Eye Movement Measurements: Methods and procedures for recording EYE MOVEMENTS.Eye Movements: Voluntary or reflex-controlled movements of the eye.Movement: The act, process, or result of passing from one place or position to another. It differs from LOCOMOTION in that locomotion is restricted to the passing of the whole body from one place to another, while movement encompasses both locomotion but also a change of the position of the whole body or any of its parts. Movement may be used with reference to humans, vertebrate and invertebrate animals, and microorganisms. Differentiate also from MOTOR ACTIVITY, movement associated with behavior.Eye: The organ of sight constituting a pair of globular organs made up of a three-layered roughly spherical structure specialized for receiving and responding to light.Saccades: An abrupt voluntary shift in ocular fixation from one point to another, as occurs in reading.Pursuit, Smooth: Eye movements that are slow, continuous, and conjugate and occur when a fixed object is moved slowly.Fixation, Ocular: The positioning and accommodation of eyes that allows the image to be brought into place on the FOVEA CENTRALIS of each eye.Sleep, REM: A stage of sleep characterized by rapid movements of the eye and low voltage fast pattern EEG. It is usually associated with dreaming.Electrooculography: Recording of the average amplitude of the resting potential arising between the cornea and the retina in light and dark adaptation as the eyes turn a standard distance to the right and the left. The increase in potential with light adaptation is used to evaluate the condition of the retinal pigment epithelium.Photic Stimulation: Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity.Head Movements: Voluntary or involuntary motion of head that may be relative to or independent of body; includes animals and humans.Ocular Motility Disorders: Disorders that feature impairment of eye movements as a primary manifestation of disease. These conditions may be divided into infranuclear, nuclear, and supranuclear disorders. Diseases of the eye muscles or oculomotor cranial nerves (III, IV, and VI) are considered infranuclear. Nuclear disorders are caused by disease of the oculomotor, trochlear, or abducens nuclei in the BRAIN STEM. Supranuclear disorders are produced by dysfunction of higher order sensory and motor systems that control eye movements, including neural networks in the CEREBRAL CORTEX; BASAL GANGLIA; CEREBELLUM; and BRAIN STEM. Ocular torticollis refers to a head tilt that is caused by an ocular misalignment. Opsoclonus refers to rapid, conjugate oscillations of the eyes in multiple directions, which may occur as a parainfectious or paraneoplastic condition (e.g., OPSOCLONUS-MYOCLONUS SYNDROME). (Adams et al., Principles of Neurology, 6th ed, p240)Reflex, Vestibulo-Ocular: A reflex wherein impulses are conveyed from the cupulas of the SEMICIRCULAR CANALS and from the OTOLITHIC MEMBRANE of the SACCULE AND UTRICLE via the VESTIBULAR NUCLEI of the BRAIN STEM and the median longitudinal fasciculus to the OCULOMOTOR NERVE nuclei. It functions to maintain a stable retinal image during head rotation by generating appropriate compensatory EYE MOVEMENTS.Sleep Stages: Periods of sleep manifested by changes in EEG activity and certain behavioral correlates; includes Stage 1: sleep onset, drowsy sleep; Stage 2: light sleep; Stages 3 and 4: delta sleep, light sleep, deep sleep, telencephalic sleep.Nystagmus, Optokinetic: Normal nystagmus produced by looking at objects moving across the field of vision.Motion Perception: The real or apparent movement of objects through the visual field.Convergence, Ocular: The turning inward of the lines of sight toward each other.Reaction Time: The time from the onset of a stimulus until a response is observed.Oculomotor Muscles: The muscles that move the eye. Included in this group are the medial rectus, lateral rectus, superior rectus, inferior rectus, inferior oblique, superior oblique, musculus orbitalis, and levator palpebrae superioris.Psychomotor Performance: The coordination of a sensory or ideational (cognitive) process and a motor activity.Wakefulness: A state in which there is an enhanced potential for sensitivity and an efficient responsiveness to external stimuli.Macaca mulatta: A species