Derivation and modeling of two new features for the characterization of rapid and slow eye movements in electrooculographic sleep recordings

2017 ◽  
Vol 35 ◽  
pp. 87-99 ◽  
Author(s):  
Diego Alvarez-Estevez ◽  
Irma van Velzen ◽  
Truus Ottolini-Capellen ◽  
Bob Kemp
Keyword(s):  
Eye Movements ◽  
Slow Eye Movements

An improved algorithm for the automatic detection and characterization of slow eye movements

2014 ◽  
Vol 36 (7) ◽  
pp. 954-961 ◽  
Author(s):  
Filippo Cona ◽  
Fabio Pizza ◽  
Federica Provini ◽  
Elisa Magosso
Keyword(s):  
Eye Movements ◽  
Automatic Detection ◽  
Slow Eye Movements ◽  
Improved Algorithm

Visually evoked slow eye movements, visual-vestibular interaction, and infratentorial lesions

1983 ◽  
Vol 91 (1) ◽  
pp. 76-80 ◽  
Author(s):  
Carsten Wennmo ◽  
Nils Gunnar Henriksson ◽  
Bengt Hindfelt ◽  
Ilmari PyykkÖ ◽  
MÅNs Magnusson
Keyword(s):  
Eye Movements ◽  
Phase Velocity ◽  
Brain Stem ◽  
Smooth Pursuit ◽  
Maximum Velocity ◽  
Slow Phase ◽  
Slow Phase Velocity ◽  
Velocity Gain ◽  
Visual Vestibular Interaction ◽  
Slow Eye Movements

The maximum velocity gain of smooth pursuit and optokinetic, vestibular, and optovestibular slow phases was examined in 15 patients with pontine, 10 with medullary, 10 with cerebellar, and 5 with combined cerebello — brain stem disorders. Marked dissociations were observed between smooth pursuit and optokinetic slow phases, especially in medullary disease. A cerebellar deficit enhanced slow phase velocity gain during rotation in darkness, whereas the corresponding gain during rotation in light was normal.

Statocyst-Induced Eye Movements in the Crab Scylla Serrata

1972 ◽  
Vol 57 (1) ◽  
pp. 187-204
Author(s):  
D. C. SANDEMAN ◽  
A. OKAJIMA
Keyword(s):  
Eye Movements ◽  
Direct Observation ◽  
Sensory Input ◽  
Vertical Axis ◽  
Central Mechanism ◽  
Scylla Serrata

1. Irrigation of the statocysts of the crab Scylla serrata will activate the oculomotor neurones associated with eye movements. 2. An investigation of the central mechanism of statocyst-induced nystagmus has been started with the description of the statocyst canals and a characterization of the sensory input from the hair receptors in the canals. 3. The canals are shaped like two toroids joined at approximately right angles to one another. Direct observation of isolated statoliths and glass models of them shows that when they are rotated, fluid moves around the circumference of the statocyst canals and displaces the hair receptors protruding into them. The direction of displacement of the different groups of receptors in both statocysts is related to the axes of rotation and provides a unique output for rotation about each axis. 4. Electrical recordings from the three types of receptor hairs show that the thread hairs are most probably the receptors responsible for detection of rotation about the vertical axis. The free hook hairs are sensitive enough to detect rotation about the horizontal axes. The statolith hairs are sensitive to maintained changes of position.

scholarly journals Continuous Updating of Visuospatial Memory in Superior Colliculus during Slow Eye Movements

2015 ◽  
Vol 25 (3) ◽  
pp. 267-274 ◽  
Author(s):  
Suryadeep Dash ◽  
Xiaogang Yan ◽  
Hongying Wang ◽  
John Douglas Crawford
Keyword(s):  
Eye Movements ◽  
Superior Colliculus ◽  
Visuospatial Memory ◽  
Slow Eye Movements

scholarly journals Pursuit disorder and saccade dysmetria after caudal fastigial inactivation in the monkey

2018 ◽  
Vol 120 (4) ◽  
pp. 1640-1654 ◽  
Author(s):  
Clara Bourrelly ◽  
Julie Quinet ◽  
Laurent Goffart
Keyword(s):  
Eye Movements ◽  
Eye Movement ◽  
Visual Target ◽  
Fastigial Nucleus ◽  
Gaze Direction ◽  
Moving Target ◽  
Horizontal Meridian ◽  
Pursuit Eye Movements ◽  
Neural Processes ◽  
Slow Eye Movements

The caudal fastigial nuclei (cFN) are the output nuclei by which the medio-posterior cerebellum influences the production of saccadic and pursuit eye movements. We investigated the consequences of unilateral inactivation on the pursuit eye movement made immediately after an interceptive saccade toward a centrifugal target. We describe here the effects when the target moved along the horizontal meridian with a 10 or 20°/s speed. After muscimol injection, the monkeys were unable to track the present location of the moving target. During contralesional tracking, the velocity of postsaccadic pursuit was reduced. This slowing was associated with a hypometria of interceptive saccades such that gaze direction always lagged behind the moving target. No correlation was found between the sizes of saccade undershoot and the decreases in pursuit speed. During ipsilesional tracking, the effects on postsaccadic pursuit were variable across the injection sessions, whereas the interceptive saccades were consistently hypermetric. Here also, the ipsilesional pursuit disorder was not correlated with the saccade hypermetria either. The lack of correlation between the sizes of saccade dysmetria and changes of postsaccadic pursuit speed suggests that cFN activity exerts independent influences on the neural processes generating the saccadic and slow eye movements. It also suggests that the cFN is one locus where the synergy between the two motor categories develops in the context of tracking a moving visual target. We explain how the different fastigial output channels can account for these oculomotor tracking disorders. NEW & NOTEWORTHY Inactivation of the caudal fastigial nucleus impairs the ability to track a moving target. The accuracy of interceptive saccades and the velocity of postsaccadic pursuit movements are both altered, but these changes are not correlated. This absence of correlation is not compatible with an impaired common command feeding the circuits producing saccadic and pursuit eye movements. However, it suggests an involvement of caudal fastigial nuclei in their synergy to accurately track a moving target.

Visual and computer-based detection of slow eye movements in overnight and 24-h EOG recordings

2007 ◽  
Vol 118 (5) ◽  
pp. 1122-1133 ◽  
Author(s):  
E. Magosso ◽  
M. Ursino ◽  
A. Zaniboni ◽  
F. Provini ◽  
P. Montagna
Keyword(s):  
Eye Movements ◽  
Computer Based ◽  
Slow Eye Movements
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