Abstract We spend one-third of our lives in sleep, yet the core function it still remains an enigma due to underlying complex neural processing this altered state consciousness. Sleep requirement varies with phase development. Neonates spent about 85% their time which is polyphasic nature. Gradually, pattern takes shape a monophasic sleep adolescents and adults, changing micro- macroarchitectur...

sleep stages classification is one of the most important methods for diagnosis in psychiatry and neurology. in this paper, a combination of three kinds of classifiers are proposed which classify the eeg signal into five sleep stages including awake, n-rem (non-rapid eye movement) stage 1, n-rem stage 2, n-rem stage 3 and 4 (also called slow wave sleep), and rem. twenty-five all night recordings...

It has become clear that sleep after learning beneficial effects on the later retrieval of newly acquired memories. The neural mechanisms underlying these are becoming increasingly as well, particularly those non-REM sleep. However, much is still unknown about and memory relationship: state or features physiology associate with performance often vary by task experimental design, nature this var...

STUDY OBJECTIVES This study examined effects on adolescent sleep patterns, sleepiness, and circadian phase of a school transition requiring an earlier start. DESIGN AND SETTING Adolescents were evaluated in 9th and 10th grades; school start time in 9th grade was 0825 and in 10th grade was 0720. Assessments at each point included 2 weeks of actigraphy and sleep diaries at home, followed by a 2...

Increasing evidence suggests that cortical dynamics during wake exhibits long-range temporal correlations suitable to integrate inputs over extended periods of time to increase the signal-to-noise ratio in decision making and working memory tasks. Accordingly, sleep has been suggested as a state characterized by a breakdown of long-range correlations. However, detailed measurements of neuronal ...

Since its description in the 19th century, narcolepsy type 1 (NT1) has been considered as a model sleep disorder, and after discovery of rapid eye movement (REM) onset gateway to understanding REM sleep. The that NT1 is caused by hypocretin/orexin deficiency, together with neurochemical studies this system, helped establish how neuropeptide regulates organization wake humans. Current analyses s...

Many experiments have suggested that the adrenergic system is important for arousal and the regulation of sleep/wake states. Electrophysiological studies have found strong correlations between the firing of adrenergic neurons and arousal state. Lesions of adrenergic neurons have been reported to cause changes in sleep/wake regulation, although findings have been variable and sometimes transient...

Sleep stages classification is one of the most important methods for diagnosis in psychiatry and neurology. In this paper, a combination of three kinds of classifiers are proposed which classify the EEG signal into five sleep stages including Awake, N-REM (non-rapid eye movement) stage 1, N-REM stage 2, N-REM stage 3 and 4 (also called Slow Wave Sleep), and REM. Twenty-five all night recordings...

Rapid eye movement (REM) sleep and dreaming may be implicated in cross-night adaptation to emotionally negative events. To evaluate the impact of REM sleep deprivation (REMD) and the presence of dream emotions on a possible emotional adaptation (EA) function, 35 healthy subjects randomly assigned to REMD (n = 17; mean age 26.4 +/- 4.3 years) and control (n = 18; mean age 23.7 +/- 4.4 years) gro...