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K-Complex: Electroencephalography, Sleep, Non-Rapid Eye Movement Sleep, Memory Consolidation, Alfred Lee Loomis, Sleep Spindle, Delta Wave
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(Buch) |
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| Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. A K-complex is an
electroencephalography (EEG) waveform that occurs during stage 2 of NREM
sleep. It is the "largest event in healthy human EEG". They are more
frequent in the first sleep cycles of sleep. K-complexes have two
proposed functions. First, suppressing cortical arousal in response to
stimuli that the sleeping brain evaluates not to signal danger, and
second, aiding sleep-based memory consolidation. The K-complex was
discovered in 1937 in the private laboratories of Alfred Lee Loomis.
They are present in the sleep of 5-month-old infants, and develop with
age. Between 3 and 5 years of age a faster negative component appears
and continues to increase until adolescence. Another change occurs in
adults: before 30 years of age their frequency and amplitude is higher
than in older people particularly those over 50 years of age. This
parallels the decrease in other components of sleep such as sleep
spindle density and delta power. |
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i.d.R. innert 7-14 Tagen versandfertig
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