It was predicted that due to the optical distortion produced.by wearing a facemask, the constancy of visual position would not be maintained under water, i. e., stationary objects should appear to move when the head is moved. Subjects made magnitude estimates of object movement in both air and water. Twice as much movement occurred in water as in air. Two underwater activities, head rotation wh...

During pursuit of smoothly moving targets with combined eye and head movements in normal subjects, accurate gaze control depends on successful interaction of the vestibular and head movement signals with the ocular pursuit mechanisms. To investigate compensation for loss of the vestibulo-ocular reflex during head-free pursuit in labyrinthine-deficient patients, pursuit performance was assessed ...

Studies on the relationship between eyebrow movement and other aspects of speech production have focused on large, discrete movements of the eyebrows. Using integrated optical and electromagnetic point tracking, we measured eyebrow movements relative to the skull with a high level of precision. These data in combination with a correlational analysis method that accommodates varying phasing betw...

Human head movement can be looked at, as a rotational dynamics on the space SO(3) with constraints that have to do with the axis of rotation. Typically the axis vector, after a suitable scaling, is assumed to lie in a surface called Donders’ surface. Various descriptions of Donders’ surface are in the literature and in this paper we assume that the surface is described by a quadratic form. We p...

Visually-guided locomotion is important for autonomous robotics. However, there are several difficulties, for instance, the head shaking that results from the robot locomotion itself that constraints stable image acquisition and the possibility to rely on that information to act accordingly. In this article, we propose a controller architecture that is able to generate locomotion for a quadrupe...

When people interact with each other, they not only listen to what the other says, they react to facial expressions, gaze direction, and head movement. Human-computer interaction would be enhanced in a friendly and non-intrusive way if computers could understand and respond to users' body language in the same way. This thesis aims to investigate new methods for human computer interaction by com...

Eye-head (EH) neurons within the medial vestibular nuclei are thought to be the primary input to the extraocular motoneurons during smooth pursuit: they receive direct projections from the cerebellar flocculus/ventral paraflocculus, and in turn, project to the abducens motor nucleus. Here, we recorded from EH neurons during head-restrained smooth pursuit and head-unrestrained combined eye-head ...

This research extends the study of head movements during listening by including various listening tasks where the listeners evaluate spatial impression and timbre, in addition to the more common task of judging source location. Subjective tests were conducted in which the listeners were allowed to move their heads freely whilst listening to various types of sound and asked to evaluate source lo...

This study was designed to investigate the effects of eye tracking stimulation on the movement of the body's center of gravity (CG) and the head in aged persons 60 years old and above. Twenty-three healthy aged subjects ranging from 60 to 79 years old and 10 healthy young subjects were asked to pursue a pendulously moving horizontal target when standing with the feet together. The frequencies o...