Natural variation in geomagnetic pulsations and preschool children's sleep disturbance and motor activity levels

This study evaluated the putative association between fluctuations in preschool-aged children's motor activity level (AL) and fluctuations in the intensity of the earth's magnetic field, referred to as geomagnetic pulsations. A sample of 32 preschoolers wore two different types of activity...

Full description

Bibliographic Details
Main Author: Mitsutake, Gen
Format: Others
Language:en
en_US
Published: 2007
Online Access:http://hdl.handle.net/1993/2480
id ndltd-LACETR-oai-collectionscanada.gc.ca-MWU.anitoba.ca-dspace#1993-2480
record_format oai_dc
spelling ndltd-LACETR-oai-collectionscanada.gc.ca-MWU.anitoba.ca-dspace#1993-24802013-01-11T13:30:07ZMitsutake, Gen2007-07-12T17:46:22Z2007-07-12T17:46:22Z2001-05-01T00:00:00Zhttp://hdl.handle.net/1993/2480This study evaluated the putative association between fluctuations in preschool-aged children's motor activity level (AL) and fluctuations in the intensity of the earth's magnetic field, referred to as geomagnetic pulsations. A sample of 32 preschoolers wore two different types of activity monitors on their right ankles for five hours once a week for ten weeks. A measure of child's sleep was completed by each child's parent on the morning of each activity assessment. It was hypothesized that high-amplitude pulsations in the intensity of the earth's magnetic field would, by disturbing their sleep the night before, decrease children's AL. Sleep disturbance and AL measured on geomagnetically active days were contrasted with the same measures on geomagnetically quiet days. Three different thresholds for defining geomagnetically active days were evaluated. Regardless of threshold used, sleep disturbance was unrelated to differences in geomagnetic activity. However, when the highest threshold was used to define ageomagnetically active day and contrasted with the quietest day, AL was significantly lower on the geomagnetically active day. It is concluded that the evidence provides some tentative support for a link between geomagnetic disturbances, which are "rapidly varying perturbation to Earth's magnetic field" (National Academies, 2001), and activity level, but this link does not appear to be mediated by sleep disturbance.5359860 bytes184 bytesapplication/pdftext/plainenen_USNatural variation in geomagnetic pulsations and preschool children's sleep disturbance and motor activity levelsPsychologyM.A.
collection NDLTD
language en
en_US
format Others
sources NDLTD
description This study evaluated the putative association between fluctuations in preschool-aged children's motor activity level (AL) and fluctuations in the intensity of the earth's magnetic field, referred to as geomagnetic pulsations. A sample of 32 preschoolers wore two different types of activity monitors on their right ankles for five hours once a week for ten weeks. A measure of child's sleep was completed by each child's parent on the morning of each activity assessment. It was hypothesized that high-amplitude pulsations in the intensity of the earth's magnetic field would, by disturbing their sleep the night before, decrease children's AL. Sleep disturbance and AL measured on geomagnetically active days were contrasted with the same measures on geomagnetically quiet days. Three different thresholds for defining geomagnetically active days were evaluated. Regardless of threshold used, sleep disturbance was unrelated to differences in geomagnetic activity. However, when the highest threshold was used to define ageomagnetically active day and contrasted with the quietest day, AL was significantly lower on the geomagnetically active day. It is concluded that the evidence provides some tentative support for a link between geomagnetic disturbances, which are "rapidly varying perturbation to Earth's magnetic field" (National Academies, 2001), and activity level, but this link does not appear to be mediated by sleep disturbance.
author Mitsutake, Gen
spellingShingle Mitsutake, Gen
Natural variation in geomagnetic pulsations and preschool children's sleep disturbance and motor activity levels
author_facet Mitsutake, Gen
author_sort Mitsutake, Gen
title Natural variation in geomagnetic pulsations and preschool children's sleep disturbance and motor activity levels
title_short Natural variation in geomagnetic pulsations and preschool children's sleep disturbance and motor activity levels
title_full Natural variation in geomagnetic pulsations and preschool children's sleep disturbance and motor activity levels
title_fullStr Natural variation in geomagnetic pulsations and preschool children's sleep disturbance and motor activity levels
title_full_unstemmed Natural variation in geomagnetic pulsations and preschool children's sleep disturbance and motor activity levels
title_sort natural variation in geomagnetic pulsations and preschool children's sleep disturbance and motor activity levels
publishDate 2007
url http://hdl.handle.net/1993/2480
work_keys_str_mv AT mitsutakegen naturalvariationingeomagneticpulsationsandpreschoolchildrenssleepdisturbanceandmotoractivitylevels
_version_ 1716574963483279360