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Direct linkGodaux, Emile; Ris, Laurence; Capron, Brigitte; Sindic, Christian – Learning & Memory, 2006
In area CA1 of hippocampal slices which are allowed to recover from slicing "in interface" and where recordings are carried out in interface, a single 1-sec train of 100-Hz stimulation triggers a short-lasting long-term potentiation (S-LTP), which lasts 1-2 h, whereas multiple 1-sec trains induce a long-lasting LTP (L-LTP), which lasts several…
Descriptors: Data Analysis, Animals, Models, Memory
Khoutorsky, Arkady; Spira, Micha E. – Learning & Memory, 2005
"Aplysia" motoneurons cocultured with a presynaptic sensory neuron exhibit homosynaptic depression when stimulated at low frequencies. A single bath application of serotonin (5HT) leads within seconds to facilitation of the depressed synapse. The facilitation is attributed to mobilization of neurotransmitter-containing vesicles from a…
Descriptors: Depression (Psychology), Models, Stimuli, Experiments
Steward, Oswald; Huang, Fen; Guzowski, John F. – Learning & Memory, 2007
Stimulation paradigms that induce perforant path long-term potentiation (LTP) initiate phosphorylation of ERK1/2 and induce expression of a variety of immediate early genes (IEGs). These events are thought to be critical components of the mechanism for establishing the changes in synaptic efficacy that endure for hours or longer. Here we show that…
Descriptors: Stimulation, Seizures, Animals, Behavior Modification
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
Myers, Karyn M.; Davis, Michael – Learning & Memory, 2004
The neural mechanisms of fear suppression most commonly are studied through the use of extinction, a behavioral procedure in which a feared stimulus (i.e., one previously paired with shock) is nonreinforced repeatedly, leading to a reduction or elimination of the fear response. Although extinction is perhaps the most convenient index of fear…
Descriptors: Inhibition, Stimuli, Models, Fear
Daumas, Stephanie; Halley, Helene; Frances, Bernard; Lassalle, Jean-Michel – Learning & Memory, 2005
Studies on human and animals shed light on the unique hippocampus contributions to relational memory. However, the particular role of each hippocampal subregion in memory processing is still not clear. Hippocampal computational models and theories have emphasized a unique function in memory for each hippocampal subregion, with the CA3 area acting…
Descriptors: Conditioning, Fear, Recognition (Psychology), Animals