of the genus MACACA inhabiting India, China, and other parts of Asia. The species is used extensively in biomedical research and adapts very well to living with humans.Nystagmus, Pathologic: Involuntary movements of the eye that are divided into two types, jerk and pendular. Jerk nystagmus has a slow phase in one direction followed by a corrective fast phase in the opposite direction, and is usually caused by central or peripheral vestibular dysfunction. Pendular nystagmus features oscillations that are of equal velocity in both directions and this condition is often associated with visual loss early in life. (Adams et al., Principles of Neurology, 6th ed, p272)Nystagmus, Physiologic: Involuntary rhythmical movements of the eyes in the normal person. These can be naturally occurring as in end-position (end-point, end-stage, or deviational) nystagmus or induced by the optokinetic drum (NYSTAGMUS, OPTOKINETIC), caloric test, or a rotating chair.Visual Perception: The selecting and organizing of visual stimuli based on the individual's past experience.Sleep: A readily reversible suspension of sensorimotor interaction with the environment, usually associated with recumbency and immobility.Vision, Binocular: The blending of separate images seen by each eye into one composite image.Eye Diseases: Diseases affecting the eye.Abducens Nerve: The 6th cranial nerve which originates in the ABDUCENS NUCLEUS of the PONS and sends motor fibers to the lateral rectus muscles of the EYE. Damage to the nerve or its nucleus disrupts horizontal eye movement control.Eye Movement Desensitization Reprocessing: A technique that induces the processing of disturbing memories and experiences, by stimulating neural mechanisms that are similar to those activated during REM sleep. The technique consists of eye movements following side-to-side movements of the index and middle fingers, or the alternate tapping of the hands on the knees. This procedure triggers the processing of information, thus facilitating the connection of neural networks.Rotation: Motion of an object in which either one or more points on a line are fixed. It is also the motion of a particle about a fixed point. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Visual Fields: The total area or space visible in a person's peripheral vision with the eye looking straightforward.Oculomotor Nerve: The 3d cranial nerve. The oculomotor nerve sends motor fibers to the levator muscles of the eyelid and to the superior rectus, inferior rectus, and inferior oblique muscles of the eye. It also sends parasympathetic efferents (via the ciliary ganglion) to the muscles controlling pupillary constriction and accommodation. The motor fibers originate in the oculomotor nuclei of the midbrain.Electroencephalography: Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain.Attention: Focusing on certain aspects of current experience to the exclusion of others. It is the act of heeding or taking notice or concentrating.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Reading
Nystagmus In Infancy and Childhood - Richard W. Hertle MD, FACS, FAAO, FAAP; Louis F. Dell'Osso, PhD - Oxford University Press184.108.40.206 Eye-Movement Recordings. 220.127.116.11 Head-Posture Measurements (18.104.22.168 Laboratory and Special Tests 7.2.4 Results. 22.214.171.124 ... F.1.1 #011105 Recording and Calibrating the Eye Movements of Nystagmus Subjects. F.1.2 #111005 Using the NAFX for Eye-Movement ... CV6 RPE65-deficient canine: pre-gene therapy eye movements. CV7 RPE65-deficient canine: post-gene therapy eye movements. CV8 ... 126.96.36.199 Eye-Movement Recordings. 188.8.131.52 Head-Posture Measurements. 7.2.5 Complications. 7.3 OTHER. 7.3.1 Biofeedback. 7.3.2 ...
Patent US6043800 - Head mounted liquid crystal display system - Google PatentsVisor and camera providing a parallax-free field-of-view image for a head-mounted eye movement measurement system. ... Apparatus being controlled by movement of the eye. US4181405 *. Aug 7, 1978. Jan 1, 1980. The Singer Company. Head-up viewing ... one component being directed to the left eye, and another component being directed to the right eye. This provides a more ... CCD Head and eye position indicator. US4636866 *. Dec 22, 1983. Jan 13, 1987. Seiko Epson K.K.. Personal liquid crystal image ...
