Results 251 to 260 of about 76,691 (283)

Ultrastructure of vestibular commissural neurons related to velocity storage in the monkey

Neuroscience, 1999
The angular vestibulo-ocular reflex maintains gaze during head movements. It is thought to be mediated by two components: direct and velocity storage pathways. The direct angular vestibulo-ocular reflex is conveyed by a three neuron chain from the labyrinth to the ocular motoneurons.
Giorgio P Martinelli, Gay R Holstein
exaly   +3 more sources

Effects of midline medullary lesions on velocity storage and the vestibulo-ocular reflex

Experimental Brain Research, 1991
1. Crossing fibers were sectioned at the midline of the medulla caudal to the abducens nucleus in four cynomolgus monkeys. In two animals the lesions caused the time constant of horizontal and vertical per- and post-rotatory nystagmus to fall to 5-8 s. The slow rise in optokinetic nystagmus (OKN), as well as optokinetic after-nystagmus (OKAN) and cross-
Cohen B
exaly   +3 more sources

Neural network models of velocity storage in the horizontal vestibulo-ocular reflex

Biological Cybernetics, 1991
The vestibulo-ocular reflex (VOR) produces compensatory eye movements by utilizing head rotational velocity signals from the semicircular canals to control contractions of the extraocular muscles. In mammals, the time course of horizontal VOR is longer than that of the canal signals driving it, revealing the presence of a central integrator known as ...
T J Anastasio, Anastasio Thomas J
exaly   +3 more sources

Modeling the spatiotemporal organization of velocity storage in the vestibuloocular reflex by optokinetic studies

Journal of Neurophysiology, 1991
1. A generalized three-dimensional state space model of visual vestibular interaction was developed. Matrix and dynamical system operators associated with inputs from the semicircular canals, otolith velocity estimator, and the visual system have been incorporated into the model, which focus on their relationship to the velocity storage integrator. 2.
T, Raphan, D, Sturm
openaire   +3 more sources

Multisensory Integration in the Human Vestibular Velocity Storage Mechanism?

Acta Oto-Laryngologica, 1991
To test the hypothesis that auditory inputs can interact with the optokinetically or vestibularly-charged human VSM, we examined the effects of sound on rotational nystagmus and HOKAN. Subjects were rotated at 60 degrees/s, in either clockwise (CW) or counterclockwise (CCV) direction, for a total of 3 min.
R, Jell, S, Lafortune, G, Wei, D, Ireland   +3 more
  +7 more sources

Velocity Storage in Labyrinthine Disorders^a

Annals of the New York Academy of Sciences, 1992
We studied 13 patients with unilateral peripheral vestibular lesions following removal of acoustic neurinomas. The time constant of the VOR after surgery was 6.4 +/- 2.6 seconds (normal is 18.5 +/- 7.7 seconds). The time constant of OKAN after surgery was 7.2 +/- 1.8 seconds (normal is 11.3 +/- 3.2 seconds).
T C, Hain, D S, Zee
openaire   +2 more sources

The Critical Role of Velocity Storage in Production of Motion Sickness

Annals of the New York Academy of Sciences, 2003
AbstractWe propose that motion sickness is mediated through the orientation properties of velocity storage in the vestibular system that tend to align eye velocity produced by the angular vestibulo‐ocular reflex (aVOR) with gravito‐inertial acceleration (GIA). (GIA is the sum of the linear accelerations acting on the head.
Bernard, Cohen, Mingjia, Dai, Theodore, Raphan   +2 more
openaire   +2 more sources

Velocity storage in the vestibulo-ocular reflex arc (VOR)

Experimental Brain Research, 1979
Vestibular and optokinetic nystagmus (OKN) of monkeys were induced by platform and visual surround rotation. Vision prolonged per-rotatory nystagmus and cancelled or reduced post-rotatory nystagmus recorded in darkness. Presumably, activity stored during OKN summed with activity arising in the semicircular canals.
T, Raphan, V, Matsuo, B, Cohen
openaire   +2 more sources

Velocity storage in the human vertical rotational vestibulo-ocular reflex

Experimental Brain Research, 2010
Human horizontal rotational vestibulo-ocular reflex (rVOR) has been extensively investigated: the horizontal semicircular canals sense yaw rotations with high-pass filter dynamics and a time constant (TC) around 5 s, yet the rVOR response shows a longer TC due to a central processing stage, known as velocity storage mechanism (VSM).
BERTOLINI, GIOVANNI, RAMAT, STEFANO
openaire   +3 more sources

The relation of motion sickness to the spatial?temporal properties of velocity storage

Experimental Brain Research, 2003
Tilting the head in roll to or from the upright while rotating at a constant velocity (roll while rotating, RWR) alters the position of the semicircular canals relative to the axis of rotation. This produces vertical and horizontal nystagmus, disorientation, vertigo, and nausea.
Mingjia, Dai, Mikhail, Kunin, Theodore, Raphan, Bernard, Cohen   +3 more
openaire   +2 more sources