2015 Disability and rehabilitation. Assistive technology
* Assessing head and trunk symmetry during sleep using tri-axial accelerometers.
- Using two types of small, lightweight tri-axial accelerometers, we obtained evidence for the effectiveness of an approach for assessing head-trunk symmetrical or asymmetrical positions during sleep. First, we assessed the accuracy of our monitoring system in five healthy young adults (age range, 22-24 years). The participants wore acceleration monitors on the sternum and forehead; then spent 5 min in six different positions. Once accuracy was confirmed, we assessed head-trunk symmetry during night-time sleep in 10 healthy children (age range, 3-13 years) and 10 young adults (age range, 21-26 years) in their home environments. All participants wore the monitors during one night's sleep in their homes. After computing head-trunk positions using the orientation data obtained by the accelerometers, head and trunk symmetry were evaluated. The head and trunk positions were correctly detected: the positional data from the trunk had 99% agreement, and the data from the head had 96% agreement. Both the young adults and children were observed to spend time with the head-trunk in asymmetric positions; however, the subjects changed position frequently so the asymmetrical postures were mobile. We concluded that the proposed monitoring system is a reliable and valid approach for assessing head-trunk symmetry during sleep at home. Implications for Rehabilitation We propose a head and trunk symmetry monitoring system using accelerometers. The proposed system could accurately identify head and trunk position. Asymmetrical positioning was seen in healthy participants but it was not immobile.
=>初めて, 最初の, 第一の, はじめに, 最初, 第1
Overview of noun first
The noun first has 6 senses (first 4 from tagged texts)
1. (9) first, number one -- (the first or highest in an ordering or series; "He wanted to be the
first")
2. (5) first, number one, number 1 -- (the first element in a countable series; "the first of the
month")
3. (1) beginning, commencement, first, outset, get-go, start, kickoff, starting time, showtime,
offset -- (the time at which something is supposed to begin; "they got an early start"; "she knew
from the get-go that he was the man for her")
4. (1) first base, first -- (the fielding position of the player on a baseball team who is stationed
at first of the bases in the infield (counting counterclockwise from home plate))
5. first, first-class honours degree -- (an honours degree of the highest class)
6. first gear, first, low gear, low -- (the lowest forward gear ratio in the gear box of a motor
vehicle; used to start a car moving)
Overview of adj first
The adj first has 6 senses (first 5 from tagged texts)
1. (232) first -- (preceding all others in time or space or degree; "the first house on the right";
"the first day of spring"; "his first political race"; "her first baby"; "the first time"; "the
first meetings of the new party"; "the first phase of his training")
2. (61) first, 1st -- (indicating the beginning unit in a series)
3. (4) inaugural, initiative, initiatory, first, maiden -- (serving to set in motion; "the
magazine's inaugural issue"; "the initiative phase in the negotiations"; "an initiatory step toward
a treaty"; "his first (or maiden) speech in Congress"; "the liner's maiden voyage")
4. (4) beginning, first -- (serving to begin; "the beginning canto of the poem"; "the first verse")
5. (3) first, foremost, world-class -- (ranking above all others; "was first in her class"; "the
foremost figure among marine artists"; "the top graduate")
6. first -- (highest in pitch or chief among parts or voices or instruments or orchestra sections;
"first soprano"; "the first violin section"; "played first horn")
Overview of adv first
The adv first has 4 senses (first 4 from tagged texts)
1. (58) first, firstly, foremost, first of all, first off -- (before anything else; "first we must
consider the garter snake")
2. (40) first, for the first time -- (the initial time; "when Felix first saw a garter snake")
3. (9) first -- (before another in time, space, or importance; "I was here first"; "let's do this
job first")
4. (4) foremost, first -- (prominently forward; "he put his best foot foremost")
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