Digital Human Modeling: Applications in Health, Safety, Ergonomics and Risk Management | SpringerLinkStudy on Braiding Skills by Comparing Between Expert and Non-experts with Eye's Movement Measurement ...
Patent US4299237 - Closed flow caloric test device - Google PatentsNystagmus is a regular, alternating eye movement of variable velocity which can be induced by many known methods. It is well- ... Measurement of nystagmus can be done visually or by electronic apparatus, either of which may be employed in conjunction with ... means for indicating the amount of movement of said end wall section relative to said proximal part when said wall section is ... Apparatus as recited in claim 1, including means for indicating the amount of movement of said end wall section relative to ...
Marketers Look Into Consumers' Eyes | News & Features | Sep 2004 | Photonics.comJapanese company is honing consumer psychology to an even more precise science with technology that records how someone's eyes ... typically to within 1 cm of movement on a normal computer screen), which gives insight into eye movement and where attention is ... Browse by Subject Lasers Optics Imaging Biophotonics Industrial Sensors & Detectors Test & Measurement Light Sources Fiber ... The Eye-Trackers camera used in the JCMR Eye-Tracking Solution does not require special headgear to be worn by the consumer ...
Patente US20080027347 - Minimally Invasive Monitoring Methods - Google Patentes... follow-up measurement (Step 206, 208). At step 210, the baseline data measurement and the follow-up data measurement may be ... gross body movements), movement of organs or other bodily fluids (e.g., heart, lungs, blood flow), and thermal sources in the ... eye-blink artifacts, chewing, etc.) so as to prevent contamination of the high frequency components of the sampled EEG signals ... At step 170, the baseline measurement is compared to the follow-up measurement to evaluate the therapy. If the comparison ...
Selective Blockade of 5-Hydroxytryptamine (5-HT)7 Receptors Enhances 5-HT Transmission, Antidepressant-Like Behavior, and Rapid...In rats, SB-269970 potentiated the increase of rapid eye movement (REM) latency and the REM sleep decrease induced by ... The tail suspension test and locomotor activity measurements were performed in male C57BL/6J mice (The Jackson Laboratory, Bar ... and Rapid Eye Movement Sleep Suppression Induced by Citalopram in Rodents. Pascal Bonaventure, Lisa Kelly, Leah Aluisio, ... and Rapid Eye Movement Sleep Suppression Induced by Citalopram in Rodents. Pascal Bonaventure, Lisa Kelly, Leah Aluisio, ...
Sleep-Disordered Breathing in Patients With Acute Supra- and Infratentorial Strokes | StrokeMonitoring of breathing during wakefulness, non-rapid eye movement sleep, and rapid eye movement sleep included measurements of ... Severe obstructive apnea during REM sleep with paradoxical movements of the chest and abdomen and severe oxygen desaturation ... Fourth, endoesophageal pressure monitoring, tidal volume measurements, gasometric analyses, continuous CO2 recordings, and ...
SR ResearchWhat the eyes already 'know': using eye movement measurement to tap into children's implicit numerical magnitude ... Developmental changes in the control of saccadic eye movements in response to directional eye gaze and arrows. The Quarterly ... Detecting age-related neurodegenerative eye disease using eye movement scanpaths. Frontiers in Aging Neuroscience, 6, 312. doi: ... Chan, J. P. K., Kamino, D., Binns, M. A., & Ryan, J. D. (2011) Can changes in eye movement scanning alter the age-related ...
JoVE | Peer Reviewed Scientific Video Journal - Methods and Protocols... since it requires measurement of eye movements in a head unrestrained condition. Studies demonstrated that unrestrained head ... Eye movement monitoring procedures begin with the placement of the eye tracker on the participant, and setup of the head and ... Eye movement monitoring (eye tracking) provides a tool by which memory can be probed without asking participants to comment on ... Twenty percent of the neurons in each of these structures showed eye movement-related activity. Neurons related to scanning eye ...
