Czasopismo | ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA | Rocznik 2012 - zeszyt 12

Prediction of fatigue and sleep onset using HRV analysis (Predykcja zmęczenia i zasypiania z wykorzystaniem analizy HRV)

nr katalogowy: 73352

Research on sleep onset and fatigue is conducted in many scientific centres around the world by many research teams. The standard definition of the moment of sleep onset is based on changes in EEG, EOG, ECG and EMG, and usually reliably detects changes within a few seconds. When in an alert state, as long as a particular person has their eyes closed and at the moment of sleep onset, the EEG record shows a domination of alpha waves. However, the detection of SO (sleep onset) is much more complicated, for example due to the fact that the subjective perception of falling asleep does not always coincide with that specified and defined. During sleep onset a number of different parameters change in specific moments, but they do not coincide in time. The conclusion from this is that sleep onset is not a discrete occurrence but a continuous process. It has been observed that before and during sleep onset the power level in the bands VLF and LF decreases, which reflects a decrease in sympathetic system activity. However, an increase in the power of the HF band can be seen, which means movement toward parasympathetic domination [2, 5]. These trends persist along with the deepening of NREM sleep [4]. A significant increase in the value of RR intervals during sleep has also been noticed, although their variability decreased. The mean RR interval (RRI) increased (heart rate decreased) during SO. A significant change in the level of RR intervals occurred 30 s after sleep onset compared to the average RRI level for 7-9 minutes before SO [2]. Another indicator of sleepiness is a drop in the value of the LF/HF ratio. During sleep, it has minimum values [1]. HRV analysis The RR interval represents the length of the ventricular cardiac cycle, it is measured between two successive R waves and serves as an indicator of ventricular rate. It is also called the inter-beat interval. Heart rate variability is the degree of fluctuation in the length o[...]

Jeśli masz wykupiony/przyznany dostęp - zaloguj się. Skorzystaj z naszych propozycji zakupu!

Publikacja


e-Publikacja (format pdf) - nr 73352 "Prediction of fatigue and..." licencja: Osobista Produkt cyfrowy	10.00 zł

Zeszyt


ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA - e-zeszyt (pdf) 2012-12 licencja: Osobista Produkt cyfrowy	35.00 zł

Prenumerata

ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA - prenumerata cyfrowa
licencja: Osobista

Produkt cyfrowy
Nowość

420.00 zł

ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA - papierowa prenumerata roczna + wysyłka
licencja: Osobista

Szczegóły pakietu

Nazwa
ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA - papierowa prenumerata roczna	528.00 zł brutto 488.89 zł netto 39.11 zł VAT (stawka VAT 8%)
ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA - pakowanie i wysyłka	42.00 zł brutto 34.15 zł netto 7.85 zł VAT (stawka VAT 23%)

570.00 zł

ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA - PAKIET prenumerata PLUS
licencja: Osobista

Szczegóły pakietu

Nazwa
ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA - PAKIET prenumerata PLUS (Prenumerata papierowa + dostęp do portalu sigma-not.pl + e-prenumerata)	636.00 zł brutto 588.89 zł netto 47.11 zł VAT (stawka VAT 8%)

636.00 zł

Zeszyt

2012-12

Twój Koszyk

Publikacja

Zeszyt

Prenumerata

Zeszyt

Czasopisma