Orientational asymmetries in small-field optokinetic nystagmus in human infants

  title={Orientational asymmetries in small-field optokinetic nystagmus in human infants},
  author={Louise Hainline and Elizabeth A. Lemerise and Israel Abramov and Joseph Turkel},
  journal={Behavioural Brain Research},
Vertical optokinetic nystagmus and saccades in normal human subjects.
The dynamic properties of vertical quick phases of nystagmus are similar enough to those of voluntary saccades for OK stimulation to be used as a clinical test of the vertical saccadic system in individuals with voluntary gaze palsy.
Horizontal and vertical look and stare optokinetic nystagmus symmetry in healthy adult volunteers.
PURPOSE Look optokinetic nystagmus (OKN) consists of voluntary tracking of details in a moving visual field, whereas stare OKN is reflexive and consists of shorter slow phases of lower gain.
Up-down asymmetry in human vertical optokinetic nystagmus and afternystagmus: contributions of the central and peripheral retinae
The disappearance of the upward preponderance in OKN and OKAN with occlusion of the peripheral retina suggests that the directional asymmetry in vertical OKN exists in the slow OKN system.
Horizontal and vertical optokinetic eye movements in macaque monkeys with infantile strabismus: directional bias and crosstalk.
PURPOSE Optokinetic eye movements stabilize gaze by tracking motion of the visual scene during sustained movement of a creature's body. The purpose of this study was to describe vertical and
[Quantitative analysis of horizontal and vertical optokinetic nystagmus and optokinetic after-nystagmus in the cat].
OKN in cats was composed of both a direct pathway and an indirect pathway and both the direct and indirect pathways of cats were smaller than those of monkeys, suggesting that the differences in OKN between cats and monkeys were mainly responsible for the direct pathway.
OKN Asymmetry in Human Subjects: A Literature Review
The literature review was carried out to determine whether a vertical OKN asymmetry exists in healthy subjects and to explain any anomalous findings.
Maldevelopment of visual motion processing in humans who had strabismus with onset in infancy
  • L. Tychsen, S. Lisberger
  • Psychology
    The Journal of neuroscience : the official journal of the Society for Neuroscience
  • 1986
De deficits in visual motion processing are reported in 7 adult humans who lacked binocularity in infancy because of strabismus who had abnormalities in the relative effectiveness of different parts of the visual field for initiating both horizontal and vertical pursuit.


Disturbances of small-field horizontal and vertical optokinetic nystagmus in amblyopia.
Comparisons between the frequency response for OKN and the contrast sensitivity function for perceived motion revealed that amblyopes with asymmetric OKN had equal sensitivity to nasal and temporal target motion.
Comparison of vertical and horizontal optokinetic nystagmus in the squirrel monkey.
Squirrel monkeys showed similar findings to cats, in which vertical optokinetic nystagmus (VOKN) is not as well elicited as horizontal optokinetics ny STG (HOKN), and down-pursuit OKN is poorer than up-purgation OKN.
Vertical optokinetic nystagmus
This paper presents an electro-oculographic study of the vertical optokinetic responses in normal individuals in order to further evaluate this problem and suggest abnormalities in the vertical responses may have diagnostic significance.
Smooth-pursuit eye movements in the newborn infant.
Infant optokinetic nystagmus differed strikingly from that of adults in that tonic ocular deviation was in the direction of field movement rather than away from it, which suggests that the relatively poor smooth-pursuit performance of newborns may be related to foveal immaturity.
Optokinetic Nystagmus and Single-cell Responses in the Nucleus Tractus Opticus After Early Monocular Deprivation in the Cat
The normal cat’s optokinetic nystagmus (OKN) can be elicited in the two horizontal directions even if one eye is stimulated alone. After early monocular deprivation OKN is only elicited by patterns
Experimental studies on optokinetic nystagmus. II. Normal humans.
Two different sets of optokinetic nystagmus responses were obtained that corresponded to the two patterns observed in the Group I experiments, and whether “stare” or “look” the responses of the individuals showed a similar pattern.
Horizontal and vertical optokinetic nystagmus in man.
The inferiority of vertical OKN seems to indicate a suppression of optokinetic pursuit due to a different direction of the rotational axis from that of gravity.
Some characteristics of optokinetic eye-movement patterns: a comparative study.
Responses of animals and men to durations of OPK stimulation varying between 15-120 seconds were examined to differentiate aspects of the eye-movement responses which can be attributed primarily to vestibular rather than oculo-motor origins.