Voluntary Parenthood League: The Voluntary Parenthood League (VPL) was an organization that advocated for contraception during the birth control movement in the United States. The VPL was founded in 1919 by Mary Dennett.Guiding Eyes for the Blind: Yorktown Heights, New YorkSaccade: A saccade ( , French for jerk) is quick, simultaneous movement of both eyes between two phases of fixation in the same direction.Cassin, B.Marion ClignetElectrooculographyFall Heads Roll: Fall Heads Roll is an album by The Fall, released in 2005. It was recorded at Gracieland Studios in Rochdale, UK and Gigantic Studios in New York, NY.Conjugate gaze palsyVision in fishes: Vision is an important sensory system for most species of fish. Fish eyes are similar to terrestrial vertebrates like birds and mammals, but have a more spherical lens.Optokinetic reflexBiological motion: Biological motion is a term used by social and cognitive neuroscientists to refer to the unique visual phenomenon of a moving, animate object. Often, the stimuli used in biological motion experiments are just a few moving dots that reflect the motion of some key joints of the moving organism.Convergence of measures: In mathematics, more specifically measure theory, there are various notions of the convergence of measures. For an intuitive general sense of what is meant by convergence in measure, consider a sequence of measures μn on a space, sharing a common collection of measurable sets.Inferior rectus muscle: The inferior rectus muscle is a muscle in the orbit.NystagmusAlexander's law: Jacobson GP et al. Alexander's law revisited.Non-rapid eye movement sleepBinocular vision: Binocular vision is vision in which creatures having two eyes use them together. The word binocular comes from two Latin roots, bini for double, and oculus for eye.Neuro-ophthalmology: Neuro-ophthalmology is an academically-oriented subspecialty that merges the fields of neurology and ophthalmology, often dealing with complex systemic diseases that have manifestations in the visual system. Neuro-ophthalmologists initially complete a residency in either neurology or ophthalmology, then do a fellowship in the complementary field.Abducens nucleus: The abducens nucleus is the originating nucleus from which the abducens nerve (VI) emerges - a cranial nerve nucleus. This nucleus is located beneath the fourth ventricle in the caudal portion of the pons, medial to the sulcus limitans.Traumatic memories: The management of traumatic memories is important when treating mental health disorders such as post traumatic stress disorder. Traumatic memories can cause life problems even to individuals who do not meet the diagnostic criteria for a mental health disorder.Doxanthrine: Doxanthrine is a synthetic compound which is a potent and selective full agonist for the dopamine D1 receptor. Doxanthrine has been shown to be orally active in producing contralateral rotation in the 6-hydroxy-dopamine rat model of Parkinson's disease.Meridian (perimetry, visual field): Meridian (plural: "meridians") is used in perimetry and in specifying visual fields. According to IPS Perimetry Standards 1978 (2002): "Perimetry is the measurement of [an observer's] visual functions ...Oculomotor nucleus: The fibers of the oculomotor nerve arise from a nucleus in the midbrain, which lies in the gray substance of the floor of the cerebral aqueduct and extends in front of the aqueduct for a short distance into the floor of the third ventricle. From this nucleus the fibers pass forward through the tegmentum, the red nucleus, and the medial part of the substantia nigra, forming a series of curves with a lateral convexity, and emerge from the oculomotor sulcus on the medial side of the cerebral peduncle.Quantitative electroencephalography: Quantitative electroencephalography (QEEG) is a field concerned with the numerical analysis of electroencephalography data and associated behavioral correlates.Gary H. Posner: Gary H. Posner (born c.Temporal analysis of products: Temporal Analysis of Products (TAP), (TAP-2), (TAP-3) is an experimental technique for studyingSpalding Method
(1/168) The adolescent decline of NREM delta, an indicator of brain maturation, is linked to age and sex but not to pubertal stage.
