Force perceptual bias caused by muscle activity in unimanual steering

Autoři: Yusuke Kishishita aff001;  Yoshihiro Tanaka aff002;  Yuichi Kurita aff001
Působiště autorů: Hiroshima University, 1-4-1, Kagamiyama, Higashi-Hiroshima, Hiroshima, Japan aff001;  Nagoya Institute of Technology, Gokiso‑cho, Showa‑ku, Nagoya, Aichi, Japan aff002;  JSPS Research Fellow, JSPS, Tokyo, Japan aff003;  JST, PRESTO, Hiroshima, Japan aff004
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article
doi: 10.1371/journal.pone.0223930


This study sought to investigate whether force perceptual bias was affected by differences in posture while steering an automobile using a psychophysical experiment to examine the relationship with muscle activity. The human perceptual characteristics of weight and force are known to be nonlinear, and a perceptual bias can occur, that is, bias that causes a perception of something that is larger or smaller than the actual scale. This is considered to be caused by physical and/or psychological conditions. Sense of effort is believed to be one influential factor. It is known to correlate with muscle activity intensity, and bias may be caused by muscle activity changes. In the current study, we hypothesized that force perceptual bias would depend on posture due to the intensity of muscle activity changes caused by changing postures during steering operation. By investigating this hypothesis, we can clarify the relationship between sense of effort and muscle activity. To investigate this issue, we conducted a psychophysical experiment to confirm postural dependence, and estimated muscle activity using a three-dimensional musculoskeletal model simulation with postural and arm force data during the experiment. In addition, prediction of bias was conducted based on a simulation in the psychophysical experiment using these data. The results revealed that bias existed, as measured by differences in postures. Additionally, a significant moderate correlation was found between the predicted bias and the actual bias, indicating the existence of a relationship between muscle activity and bias.

Klíčová slova:

Fatigue – Musculoskeletal system – Perception – Psychophysics – Sensory perception – Skeletal joints – Torque – Steering


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2019 Číslo 10