3 edition of On the visual input driving human smooth-pursuit eye movements found in the catalog.
On the visual input driving human smooth-pursuit eye movements
Leland S. Stone
1996 by National Aeronautics and Space Administration, Ames Research Center, National Technical Information Service, distributor in Moffett Field, Calif, [Springfield, Va .
Written in English
|Statement||Leland S. Stone, Brent R. Beutter, and Jean Lorenceau.|
|Series||NASA technical memorandum -- 110424|
|Contributions||Beutter, Brent R., Lorenceau, Jean., Ames Research Center.|
|The Physical Object|
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On The Visual Input Driving Human Smooth-Pursuit Eye Movements. LELAND S. STONE, BRENT R. BEUTTER, AND JEAN LORENCEAU Ames Research Center Summary Current computational models of smooth-pursuit eye movements assume that the primary visual input is local retinal-image motion (often referred to as retinal slip).
Cited by: 7. On the Visual Input Driving Human Smooth-Pursuit Eye Movements Current computational models of smooth-pursuit eye movements assume that the primary visual input is local retinal-image motion (often referred to as retinal slip).
However, we show that humans can On the visual input driving human smooth-pursuit eye movements book object motion with considerable accuracy, even in the presence of conflicting local image by: 7. On the visual input driving human smooth-pursuit eye movements by Leland S.
Stone,National Aeronautics and Space Administration, Ames Research Center, National Technical Information Service, distributor edition, Microform in English.
Author(s): Stone,L S; Beutter,B R; Lorenceau,J; United States. National Aeronautics and Space Administration. Ames Research Center.
Investigator(s): Stone,L S; ARC. in visual motion perception as well as pursuit initiation. Therefore, the pur-pose of this study is to determine whether directional asymmetry in pursuit initiation is associated with visual motion perception.
We used a step-ramp paradigm to induce horizontal smooth pursuit eye movements and then tested visual motion reaction time (RT). Cited by: 5. Click on the article title to read more.
The Oxford Handbook of Eye Movements. Simon Liversedge, Iain Gilchrist, Stefan Everling. OUP Oxford, - Medical - pages. 0 Reviews. In the past few years, there has been an explosion of eye movement research in cognitive science and neuroscience.
This has been due to the availability of 'off the shelf' eye trackers, along with. The human eye moves 34 times per second on average, smooth pursuit and visual search tasks as described below (details in Methods, study 2).
To investigate smooth pursuit eye. In a follow-up study, the authors suggest that head movements do not require continued visual input but instead rely on extraretinal (internal) information during pursuit (Ackerley and Barnes. One problem the comparator solves is that of an object in motion appearing stationary because its motion on the retina is removed via smooth pursuit eye movements.
When an eye movement is planned, one copy of the movement command goes to the eye muscles, and the other goes to an area of the visual system called the comparator. Knox PC () The effect of the gap paradigm on the latency of human smooth pursuit of eye movement. NeuroReport PubMed CrossRef Google Scholar Komatsu H, Wurtz RH (a) Relation of cortical areas MT and MST to pursuit eye movements I.
Localization and visual properties of neurons. perception is achieved by a coordination of smooth pursuit and saccadic eye movements. Pursuit serves the purpose of reducing retinal motion of objects we look at.
Initiation of smooth pursuit differs from On the visual input driving human smooth-pursuit eye movements book initia-tion in many ways. Among other things, pursuit is initiated with shorter latencies and is mainly driven by a velocity signal.
[Show full abstract] eye movements per se. VON uses a head-mounted motion sensor, laptop computer with user input control, and laser target whose position is controlled by the computer. As the. Initial eye acceleration. 0 to 20 ms. Typical values for initial eye acceleration are. degsec. Initial 20 to 40 msec.
It is independent of the target stimulus. Functions to initiate an eye movement in the correct direction. Onset of pursuit. The later 60ms period is loosely related to target velocity. the only disconjugate eye movement. This means that during vergence movements, the eyes move in different direction.