Two dramatic phenomena of human adolescence are sexual maturation and a steep decline in the delta EEG of non-rapid eye movement (NREM) sleep. It has long been speculated that these developmental changes are causally related. Here, we present the first longitudinal data on this issue. Cohorts of 9- and 12-year-old children (n = 31, 38) were studied with in-home sleep EEG recordings at 6-mo intervals over 2 years. Pubertal (Tanner) stage, height, and weight were obtained at each time point. NREM delta power density (DPD) did not change significantly over ages 9-11 years, and its level did not differ in boys and girls. DPD declined by 25% between ages 12 and 14 years. This decline was parallel in the two sexes, but levels were lower in girls, suggesting that their DPD decline began earlier. Mixed effect analyses demonstrated that DPD was strongly related to age with Tanner stage, height, weight and body mass index controlled but that none of these measures of physical and sexual development was related to DPD with age controlled. NREM delta is the sleep EEG component homeostatically related to prior waking duration and the intensity of waking brain activity. We hypothesize that the DPD decline is caused by age-programmed synaptic pruning that decreases waking brain metabolic rate. This reduced rate would decrease the "substrate" for delta homeostasis. Whether or not this interpretation proves correct, these longitudinal data demonstrate that the delta decline in adolescence reflects brain processes that are not predicted by physical growth or sexual maturation. (+info)
(2/168) The sub-clinical see-saw nystagmus embedded in infantile nystagmus.
A transient, decompensated vertical phoria in an individual with infantile nystagmus syndrome (INS) resulted in two images that oscillated vertically-a diplopic oscillopsia. Ocular motor studies during the vertical oscillopsia recreated by vertical prisms, led to the identification of a sub-clinical see-saw nystagmus (SSN), present under the prism-induced diplopic condition. Retrospective analysis of ocular motor recordings made prior to the above episode of vertical diplopia revealed the presence of that same sub-clinical SSN. The SSN had not been detected previously despite extensive observations and recordings of this subject's pendular IN over a period of forty years. Three- dimensional search-coil data from fourteen additional INS subjects (with pendular and jerk waveforms) confirmed the existence of sub-clinical SSN embedded within the clinically detectable horizontal-torsional IN in seven of the fifteen and a sub-clinical, conjugate, vertical component in the remaining eight. Unlike the clinically visible SSN found in achiasma, the cause of this sub-clinical SSN is hypothesized to be due to a failure of the forces of the oblique muscles (responsible for the torsional component of the IN) to balance out the associated forces of the vertical recti; the net result is a small, sub-clinical SSN. Thus, so-called "horizontal" IN is actually a horizontal-torsional oscillation with a secondary, sub-clinical SSN or conjugate vertical component. The suppression of oscillopsia by efference copy in INS appears to be accomplished for each eye individually, even in a binocular individual. However, failure to fuse the two images results in oscillopsia of one of them. (+info)
(3/168) Accuracy of the bedside head impulse test in detecting vestibular hypofunction.
OBJECTIVE: To determine the accuracy of the bedside head impulse test (bHIT) by direct comparison with results from the quantitative head impulse test (qHIT) in the same subjects, and to investigate whether bHIT sensitivity and specificity changes with neuro-otological training. METHODS: Video clips of horizontal bHIT to both sides were produced in patients with unilateral and bilateral peripheral vestibular deficits (n = 15) and in healthy subjects (n = 9). For qHIT, eye and head movements were recorded with scleral search coils on the right eye and the forehead. Clinicians (neurologists or otolaryngologists) with at least 6 months of neuro-otological training ("experts": n = 12) or without this training ("non-experts": n = 45) assessed video clips for ocular motor signs of vestibular deficits on either side or of normal vestibular function. RESULTS: On average, bHIT sensitivity was significantly (t test: p<0.05) lower for experts than for non-experts (63% vs 72%), while bHIT specificity was significantly higher for experts than non-experts (78% vs 64%). This outcome was a consequence of the experts' tendency to accept bHIT with corresponding borderline qHIT values as still being normal. Fitted curves revealed that at the lower normal limit of qHIT, 20% of bHIT were rated as deficient by the experts and 37% by the non-experts. CONCLUSIONS: When qHIT is used as a reference, bHIT sensitivity is adequate and therefore clinically useful in the hands of both neuro-otological experts and non-experts. We advise performing quantitative head impulse testing with search coils or high speed video methods when bHIT is not conclusive. (+info)
(4/168) The role of the ventrolateral frontal cortex in inhibitory oculomotor control.
