Respiratory and Cardiac Activity During Sleep Onset

Sleep Apnea ◽  
2000 ◽  
pp. 357-374 ◽  
Keyword(s):  
Sleep Onset ◽  
Cardiac Activity

Effects of bright light and melatonin on sleep propensity, temperature, and cardiac activity at night

2001 ◽  
Vol 91 (3) ◽  
pp. 1214-1222 ◽  
Author(s):  
Helen J. Burgess ◽  
Tracey Sletten ◽  
Natasha Savic ◽  
Saul S. Gilbert ◽  
Drew Dawson
Keyword(s):  
Sleep Onset ◽  
Cardiac Activity ◽  
Bright Light ◽  
Parasympathetic Activity ◽  
Sleep Onset Latency ◽  
Autonomic Activity ◽  
Sinus Arrhythmia ◽  
Wake Time ◽  
Cardiac Parasympathetic Activity ◽  
Peripheral Temperature

Melatonin increases sleepiness, decreases core temperature, and increases peripheral temperature in humans. Melatonin may produce these effects by activating peripheral receptors or altering autonomic activity. The latter hypothesis was investigated in 16 supine subjects. Three conditions were created by using bright light and exogenous melatonin: normal endogenous, suppressed, and pharmacological melatonin levels. Data during wakefulness from 1.5 h before to 2.5 h after each subject's estimated melatonin onset (wake time + 14 h) were analyzed. Respiratory sinus arrhythmia (cardiac parasympathetic activity) and preejection period (cardiac sympathetic activity) did not vary among conditions. Pharmacological melatonin levels significantly decreased systolic blood pressure [5.75 ± 1.65 (SE) mmHg] but did not significantly change heart rate. Suppressed melatonin significantly increased rectal temperature (0.27 ± 0.06°C), decreased foot temperature (1.98 ± 0.70°C), and increased sleep onset latency (5.53 ± 1.87 min). Thus melatonin does not significantly alter cardiac autonomic activity and instead may bind to peripheral receptors in the vasculature and heart. Furthermore, increases in cardiac parasympathetic activity before normal nighttime sleep cannot be attributed to the concomitant increase in endogenous melatonin.

The influence of sleep onset on the diurnal variation in cardiac activity and cardiac control

2003 ◽  
Vol 12 (3) ◽  
pp. 213-221 ◽  
Author(s):  
Melinda Carrington ◽  
Michelle Walsh ◽  
Thalia Stambas ◽  
Jan Kleiman ◽  
John Trinder
Keyword(s):  
Diurnal Variation ◽  
Sleep Onset ◽  
Cardiac Activity ◽  
Cardiac Control

Cardiac activity during sleep onset

1999 ◽  
Vol 36 (3) ◽  
pp. 298-306 ◽  
Author(s):  
HELEN J. BURGESS ◽  
JAN KLEIMAN ◽  
JOHN TRINDER
Keyword(s):  
Sleep Onset ◽  
Cardiac Activity

Spectral and Topographic Microstructure of Brain Alpha Activity During Drowsiness at Sleep Onset and REM Sleep

2000 ◽  
Vol 14 (3) ◽  
pp. 151-158 ◽  
Author(s):  
José Luis Cantero ◽  
Mercedes Atienza
Keyword(s):  
Rem Sleep ◽  
Spectral Component ◽  
Sleep Onset ◽  
Quantitative Information ◽  
Maximum Energy ◽  
Alpha Activity ◽  
The Other ◽  
Classification Algorithms ◽  
Microstructural Properties ◽  
Brain States

Abstract High-resolution frequency methods were used to describe the spectral and topographic microstructure of human spontaneous alpha activity in the drowsiness (DR) period at sleep onset and during REM sleep. Electroencephalographic (EEG), electrooculographic (EOG), and electromyographic (EMG) measurements were obtained during sleep in 10 healthy volunteer subjects. Spectral microstructure of alpha activity during DR showed a significant maximum power with respect to REM-alpha bursts for the components in the 9.7-10.9 Hz range, whereas REM-alpha bursts reached their maximum statistical differentiation from the sleep onset alpha activity at the components between 7.8 and 8.6 Hz. Furthermore, the maximum energy over occipital regions appeared in a different spectral component in each brain activation state, namely, 10.1 Hz in drowsiness and 8.6 Hz in REM sleep. These results provide quantitative information for differentiating the drowsiness alpha activity and REM-alpha by studying their microstructural properties. On the other hand, these data suggest that the spectral microstructure of alpha activity during sleep onset and REM sleep could be a useful index to implement in automatic classification algorithms in order to improve the differentiation between the two brain states.

The impact of social defeat on cardiac activity in rats

1998 ◽  
Author(s):  
A. Sgoifo ◽  
S. F. de Boer ◽  
B. Buwalda ◽  
F. Maes ◽  
J. M. Koolhaas
Keyword(s):  
Cardiac Activity ◽  
Social Defeat ◽  
The Impact

Maternal metabolism in the fasting state and fetal cardiac activity

2017 ◽  
Vol 12 (S 01) ◽  
pp. S1-S84
Author(s):  
H Mat Husin ◽  
F Schleger ◽  
I Kiefer-Schmidt ◽  
M Weiss ◽  
E Fehlert ◽  
...  
Keyword(s):  
Cardiac Activity ◽  
Fasting State ◽  
Maternal Metabolism ◽  
Fetal Cardiac Activity

Ungewöhnliche attackenweise Einschlafstörungen Unusual attack-like sleep onset disturbances

2017 ◽  
Vol 36 (06) ◽  
pp. 435-438
Author(s):  
M. Sparmann ◽  
D. Müller
Keyword(s):  
Sleep Onset ◽  
Sleep Starts

ZusammenfassungUnter Bezugnahme auf einen Fallbericht mit stromstoßartigen Empfindungen im Rachen beim Einschlafen sowie Zusammenzucken infolge Erschreckens dabei und unabhängig davon Zuckungen der Arme oder Beine sowie Apnoen wird auf das Vorkommen von sensiblen oder sensorischen Wahrnehmungen als ungewöhnliche Begleiterscheinungen von Einschlafmyoklonien hingewiesen. Sie können auch ohne Zuckungen als deren Äquivalente bzw. Varianten auftreten und werden sensory sleep starts genannt. Bislang hat das Gefühl des explodierenden Kopfes besondere Beachtung gefunden und ist in der internationalen Klassifikation der Schlafstörungen als exploding head syndrome neben den Halluzinationen angeführt, obgleich es zu diesen gehört.

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