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Titolo:
Influence of head-down and lateral decubitus neck flexion on heart rate variability
Autore:
Lee, CM; Wood, RH; Welsch, MA;
Indirizzi:
Louisiana State Univ, Dept Kinesiol, Baton Rouge, LA 70803 USA Louisiana State Univ Baton Rouge LA USA 70803 , Baton Rouge, LA 70803 USA
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 1, volume: 90, anno: 2001,
pagine: 127 - 132
SICI:
8750-7587(200101)90:1<127:IOHALD>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
POWER SPECTRAL-ANALYSIS; HUMANS; STIMULATION; AFFERENTS; RESPONSES; PRESSURE; REFLEX;
Keywords:
autonomic; otoliths; muscle afferents;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Wood, RH Louisiana State Univ, Dept Kinesiol, 112 HPL Field House, Baton Rouge, LA 70803 USA Louisiana State Univ 112 HPL Field House Baton Rouge LA USA 70803
Citazione:
C.M. Lee et al., "Influence of head-down and lateral decubitus neck flexion on heart rate variability", J APP PHYSL, 90(1), 2001, pp. 127-132

Abstract

The purpose of this study was to examine the response of heart rate variability (HRV), a noninvasive index of autonomic control, to head-down neck flexion (HDNF), which engages both otoliths and neck muscle afferents, and tolateral decubitus neck flexion (LNF), in which neck afferents are activated, whereas otolith afferent input is not. HRV and forearm blood flow were evaluated in participants lying prone, during HDNF, lying in the lateral decubitus position, and during LNF. Compared with the prone position, HDNF resulted in lower high-frequency (46.9 +/- 7.1 vs. 62.3 +/- 6.2) and higher low-frequency (53.1 +/- 7.1 vs. 37.7 +/- 6.2) power, expressed as normalized units, along with higher low-frequency-to-high-frequency ratio (1.65 +/- 0.3 vs. 0.78 +/- 0.2), whereas LNF resulted in no alterations in HRV indexes. Furthermore, there were no significant differences in forearm blood flow or vascular resistance among any of the positions. Our data suggest that otolith organs influence autonomic modulation of the heart, supporting previous studies reporting that HDNF elicits increased sympathetic outflow. These data further suggest that HDNF results in a parasympathetic withdrawal fromthe heart in addition to sympathetic activation.

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Documento generato il 31/03/20 alle ore 19:37:45