It has been proposed that the inferior/ventrolateral frontal cortex plays a critical role in the inhibitory control of action during cognitive tasks. However, the contribution of this region to the control of eye movements has not been clearly established. Here, we describe the performance of a group of 23 frontal lobe damaged patients in an oculomotor rule switching task for which the association between a centrally presented visual cue and the direction of a saccade could change from trial to trial. A subset of 16 patients also completed the standard antisaccade task. Ventrolateral damage was found to be a significant predictor of errors in both tasks. Analysis of the rate at which patients corrected errors in the rule switching task also revealed an important dissociation between left and right hemisphere damaged patients. Whilst patients with left ventrolateral damage usually corrected response errors with secondary saccades, those with right hemisphere lesions often failed to do so. The results suggest that the inferior frontal cortex forms part of a wider frontal network mediating inhibitory control over stimulus elicited eye movements. The critical role played by the right ventrolateral region in cognitive tasks may arise due to an additional functional specialization for the monitoring and updating of task rules. (+info)
(5/168) Torsional deviations with voluntary saccades caused by a unilateral midbrain lesion.
Three dimensional eye rotations were measured using the magnetic search coil technique in a patient with a lesion of the right rostral interstitial nucleus of the medial longitudinal fasciculus (RIMLF) and in four control subjects. Up to 10 degree contralesional torsional deviations with each voluntary saccade were revealed, which also could be seen during bedside examination. There was no spontaneous nystagmus. Based on MRI criteria, the lesion involved the RIMLF but spared the interstitial nucleus of Cajal. To date, this deficit has not been described in patients. Our results support the hypothesis that the vertical-torsional saccade generator in humans is organised similarly as in monkeys: each RIMLF encodes torsional saccades in one direction, while both participate in vertical saccades. (+info)
(6/168) Evidence for cortical visual substitution of chronic bilateral vestibular failure (an fMRI study).
Bilateral vestibular failure (BVF) is a rare disorder of the labyrinth or the eighth cranial nerve which has various aetiologies. BVF patients suffer from unsteadiness of gait combined with blurred vision due to oscillopsia. Functional MRI (fMRI) in healthy subjects has shown that stimulation of the visual system induces an activation of the visual cortex and ocular motor areas bilaterally as well as simultaneous deactivations of multisensory vestibular cortex areas. Our question was whether the chronic absence of bilateral vestibular input (BVF) causes a plastic cortical reorganization of the above-described visual-vestibular interaction. We used fMRI to measure the differential effects of horizontal visual optokinetic stimulation (OKN) on activations and deactivations in 10 patients with BVF and compared their data directly to those of pairwise age- and sex-matched controls. We found that bilateral activation of the primary visual cortex (inferior and middle occipital gyri, Brodmann area BA 17, 18, 19), the motion-sensitive areas V5 in the middle and inferior temporal gyri (BA 37), and the frontal eye field (BA 8), the right paracentral and superior parietal lobule and the right fusiform and parahippocampal gyri was significantly stronger and the activation clusters were larger than that of the age-matched healthy controls. Small areas of BOLD signal decreases (deactivations), located primarily in the right posterior insula containing the parieto-insular vestibular cortex, were similar to those in the healthy controls. No other sensory brain areas showed unexpected activations or deactivations, e.g. the somatosensory or auditory cortex areas. Our finding of enhanced activations within the visual and ocular motor systems of BVF patients suggests that they might be correlated with an upregulation of visual sensitivity during tracking of visual motion patterns. Functionally, these enhanced activations are independent of optokinetic performance, since the mean slow-phase velocity of OKN in the BVF patients did not differ from that in normals. Although psychophysical and neurophysiological tests have provided various examples of how sensory loss in one modality leads to a substitutional increase of functional sensitivity in other modalities, this study presents the first evidence of visual substitution for vestibular loss by functional imaging. (+info)
(7/168) The eye movements of dyslexic children during reading and visual search: impact of the visual attention span.
