Journal ArticleDOI
Head Stabilization during Locomotion: Perturbations Induced by Vestibular Disorders
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TLDR
The results suggest that head kinematics, during natural locomotor tasks, could be used to evaluate vestibular deficiencies.Abstract:
Head kinematics was studied in 10 normal subjects (NS) and 7 patients (P) with bilateral vestibular deficit while they executed various locomotor tasks. The movement of the body was recorded with a video system which allowed a computer reconstruction of the motion of joint articulations and other selected points on the body in three dimensions. Analyses focus on head translation along the vertical axis and rotation in the sagittal plane. Two conditions were studied: free walking (W) and hopping (H). The subjects were tested in light and in darkness. In NS, while walking in darkness, mean head position was tilted downward. In contrast, this flexion was not systematic in P. Darkness did not significantly influence the amplitude and velocity of head angular displacement during W, but, during H the amplitude decreased by 37% for NS. During H in darkness, head stabilization decreased for P. These results suggest that head kinematics, during natural locomotor tasks, could be used to evaluate vestibular deficien...read more
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Références bibliographiques: La fibroscopie bronchique
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Journal ArticleDOI
Firing Properties of Head Direction Cells in the Rat Anterior Thalamic Nucleus: Dependence on Vestibular Input
TL;DR: The data suggest that the neural code for directional bearing is critically dependent on Vestibular information and this loss of HD cell information may represent a neurobiological mechanism to account for the orientation and navigational deficits observed after vestibular dysfunction.
Journal ArticleDOI
Statistics of the Vestibular Input Experienced during Natural Self-Motion: Implications for Neural Processing
TL;DR: It is suggested that the unique structure of natural vestibular stimuli will have important consequences on the neural coding strategies used by this essential sensory system to represent self-motion in everyday life.
Journal ArticleDOI
Head stability during quiet sitting in children with cerebral palsy: effect of vision and trunk support.
TL;DR: It is demonstrated that children with mild to moderate CP have deficits in head stability even during quiet sitting, and vision affected children with CP differently depending on their movement disorder.
Journal ArticleDOI
Gaze stabilization and gait performance in vestibular dysfunction.
Susan L. Whitney,Gregory F. Marchetti,Gregory F. Marchetti,Miranda R. Pritcher,Joseph M. Furman +4 more
TL;DR: In older subjects with vestibular disorders, gaze stability, as assessed by the GST, is associated with reduced test scores on measures of gait performance.
References
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Journal ArticleDOI
Functions of separate sensory receptors of nonauditory labyrinth of the cat.
Kenneth E. Money,John W. Scott +1 more
TL;DR: A technique for plugging individual semicircular canals of cats was developed, and it was established that the plugging of a semicircULAR canal completely blocked its receptivity without influencin...
Book ChapterDOI
Head kinematic during various motor tasks in humans.
TL;DR: The results suggest that head stabilization is related to an ocular fixation point in the direction of gaze in space and is probably regulated on the basis of a predictive mode of sensory motor control.
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Head stabilization during various locomotor tasks in humans. I. Normal subjects.
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