Saccades, smooth pursuit, and other movements that will be discussed shortly are all conjugate eye movements (moves in the same direction). Vergence movement often works with saccades and smooth pursuit movements. During a. BIOL PSYCHIATRY ; Smooth Pursuit Eye Movement Disorder and Its Psychobiologic Correlates in Unmedicated Schizophrenics Larry J.
Siever, Daniel P. van Kämmen, Markku Linnoila, Ina Alterman, Theodore Hare, and Dennis L. Murphy The accuracy of smooth pursuit eye movements (SPEMs) was evaluated electrooculo- graphically in 14 medication-free. Whereas, with most eye-movement tasks, even when the eyetracker is sampling at Hz or higher, the eye movement pattern usually only gives new information about what objects are "attracting" attention about times per second, i.when a saccade moves the eyes to a new fixation (but cf.
Theeuwes, Olivers Chizk, ; Doyle Walker, Outcome measures in visual neglect (digit cancellation, visuoperceptual- and motor line bisection, paragraph reading) and auditory neglect (auditory midline) were assessed twice before therapy, thereafter, and at 2-week follow-up.
The SPT group practiced smooth pursuit eye movements while tracking stimuli moving leftward. Visual short-term memory (VSTM) was probed while observers performed smooth pursuit eye movements.
Smooth pursuit keeps a moving object stabilized in the fovea. VSTM capacity for position was reduced during smooth pursuit compared with a condition with eye fixation. There was no difference between a condition in which the items were approximately stabilized on the retina because.
During the initial period of about ms, pursuit eye movements are controlled by motion signals, whereas visual feedback, such as retinal slip, influences eye movements during later periods (Lisberger, Morris, Tychsen, ; Lisberger Westbrook, ).
This raises the possibility that the relationship between perception and pursuit eye. tion of smooth pursuit gain was made from the chart (speed ofthe chartpaper 10 mms).
Furthermore, an index of asymmetry of smoothpursuitwasdefined as: right gain-left gain x right gain left gain Vertical saccades and smoothpursuit were recorded under the same conditions as for horizontal eye movements, but only qualita-tively analysed.
Anticipatory smooth pursuit eye movements in the direction of expected target motion can be elicited by symbolic visual or auditory cues (Kowler, ). Stimuli in these studies, small targets moving against dark or structured backgrounds, convey the perceptual impression of an object moving across space.
Conjugate eye movements are of two types: saccadic and smooth pursuit. The function of saccadic eye movements is to rapidly acquire objects in the visual scene for central viewing so that they may be analyzed in detail.
The function of the smooth pursuit system is to maintain a moving object in central view as in the case of tracking a bird in. Two eye movement systems cooperate to achieve foveation if the goal stimulus is moving: the saccadic (SAC) and the smooth pursuit eye movement (SPEM). The SAC eye movement system generates ballistic, high-velocity, open-loop ocular rotations that quickly cancel the difference between the initial angle of gaze and the angle needed to foveate the.
Subjects instructed to imagine a beating pendulum develop pursuit eye movements of a frequency comparable to the frequency of a previously visualized real pendulum. The appearance of pursuit rather than saccadic movements supports an "outflow" theory for central control of eye movement and suggests an objective technique for the identification of certain types of visual imagery.
No further explanation has been given for the smooth pursuit movement disorder in this experiment because of the small sample; however, the results were consistent with the findings of Takarae et al, 83 who studied pursuit eye movement in 60 individuals with ASD (mean age of 20 years) and compared them to an age- and gender-matched control.
Using eye movements parameters to assess monitoring behavior for flight crew selection. Hinnerk Eißfeldt. Carmen Bruder. Hinnerk Eißfeldt. Carmen Bruder. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 35 Full PDFs related to this paper. READ PAPER.
The invention describes the process of applying smooth pursuit eye movement tests toward the detection of the efficacy and, or, toxicity of neuro-pharmaceutical compounds throughout the clinical drug development process. Several different paradigms in smooth pursuit tracking tests and several analysis methods and metrics may be used.
