Vestibular efferent system in pigeons. Anatomical organization and effect upon semicircular canal afferent responsiveness
No abstract available
NASA Discipline Neuroscience↗
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Structure and function of vestibular nerve fibers in the chinchilla and squirrel monkey
No abstract available
Non-NASA Center↗
Quantification of different classes of canal-related vestibular nuclei neuron responses to linear acceleration
No abstract available
Non-NASA Center↗
Interactions between otoliths and vision revealed by the response to Z-axis linear movements
No abstract available
Non-NASA Center↗
Optical and somesthetic biases of postural orientation in the pitch dimension
No abstract available
NASA Center ARC↗
The representation of the spatial vertical in human optokinetic nystagmus
With our stimulus conditions we were unable to record more than 2-3 beats of OKAN; therefore direct comparison to the data recorded from monkeys is not possible. We did, however, see cross-coupling in OKN. In monkeys, cross-coupling predominates in OKAN, indicating that velocity storage underlies this phenomenon. We consistently saw the axis of response shift towards the spatial vertical. This implies that although OKAN was weak, velocity storage contributed a representation of the spatial vertical to OKN that is dependent on the axis of the head or body with respect to gravity.
Non-NASA Center↗
Characterization of yaw to roll cross-coupling in the three-dimensional structure of the velocity storage integrator
No abstract available
NASA Discipline Neuroscience↗
VTM--a new method of measuring ocular torsion using image-processing techniques
No abstract available
Non-NASA Center↗
The effects of unidirectional visual surround translation on detection of physical linear motion direction. A psychophysical scale for vection
No abstract available
Non-NASA Center↗
A model of responses of horizontal-canal-related vestibular nuclei neurons that respond to linear head acceleration
No abstract available
NASA Discipline Neuroscience↗
Three-dimensional eye velocity measurement following postrotational tilt in the monkey
No abstract available
NASA Discipline Neuroscience↗
Recovery of postural equilibrium control following spaceflight
Decreased postural stability is observed in most astronauts immediately following spaceflight. Because ataxia may present postflight operational hazards, it is important to determine the incidence of postural instability immediately following landing and the dynamics of recovery of normal postural equilibrium control. It is postulated that postflight postural instability results from in-flight adaptive changes in central nervous system (CNS) processing of sensory information from the visual, vestibular, and proprioceptive systems. The purpose of the present investigation was to determine the magnitude and time course of postflight recovery of postural equilibrium control and, hence, readaptation of CNS processing of sensory information. Thirteen crew members from six spaceflight missions were studied pre- and postflight using a modified commercial posturography system. Postural equilibrium control was found to be seriously disrupted immediately following spaceflight in all subjects. Readaptation to the terrestrial environment began immediately upon landing, proceeded rapidly for the first 10-12 hours, and then proceeded much more slowly for the subsequent 2-4 days until preflight stability levels were reachieved. It is concluded that the overall postflight recovery of postural stability follows a predictable time course.
NASA Discipline Neuroscience↗
Validating the hypothesis of otolith asymmetry as a cause of space motion sickness
No abstract available
Non-NASA Center↗
The effects of target distance on eye and head movement during locomotion
No abstract available
NASA Discipline Neuroscience↗