scholarly journals Human Rapid Eye Movement Sleep Shows Local Increases in Low-Frequency Oscillations and Global Decreases in High-Frequency Oscillations Compared to Resting Wakefulness

eNeuro ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. ENEURO.0293-18.2018 ◽  
Author(s):  
Benjamin Baird ◽  
Anna Castelnovo ◽  
Brady A. Riedner ◽  
Antoine Lutz ◽  
Fabio Ferrarelli ◽  
...  
Keyword(s):  
Eye Movement ◽  
High Frequency ◽  
Low Frequency ◽  
Rapid Eye Movement ◽  
Rapid Eye Movement Sleep ◽  
High Frequency Oscillations ◽  
Low Frequency Oscillations

High frequency oscillations are less frequent but more specific to epileptogenicity during rapid eye movement sleep

2016 ◽  
Vol 127 (1) ◽  
pp. 179-186 ◽  
Author(s):  
Rie Sakuraba ◽  
Masaki Iwasaki ◽  
Eiichi Okumura ◽  
Kazutaka Jin ◽  
Yosuke Kakisaka ◽  
...  
Keyword(s):  
Eye Movement ◽  
High Frequency ◽  
Rapid Eye Movement ◽  
Rapid Eye Movement Sleep ◽  
High Frequency Oscillations

Electroencephalogram analysis of non-rapid eye movement sleep in rats

1988 ◽  
Vol 255 (1) ◽  
pp. R27-R37 ◽  
Author(s):  
L. Trachsel ◽  
I. Tobler ◽  
A. A. Borbely
Keyword(s):  
Eye Movement ◽  
Slow Wave ◽  
Power Spectra ◽  
Low Frequency ◽  
Wave Activity ◽  
Slow Wave Activity ◽  
Rapid Eye Movement ◽  
Rapid Eye Movement Sleep ◽  
Episode Duration ◽  
High Frequency Activity

Sleep states and power spectra of the electroencephalogram were determined for consecutive 4-s epochs during 24 h in rats that had been implanted with electrodes under deep pentobarbital anesthesia. The power spectra in non-rapid eye movement sleep (NREMS) showed marked trends: low-frequency activity (0.75-7.0 Hz) declined progressively throughout the 12-h light period (L) and remained low during most of the 12-h dark period (D); high-frequency activity (10.25-25.0 Hz) rose toward the end of L and reached a maximum at the beginning of D. Within a single NREMS episode (duration 0.5-5.0 min), slow-wave activity (0.75-4.0 Hz) increased progressively to a plateau level. The rise was approximated by a saturating exponential function: although the asymptote level of the function showed a prominent 24-h rhythm, the time constant remained relatively stable (approximately 40 s). After short interruptions of NREMS episodes, slow-wave activity rose more steeply than after long interruptions. The marked 24-h variation of maximum slow-wave activity within NREMS episodes may reflect the level of a homeostatic sleep process.

Observation of Turbulent Waves in a Helium Plasma by Optical Spectroscopy

1975 ◽  
Vol 30 (10) ◽  
pp. 1271-1278
Author(s):  
W. R. Rutgers
Keyword(s):  
Energy Density ◽  
Field Strength ◽  
High Frequency ◽  
Low Frequency ◽  
Turbulent Plasma ◽  
Helium Plasma ◽  
High Frequency Oscillations ◽  
Low Frequency Oscillations ◽  
Frequency Domains ◽  
Turbulent Heating

Abstract From the combined Stark-Zeeman pattern of helium allowed and forbidden optical lines the frequency spectrum, the field strength and the dominant polarization of microfields were determined in a turbulent plasma. Two frequency domains of oscillations were found in a turbulent heating experiment: low-frequency oscillations with dominant polarization perpendicular to the current direction and high-frequency oscillations (f~fpe) with random polarization. The r.m.s. field strength of the oscillations is between 2 kV/cm and 10 kV/cm. The energy density of turbulent microfields amounts to 1‰ of the thermal energy density.

High-frequency repetitive transcranial magnetic stimulation delays rapid eye movement sleep

Neuroreport ◽  
1998 ◽  
Vol 9 (15) ◽  
pp. 3439-3443 ◽  
Author(s):  
Stefan Cohrs ◽  
Frithjof Tergau ◽  
Sebastian Riech ◽  
Sabine Kastner ◽  
Walter Paulus ◽  
...  
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Eye Movement ◽  
High Frequency ◽  
Magnetic Stimulation ◽  
Repetitive Transcranial Magnetic Stimulation ◽  
Rapid Eye Movement ◽  
Rapid Eye Movement Sleep

scholarly journals VIBRATORY SEPARATION OF GRAIN FROM THE EAR: PROBLEMS AND PERSPECTIVES

2020 ◽  
Author(s):  
V.I. Pakhomov ◽  
◽  
S.V. Braginets ◽  
O.N. Bakhchevnikov ◽  
D.V. Rudoy ◽  
...  
Keyword(s):  
High Frequency ◽  
Natural Frequencies ◽  
Low Frequency ◽  
Mechanical Resonance ◽  
High Frequency Oscillations ◽  
Low Frequency Oscillations ◽  
Oscillation Frequencies

The method of vibratory separation of grain from ear is validated in article. It is set that transferring to a stalk with ear low frequency oscillations in the range 18…100 Hz corresponding to natural frequencies of its oscillations are possible to achieve damage of ear or its detachment from a stalk as a result of a resonance. But this interval of oscillation frequencies does not provide separation of grains from ear as does not lead to damage of perular scales. Transmission to ear of high-frequency oscillations in the range 100…14000 Hz matching its natural frequencies of oscillations is perspective for this purpose. The mechanical resonance generate to grain separation owing to break off perular scales from ear can result from such vibratory influence.

scholarly journals early diagnosis of the hemodynamic regulation disorders in orthostasis

2016 ◽  
Vol 1 (5) ◽  
pp. 30-34
Author(s):  
Мартынов ◽  
Ilya Martynov
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
High Frequency ◽  
Low Frequency ◽  
Orthostatic Test ◽  
Peripheral Vascular ◽  
High Frequency Oscillations ◽  
Low Frequency Oscillations ◽  
Vasomotor Regulation ◽  
Informative Content

The article deals with the informative content of spectral analysis of heart rate variability in the assessment of the regulatory impacts on the systemic hemodynamics during orthostatic test. It was observed that the patients who suffer from neurogenic syncope already at a young age had had a decrease in low frequency oscillations, as well as a decrease in peripheral vascular resistance during the test. It allows us to make a conclusion about the sympathetic vasomotor regulation dysfunction, even before the symptoms of orthostatic hypotension were evident. The decrease in the tonic vagal effect which follows from the depression of high-frequency oscillations, makes for increasing the chronotropic function of the heart and keeps a relative sympathetic predominance in order to maintain adequate level of blood pressure

scholarly journals Novel Polygraphic Observations in High Frequency Range during Rapid Eye Movement Sleep.

1999 ◽  
Vol 5 (2) ◽  
pp. 99-108 ◽  
Author(s):  
Mitsuaki YAMAMOTO ◽  
Ken SUZUKI ◽  
Kazuhiro NAKAMURA ◽  
Mitsuyuki NAKAO ◽  
Norihiro KATAYAMA ◽  
...  
Keyword(s):  
Eye Movement ◽  
High Frequency ◽  
Rapid Eye Movement ◽  
High Frequency Range ◽  
Rapid Eye Movement Sleep ◽  
Frequency Range
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