Eye-head coordination for the steering of locomotion in humans: An anticipatory synergy

Renato Grasso, Pascal Prévost, Yuri P. Ivanenko, Alain Berthoz

Research output: Contribution to journalArticle

Abstract

We investigated head and gaze orientation in six healthy volunteers walking along 90 corner trajectories, both at light and with eyes closed. We found that head and eyes systematically deviated toward the future direction of the curved trajectory. Anticipation lead was about 1 s. Strikingly, the same behaviour was observed in darkness. In backward (BW) locomotion along the trajectory (from end- to start-point), gaze deviated toward the opposite direction, such that the forward locomotor pattern did not appear time- reversed. Orienting movements displayed higher amplitude, reproducibility and time lead in the forward (FW) direction at light. We suggest that anticipatory orienting synergies belong to the behavioural repertoire of human navigation and may reflect the need to prepare a stable reference frame for intended action.

Original languageEnglish
Pages (from-to)115-118
Number of pages4
JournalNeuroscience Letters
Volume253
Issue number2
DOIs
Publication statusPublished - Sep 4 1998

Keywords

  • Anticipation
  • Eye-head coordination
  • Feed-forward control
  • Head movements
  • Locomotion
  • Steering

ASJC Scopus subject areas

  • Neuroscience(all)

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