A Study On The Cognitive And Physiological Aspects Of The Hippocampus

921 WordsNov 22, 20154 Pages
Habits and general knowledge are vital for survival, as both sleep and recollection of events: the study of how both are combined is of distinct interest. Tests demonstrate that the hippocampus is the main cortical region active during memory tasks, as well as during states of unconsciousness. It is suggested that memories are somehow integrated and reverberated during the sleep state. Findings like these lead to a greater interest in studying the hippocampus, specifically during sleep. Many tests have been administered attempting to decode memory consolidation by examining the behavioral and physiological aspects of the hippocampus’ roles and functions. This review examines different methods conducted as well as possible analyses that can be done to determine the role of hippocampal function in memory during sleep. Sleep Sleep is a natural state of unconsciousness characterized by unresponsiveness to stimuli, as well as an apparent consolidation of memories10. It is an actively regulated process in which neuron activity is reorganized5. Sleep is divided into two phases, Rapid Eye Motion (REM) and Non-Rapid Eye Motion (NREM) (also known as slow wave sleep (SWS)) 6.SWS is further composed of 4 levels of sleep. These levels produce theta and delta wavelengths on an electroencephalogram (EEG). Furthermore, the waves increase in amplitude and decrease in frequency with the succession of each stage 10. These stages dominate the earlier part of the sleep period then decrease in
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