Abstract
As individuals stand or walk in an environment their gaze may be reoriented from one location to another in response to auditory or visual stimuli. In order to reorient gaze, the eyes and/or the head and trunk must rotate. However, what determines the exact degree of rotation of each segment while standing or walking is not fully understood. In the current study we show that when participants were asked to reorient their gaze towards light cues positioned at eccentric locations of up to 90° while standing or walking on a treadmill their eyes and head mainly facilitated the action. Rotations of the head-in-space were similar for both tasks, but the rotation of the shoulders- and hips-in-space were lower for the treadmill walking condition. It is argued that this difference in the level of head-on-trunk rotation during the two tasks is controlled by the vestibular feedback loop. The regulation of this feedback loop is performed by the cerebellum in response to the level of threat to postural stability.
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Cinelli, M., Patla, A. & Stuart, B. Involvement of the head and trunk during gaze reorientation during standing and treadmill walking. Exp Brain Res 181, 183–191 (2007). https://doi.org/10.1007/s00221-007-0914-3
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DOI: https://doi.org/10.1007/s00221-007-0914-3