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Head positioning control in a gravito-inertial field and in normal gravity.
J Vestib Res. 2004; 14(4):321-33.JV

Abstract

The way in which the head is controlled in roll was investigated by dissociating the body axis and the gravito-inertial force orientation. Seated subjects (N = 8) were requested to align their head with their trunk, 30 degrees to the left, 30 degrees to the right or with the gravito-inertial vector, before, during (Per Rotation), after off-center rotation and on a tilted chair without rotation (Tilted). The gravito-inertial vector angle during rotation and the chair tilt angle were identical (17 degrees). The subjects were either in total darkness or facing a visual frame that was fixed to the trunk. Both final error and within-subject variability of head positioning increased when the body axis and the gravito-inertial vector were dissociated (Per Rotation and Tilted). However, the behavior was different depending on whether the subjects were in the Tilted or Per Rotation conditions. The presentation of the visual frame reduced the within-subject variability and modified the perception of the gravito-inertial vector's orientation on the tilted chair. As head positioning with respect to the body and sensing of the gravito-inertial vector are modified when body axis and gravito-inertial vector orientation are dissociated, the observed decrease in performance while executing motor tasks in a gravito-inertial field may be at least in part attributed to the inaccurate sensing of head position.

Authors+Show Affiliations

UMR 6152 Mouvement & Perception, Université de la méditerranée & CNRS, Faculté des Sciences du Sport, 13288 Marseille Luminy, France. sares@laps.univ-mrs.frNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15328446

Citation

Sarès, Frédéric, et al. "Head Positioning Control in a Gravito-inertial Field and in Normal Gravity." Journal of Vestibular Research : Equilibrium & Orientation, vol. 14, no. 4, 2004, pp. 321-33.
Sarès F, Bourdin C, Prieur JM, et al. Head positioning control in a gravito-inertial field and in normal gravity. J Vestib Res. 2004;14(4):321-33.
Sarès, F., Bourdin, C., Prieur, J. M., Vercher, J. L., Menu, J. P., & Gauthier, G. M. (2004). Head positioning control in a gravito-inertial field and in normal gravity. Journal of Vestibular Research : Equilibrium & Orientation, 14(4), 321-33.
Sarès F, et al. Head Positioning Control in a Gravito-inertial Field and in Normal Gravity. J Vestib Res. 2004;14(4):321-33. PubMed PMID: 15328446.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Head positioning control in a gravito-inertial field and in normal gravity. AU - Sarès,Frédéric, AU - Bourdin,Christophe, AU - Prieur,Jean-Michel, AU - Vercher,Jean-Louis, AU - Menu,Jean-Pierre, AU - Gauthier,Gabriel M, PY - 2004/8/26/pubmed PY - 2005/2/16/medline PY - 2004/8/26/entrez SP - 321 EP - 33 JF - Journal of vestibular research : equilibrium & orientation JO - J Vestib Res VL - 14 IS - 4 N2 - The way in which the head is controlled in roll was investigated by dissociating the body axis and the gravito-inertial force orientation. Seated subjects (N = 8) were requested to align their head with their trunk, 30 degrees to the left, 30 degrees to the right or with the gravito-inertial vector, before, during (Per Rotation), after off-center rotation and on a tilted chair without rotation (Tilted). The gravito-inertial vector angle during rotation and the chair tilt angle were identical (17 degrees). The subjects were either in total darkness or facing a visual frame that was fixed to the trunk. Both final error and within-subject variability of head positioning increased when the body axis and the gravito-inertial vector were dissociated (Per Rotation and Tilted). However, the behavior was different depending on whether the subjects were in the Tilted or Per Rotation conditions. The presentation of the visual frame reduced the within-subject variability and modified the perception of the gravito-inertial vector's orientation on the tilted chair. As head positioning with respect to the body and sensing of the gravito-inertial vector are modified when body axis and gravito-inertial vector orientation are dissociated, the observed decrease in performance while executing motor tasks in a gravito-inertial field may be at least in part attributed to the inaccurate sensing of head position. SN - 0957-4271 UR - https://www.unboundmedicine.com/medline/citation/15328446/Head_positioning_control_in_a_gravito_inertial_field_and_in_normal_gravity_ L2 - https://content.iospress.com/openurl?genre=article&issn=0957-4271&volume=14&issue=4&spage=321 DB - PRIME DP - Unbound Medicine ER -