Spontaneous generalization - something
Kevin S. LaBar Professor of Psychology and Neuroscience My research focuses on understanding how emotional events modulate cognitive processes in the human brain. We aim to identify brain regions that encode the emotional properties of sensory stimuli, and to show how these regions interact with neural systems supporting social cognition, executive control, and learning and memory. To achieve this goal, we use a variety of cognitive neuroscience techniques in human subject populations. These include psychophysiological monitoring, functional magnetic resonance imaging fMRI , machine learning, and behavioral studies in healthy adults as well as psychiatric patients. This integrative approach capitalizes on recent advances in the field and may lead to new insights into cognitive-emotional interactions in the brain. spontaneous generalization.
Spontaneous generalization Video
Stimulus Discrimination TrainingLearning motor tasks involves many brain regions including motor cortex, basal ganglia, and hippocampus DebasBrain.
While some improvement in sequential motor tasks may arise from the hippocampal contribution during sleep KingSleepingaimprovement in motor adaptation tasks does not involve the hippocampus DebasBrain. Sleep has also been shown to spontaneous generalization interference between procedural and declarative tasks BrownOff-Linesuggesting a role for sleep in preventing interference during consolidation of different memory types.
Introduction
Different sleep stages have distinct roles in memory consolidation. Non-rapid eye movement NREM sleep is strongly associated with consolidation of declarative memory DiekelmannSleep; walkerovernight.
In contrast, rapid eye movement REM sleep promotes the organization of internal representations dumaysleep; haskinsperirhinal; baderrecognition; tibonassociative gomeznaps; wagnersleep; smithingestion; djonlagicsleep; cairem; LewisHow; durrantschemaand protects against interference between memories McDevittREM. This collection of evidence suggests NREM is associated with transfer and storage of recent experiences spontaneous generalization REM is associated with organizing internal representations.
Related Research
This also coincides with NREM generaliization more during early parts of night sleep, when transfer occurs, followed by REM sleep spontaneous generalization predominately during the later part of night sleep, when integration and higher order memory manipulations occur. This is illustrated in Fig. Note that activity during REM has been observed to be similar to that during waking experiences.
The first evidence of replay in the hippocampus was observed in the firing patterns of pairs of neurons PavlidesInfluences; WilsonReactivation. Since place cells are known to spike when the animal is in a particular location OKeefeTheit is possible to study neurons that are active spontaneous generalization both sleep and article source waking experiences.
A strong correlation was observed between the firing rates of place cell neurons during sleep to those observed during the waking task PavlidesInfluences; WilsonReactivation.
Replay of recent memories in hippocampus decays over time, with the progressive reduction of correlations in the firing of neurons with recent experience over several sleep cycles nadasdyreplay. The decline in replay of recent experiences was shown to occur relatively fast in hippocampus and prefrontal cortex, i. The decline spontaneous generalization replay in recent experiences during sleep is followed by the resetting of hippocampal excitability during REM sleep grosmarkneuronwhich may allow the hippocampus to encode spontaneous generalization memories.]
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