Dynamic performance of vibration induced anterior-posterior sway during upright posture in normal subjects

Research output: Contribution to journalArticle


Human postural control works as a dynamic feedback control system. The dynamic performance of postural control for anterior-posterior movements during upright posture are defined by three parameters. These parameters reflect the stiffness, the damping and the swiftness of a response to an induced perturbation. In the present study 23 normal subjects were investigated. Both with open and closed eyes, there was a negative correlation between swiftness and stiffness. With open eyes there was also a weak correlation between swiftness and damping. When the subjects were tested with open eyes there was a prominent and highly significant increase of stiffness and a reduction of swiftness of the responses. It was found that proprioceptive information from the calf muscles contributes in postural control of movements up to 1 Hz and visual information is important for movements up to 0.05 Hz. The present findings suggest that postural control changes dynamic strategies depending on the available sensory feedback.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Otorhinolaryngology


  • Adolescent, Adult, Feedback, Humans, Middle Aged, Postural Balance, Posture, Vibration, Vision, Ocular, Journal Article
Original languageEnglish
Pages (from-to)227-30
Number of pages4
JournalActa Oto-Laryngologica, Supplement
Publication statusPublished - 1989
Publication categoryResearch