Eye movements alter visual perceptions in a number of ways. During smooth-pursuit eye movements, previous studies reported decreased detection threshold for colored stimuli and for high-spatial-frequency luminance stimuli, suggesting a boost in the parvocellular system.
Modeling Eye Movements In Driving by Leandro A. Veltri Submitted to the Department of Electrical Engineering and Computer Science how the introduction of a HUD into the visual environment will affect these tasks. The current work will improve general knowledge of driver's eye movements in control tasks, and provide a framework for the.
In previous studies, smooth pursuit eye movements (SPEM) have been shown to be disordered in about 70 of schizophrenics and about 45 of their first-degree relatives. In this report, the role of attention in these eye movements is addressed in three experiments (using as subjects schizophrenics.
The adapted heterophoria is coupled to vary with both eye position and direction of eye movement. C Neuro-control of smooth foveal tracking 1 Smooth pursuit tracking system. Smooth following eye movements result from cortical motion signals in extrastriate cortex in areas MT and MST that lie in the superior temporal sulcus.
The visual system consists of a number of parallel pathways, each serving a specific function. Parallel processing of visual information already is present at the level of the retina (Figs. ). The structure and function of the retina have been reviewed extensively [ 54, ].
Visual perception of depth from lateral observer translation uses both retinal image motion and eye movement. In Nawrot and Stroyan (Vision Res) we showed that the ratio of the rate of retinal motion over the rate of smooth eye pursuit determines depth relative to.
This book presents the most recent approaches that have changed our view of biological motion processing.
DOWNLOAD NOW» Author: Guillaume S. Masson. Publisher: Springer Science Business Media ISBN: Category: Medical Page: View: Motion processing is an essential piece of the complex brain machinery that allows us to reconstruct the 3D layout of objects in the.
Vision Res. Jul;12(7) Release of pursuit eye movements using after-images. Steinbach MJ, Pearce DG. PMID: [Indexed for MEDLINE]. The inferior parietal lobule of the monkey (area 7a) contains neurons that discharge during attentive visual fixation, in relation to saccades, or during smooth-pursuit tracking (Fig.
Neurons that discharge in relationship to saccades usually do so after the eye movement is made (Lynch et al.; Andersen, ). Visual Lead A visual lead is an area targeted 20 to 30 seconds from the front of the vehicle. The novice driver needs to develop a visual lead in order to keep steering reversals to a minimum.
With very little free play in new vehicle steering mechanisms, it becomes critical to limit wheel movements to the left and right of the path of travel. Understanding smooth eye pursuit Jul 2, - AM a classic question of human motor control.
The study shows that two distinctly different ways of seeing motion are used one to catch up to a moving object with our eyes, a second to lock on and examine it. this research sets the stage for future studies of genetic and. In one aspect, the systems, environment, and methods described herein support anticipation and identification of adverse health events andor atypical behavioral episodes such as Autistic behaviors, epileptic seizures, heart attack, stroke, andor narcoleptic sleep attacks using a portable data collection device.
In another aspect, the systems, environment, and methods described herein. Pursuit eye movements prevent slipping of an image on the retina while the patient is tracking moving objects.
The neural substrate of the pursuit system includes the parietal cortex, the.Significant reductions in human visual gamma frequency by the GABA reuptake inhibitor tiagabine revealed by robust peak frequency estimation. Human Brain Mapping 37(11), pp. (/hbm) Powell, al.
Interaction between contours and eye movements in the perception of afterimages: A test of the signal ambiguity theory.The Sensing Eye and the Perceiving Visual Cortex. As you can see in Figure "Anatomy of the Human Eye", light enters the eye through the cornea, a clear covering that protects the eye and begins to focus the incoming light.
The light then passes through the pupil, a small opening in the center of the pupil is surrounded by the iris, the colored part of the eye that controls the size.