نتایج جستجو برای: sleep stages classification

تعداد نتایج: 773664  

Journal: :Journal of neuroscience methods 2015
Kun-Chan Lan Da-Wei Chang Chih-En Kuo Ming-Zhi Wei Yu-Hung Li Fu-Zen Shaw Sheng-Fu Liang

BACKGROUND Recently, there has been increasing interest in the development of wireless home sleep staging systems that allow the patient to be monitored remotely while remaining in the comfort of their home. However, transmitting large amount of Polysomnography (PSG) data over the Internet is an important issue needed to be considered. In this work, we aim to reduce the amount of PSG data which...

2017
Roy Cox Anna C. Schapiro Dara S. Manoach Robert Stickgold

Sleep spindles are transient oscillatory waveforms that occur during non-rapid eye movement (NREM) sleep across widespread cortical areas. In humans, spindles can be classified as either slow or fast, but large individual differences in spindle frequency as well as methodological difficulties have hindered progress towards understanding their function. Using two nights of high-density electroen...

Journal: :Acta neurobiologiae experimentalis 1996
D Pracka T Pracki

In this study cyclic changes of human sleep structure were examined. For whole-night polysomnograms of 35 healthy volunteers of both sexes, manual hypnograms were created and divided into NREM-REM cycles. EEG signals from C3-A2 derivation were analysed by computer using a Fast Fourier Transform (FFT). For consecutive NREM-REM cycles of individual sleep stages, EEG power density contents for del...

Journal: :Computers and biomedical research, an international journal 1998
C Richard R Lengelle

Automated detection of waveforms such as delta and K-complex in the EEG is an important component of sleep stage monitoring. The K-complex is a key feature that contributes to sleep stages assessment. However, its automated detection is still difficult due to the stochastic nature of the EEG. In this paper, we propose a detection structure which can be interpreted as joint linear filtering oper...

Journal: :Biological psychiatry 1991
S F Taylor R Tandon J E Shipley A S Eiser

To study the effects of neuroleptic therapy on sleep EEG variables in schizophrenia, as well as the clinical correlates of these variables, we performed polysomnographic (PSG) studies on 14 schizophrenic inpatients before and during neuroleptic therapy. Sleep continuity measures improved after 3 weeks of neuroleptic therapy, showing decreased sleep latency and improved sleep efficiency. REM lat...

Journal: :Physiology & behavior 1977
T Kukorelli G Juhász

The influence of afferent impulses of intestinal origin on the sleep stages was studied in fed and starved cats. Low-frequency electrical stimulation of the mucosal surface in a small intestinal fistula reduced the latency of sleep onset. The number of slow wave sleep episodes decreased, but their mean duration increased during stimulation. Conversely, the number of paradoxical sleep episodes i...

Journal: :Journal of science and medicine in sport 2018
Melanie Knufinke Arne Nieuwenhuys Sabine A E Geurts Els I S Møst Kamiel Maase Maarten H Moen Anton M L Coenen Michiel A J Kompier

OBJECTIVES Sleep is essential for recovery and performance in elite athletes. While it is generally assumed that exercise benefits sleep, high training load may jeopardize sleep and hence limit adequate recovery. To examine this, the current study assessed objective sleep quantity and sleep stage distributions in elite athletes and calculated their association with perceived training load. DE...

Journal: :Journal of Biological Physics 2008
Eckehard Olbrich Peter Achermann

The sleep electroencephalogram (EEG) is characterized by typical oscillatory patterns such as sleep spindles and slow waves. Recently, we proposed a method to detect and analyze these patterns using linear autoregressive models for short (approximately 1 s) data segments. We analyzed the temporal organization of sleep spindles and discuss to what extent the observed interevent intervals corresp...

2004
A D MORGAN G B RHIND J J CONNAUGHTON J R CATTERALL C M SHAPIRO N J DOUGLAS

Breathing patterns early and late in the night, at the same sleep stage, were compared in six healthy subjects and 15 adults with nocturnal asthma, to try to identify changes of overnight bronchoconstriction, and breathing patterns at different sleep stages, to see whether there were changes related to sleep stages that were indicative of bronchoconstriction. Despite an average 31% fall in FEV1...

Journal: :Neuroscience letters 2003
Olga Martynova Jarkko Kirjavainen Marie Cheour

Event-related potentials were recorded from sleeping newborns to compare amplitudes and latencies of mismatch negativity (MMN) and late discriminative negativity (LDN) in active and quiet sleep stages. MMN and LDN were obtained in response to changes in semi-synthesized vowels from 20 healthy newborn infants. MMN and LDN responses were significant for both active and quiet sleep. The amplitude ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید