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- W1524776875 abstract "Abstract — Air travel is becoming increasingly more accessible to people with the availability of low cost air travel. However, travel by air, especially long distance, is not a natural activity for human. During air travel, people experience some degree of physiological and psychological discomforts. In this paper, four experiments were conducted to unfold the relationship of sternocleidomastoid electromyography value over head rotation angle in related with head support condition and gender. The results from the experiment served as important input for the validation of the developed adaptive neck support system for economy class aircraft seat. Index Terms — head rotation angle, EMG, AnS 2 , economy class aircraft seat. I. I NTRODUCTION Many aircraft passenger experience some degree of physiological and psychological discomfort during air travel. Excessive stress may cause passenger to become aggressive, over-reaction, and even endanger the passenger’s health [1, 2]. A number of health problems can affect the passengers. The Cambridge Advanced Learner’s dictionary [3] defines comfort as a pleasant feeling of being relax and free from pain. Hertzberg [4] describes comfort as absence of discomfort. The term “seat comfort” is typically used to define the short-term effect of a seat to the human body [5]. Comfort is a generic and subjective feeling that is difficult to measure, interpret, and related to human physiological homeostasis and psychological well being [6]. Seat comfort is a very subjective issue because it is the customer who makes the final determination and customer evaluations are based on their opinions having experienced the seat [7]. Various studies [8, 9, 10, 11, 12] show that there is relationship between electromyography (EMG) activity of sternocleidomastoid (SCM) muscle and head rotation. Ylinen et al. [8] characterizes isometric rotation strength in both neutral and different pre-rotated positions of the neck. Twenty healthy men volunteered as participants. Maximal axial rotation strength of the neck muscles was measured in a neutral position and bilaterally at 30° and 60° rotation using the isometric neck strength measurement system. Isometric maximum voluntary contractions of the neck muscles in flexion and extension were tested. The highest strength" @default.
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- W1524776875 date "2010-06-01" @default.
- W1524776875 modified "2023-09-24" @default.
- W1524776875 title "The Relationship of Head Rotation Angle and SCM EMG Value for the Development of AnS2" @default.
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