The eye movements of 14 French dyslexic children having a VA span reduction and 14 normal readers were compared in two tasks of visual search and text reading. The dyslexic participants made a higher number of rightward fixations in reading only. They simultaneously processed the same low number of letters in both tasks whereas normal readers processed far more letters in reading. Importantly, the children's VA span abilities related to the number of letters simultaneously processed in reading. The atypical eye movements of some dyslexic readers in reading thus appear to reflect difficulties to increase their VA span according to the task request. (+info)
(8/168) Task and context determine where you look.
- Saccadic eye movements as indicators of cognitive function in older adults. (eyelinkinfo.com)
- a light source attached to the base, wherein the light source is directed away from the patient's eye and visible to the clinician while the patient is wearing the head mounted base. (google.co.uk)
- 3. The system of claim 2 wherein at least one of the cameras forms an occluded environment around the patient's eye when attached to the base and is configured for operation as an occluded video oculography camera. (google.com)
- 6. The system of claim 1 further including frenzel lenses selectively, removably attached to the base, each frenzel lens allowing a user to inspect the patient's eye through the lens. (google.com)
- The software was combined with a head mounted infrared video pupil tracker, recording head- and eye-movements (EyeSeeCam, University of Munich Hospital, Clinical Neurosciences). (jove.com)
- The VOG system may track and record 3-D movement of the eye, track pupil dilation, head position and goggle slippage. (google.co.uk)
- a controller coupled to each digital camera and to the head tracking sensor and receiving and storing data signals there from, and wherein the controller is used to track and record movement of the eye in an X-Y plane, and at least one of i) rotational movement of the eye and ii) pupil dilation of the eye. (google.com)
- 10. The system of claim 9 wherein the controller is used to track and record both rotational movement of the eye and pupil dilation of the eye. (google.com)
- Neurons related to scanning eye movements were mostly unrelated to the visually guided saccades. (jove.com)
- Surprisingly, neurons related to scanning eye movements differed from neurons activated during saccades suggesting functional specialization and segregation of both systems for eye movement control. (jove.com)
- Microsaccades, the largest and fastest type of fixational eye movement, shift the retinal image from several dozen to several hundred photoreceptors and have equivalent physical characteristics to saccades, only on a smaller scale ( Martinez-Conde, Otero-Millan & Macknik, 2013 ). (peerj.com)
- Saccades, smooth pursuit, reflex eye movements, and vergence eye movements aim our foveas at successive regions of interest. (peerj.com)
wherein the controller
- 4. The system of claim 2 wherein the controller is used to digitally center the eye position of the patient during operation in at least two directions. (google.co.uk)
- 7. The system of claim 1 wherein the controller is used to track and record movement of the eye in an X-Y plane, and rotational movement of the eye and wherein the controller displays an animated image of the patients' eye. (google.com)
- The Mind's Eyes: Cognitive and Applied Aspects of Eye Movement Research (pp. 175-191). (eyelinkinfo.com)
- Different oculomotor behaviors (frequency and amplitude of eye- and head-movements) are evaluated very quickly during the drive itself by dynamic overlay pictures indicating where the subjects gaze is located on the screen, and by analyzing the data. (jove.com)
- Nevertheless, in clinical routine it is difficult to identify individual levels and training effects of compensatory behavior, since it requires measurement of eye movements in a head unrestrained condition. (jove.com)
- Studies demonstrated that unrestrained head movements alter the visual exploratory behavior compared to a head-restrained laboratory condition 3 . (jove.com)
- The data of eye- and head-movement-behavior as well as driving performance are discussed with respect to different oculomotor strategies and in a broader context with respect to possible training effects throughout the testing session and implications on rehabilitation potential. (jove.com)
