Information processing during sleep

Altered Information Processing during Slow Wave Sleep in Rats

Neurophysiological studies have indicated that the transfer of sensory information through the specific nuclei of the thalamus depends on the sleep-wake state. The transfer-ratio concept of Coenen and Vendrik (1972) states that this ratio between thalamic input from the sensory organs and thalamic output to the cortex is equal to 1.0 during wakefulness, whereas it is reduced to 0.4 during slow ...

Acquisition and Processing of Information During States of REM Sleep and Slow-Wave Sleep

Hippocampal information processing across sleep/wake cycles

According to a two-stage memory consolidation model, during waking theta states, afferent activity from the neocortex to the hippocampus induces transient synaptic modification in the hippocampus, where the information is deposited as a labile form of memory trace. During subsequent sharp-wave ripples (SPW-Rs), the newly acquired hippocampal information is transferred to the neocortex and store...

ERPs studies of cognitive processing during sleep.

In the last few decades, several works on cognitive processing during sleep have emerged. The study of cognitive processing with event related potentials (ERPs) during sleep is a topic of great interest, since ERPs allow the study of stimulation with passive paradigms (without conscious response or behavioural response), opening multiple research possibilities during different sleep phases. We ...

Cognitive processing during the transition to sleep.

Dramatic physiological and behavioural changes occur during the transition from wakefulness to sleep. The process is regarded as a grey area of consciousness between attentive wakefulness and slow wave sleep. Although there is evidence of neurophysiological integration decay as signalled by sleep EEG elements, changes in power spectra and coherence, thalamocortical connectivity in fMRI, and sin...