has been shown to require de novo protein synthesis in the nucleus accumbens, it is not…
Descriptors: Reinforcement, Long Term Memory, Contingency Management, Behavior Modification
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Bonsi, Paola; De Persis, Cristiano; Calabresi, Paolo; Bernardi, Giorgio; Pisani, Antonio – Learning & Memory, 2004
Current evidence appoints a central role to cholinergic interneurons in modulating striatal function. Recently, a long-term potentiation (LTP) of synaptic transmission has been reported to occur in these neurons. The relationship between the pattern of cortico/thalamostriatal fibers stimulation, the consequent changes in the intracellular calcium…
Descriptors: Logical Thinking, Stimulation, Animals, Experiments
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Messaoudi, Belkacem; Granjon, Lionel; Mouly, Anne-Marie; Sevelinges, Yannick; Gervais, Remi – Learning & Memory, 2004
The widely used Pavlovian fear-conditioning paradigms used for studying the neurobiology of learning and memory have mainly used auditory cues as conditioned stimuli (CS). The present work assessed the neural network involved in olfactory fear conditioning, using olfactory bulb stimulation-induced field potential signal (EFP) as a marker of…
Descriptors: Classical Conditioning, Animals, Auditory Stimuli, Cues
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Kamprath, Kornelia; Wotjak, Carsten T. – Learning & Memory, 2004
Freezing to a tone following auditory fear conditioning is commonly considered as a measure of the strength of the tone-shock association. The decrease in freezing on repeated nonreinforced tone presentation following conditioning, in turn, is attributed to the formation of an inhibitory association between tone and shock that leads to a…
Descriptors: Habituation, Memory, Conditioning, Fear
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Straub, Volko A.; Styles, Benjamin J.; Ireland, Julie S.; O'Shea, Michael; Benjamin, Paul R. – Learning & Memory, 2004
Learning to associate a conditioned (CS) and unconditioned stimulus (US) results in changes in the processing of CS information. Here, we address directly the question whether chemical appetitive conditioning of "Lymnaea" feeding behavior involves changes in the peripheral and/or central processing of the CS by using extracellular recording…
Descriptors: Conditioning, Neurology, Neurolinguistics, Neuropsychology
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Levy, Daniel A.; Squire, Larry R.; Hopkins, Ramona O. – Learning & Memory, 2004
In humans, impaired recognition memory following lesions thought to be limited to the hippocampal region has been demonstrated for a wide variety of tasks. However, the importance of the human hippocampus for olfactory recognition memory has scarcely been explored. We evaluated the ability of memory-impaired patients with damage thought to be…
Descriptors: Patients, Recognition (Psychology), Integrity, Neurological Impairments
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Metherate, Raju – Learning & Memory, 2004
Acetylcholine release in sensory neocortex contributes to higher-order sensory function, in part by activating nicotinic acetylcholine receptors (nAChRs). Molecular studies have revealed a bewildering array of nAChR subtypes and cellular actions; however, there is some consensus emerging about the major nAChR subtypes and their functions in…
Descriptors: Auditory Perception, Stimulation, Biochemistry, Neurology
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Benard, Julie; Giurfa, Martin – Learning & Memory, 2004
We asked whether honeybees, "Apis mellifera," could solve a transitive inference problem. Individual free-flying bees were conditioned with four overlapping premise pairs of five visual patterns in a multiple discrimination task (A+ vs. B-, B+ vs. C-, C+ vs. D-, D+ vs. E-, where + and - indicate sucrose reward or absence of it,…
Descriptors: Stimuli, Rewards, Inferences, Memory
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Boyd, Lara A.; Winstein, Carolee J. – Learning & Memory, 2004
Despite their purported neuroanatomic and functional isolation, empirical evidence suggests that sometimes conscious explicit processes can influence implicit motor skill learning. Our goal was to determine if the provision of explicit information affected implicit motor-sequence learning after damage to the basal ganglia. Individuals with stroke…
Descriptors: Neurological Organization, Biochemistry, Cognitive Processes, Short Term Memory
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Battaglia, Francesco P.; Sutherland, Gary R.; McNaughton, Bruce L. – Learning & Memory, 2004
The sleeping neocortex shows nested oscillatory activity in different frequency ranges, characterized by fluctuations between "up-states" and "down-states." High-density neuronal ensemble recordings in rats now reveal the interaction between synchronized activity in the hippocampus and neocortex: Electroencephalographic sharp…
Descriptors: Long Term Memory, Animals, Sample Size, Intervals
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