- Effects of aging and noise on real-time spoken word recognition: Evidence from eye movements. (eyelinkinfo.com)
- Evidence from eye movements. (eyelinkinfo.com)
- The oculomotor role of the basal ganglia has been supported by extensive evidence, although their role in scanning eye movements is poorly understood. (jove.com)
- Eye movement evidence for defocused attention in dysphoria: A perceptual span analysis. (eyelinkinfo.com)
- a lens mounted to the support frame and positioned in the optical path between the display panel and the user's eye to direct the image from the display onto the user's eye, the lens being separated from the display panel by a distance of less than 2.5 centimeters. (google.com)
- The intraocular lens, whether for implantation in the anterior or posterior chamber of the eye, embodies laterally extending non-radially oriented supporting loops which accommodate by bending compressive forces imposed thereon without flexing or bowing of the lens. (google.com)
- The posterior chamber intraocular lens implants may be fixated in the groove posterior to the iris in an extracapsular eye or in the anterior chamber after penetration of the supporting loop segments through peripheral openings in the iris in an intracapsular eye, with either location in fixation, the lens anatomically replaces the surgically removed lens of the eye. (google.com)
- Age-related decline of peripheral visual processing: the role of eye movements. (eyelinkinfo.com)
- 2. The system of claim 1 wherein the cameras selectively provide for top mounted cameras for each eye and side mounted cameras for each eye. (google.com)
- An animated eye display provides data in a more meaningful fashion. (google.co.uk)
designed to make
- JCMR said it is also developing a service based on research of fundamental psychological and perception theory designed to make the eye-tracking device even more effective. (photonics.com)
- Does visual attention span relate to eye movements during reading and copying? (eyelinkinfo.com)
- SCT consists of learning to make larger eye movements into the blind field enlarging the visual field of search, which has been proven to be the most useful strategy 1 , not only in natural search tasks but also in mastering daily life activities 2 . (jove.com)
- Scene context influences without scene gist: Eye movements guided by spatial associations in visual search. (eyelinkinfo.com)
- The influence of artificial scotomas on eye-movements during visual search. (eyelinkinfo.com)
- The Japan Consumer Marketing Research Institute (JCMR), which provides marketing services based on lifestyle research, announced this week it will launch its JCMR Eye-Tracking Solution service for evaluating company marketing effectiveness through the use of eye-tracking technology. (photonics.com)
- 2. The head mounted display system of claim 1 wherein a first display panel is positioned to direct an image onto the user's left eye and a second display panel is positioned to direct light onto the user's right eye. (google.com)
- The Eye-Trackers camera used in the JCMR Eye-Tracking Solution does not require special headgear to be worn by the consumer being tested and can track the human eye to a high degree of accuracy (typically to within 1 cm of movement on a normal computer screen), which gives insight into eye movement and where attention is being focused, the company said. (photonics.com)
- The relationship between neuronal firing rate and eye movements was studied by crosscorrelation analysis. (jove.com)
- Nineteen Parkinso?s disease patients, which underwent implantation of deep brain stimulation electrodes, were investigated with simultaneous intraoperative microelectrode recordings and single channel electrooculography in a scanning eye movement task by viewing a series of colored pictures selected from the International Affective Picture System. (jove.com)
- Monitoring of breathing during wakefulness, non-rapid eye movement sleep, and rapid eye movement sleep included measurements of nasal/oral airflow, respiratory effort, and oxygen saturation. (ahajournals.org)
- Eye movements and the perceptual span in silent and oral reading. (eyelinkinfo.com)
- We conclude that a relatively large number of basal ganglia neurons are involved in eye motion control. (jove.com)
- Our eyes are in continuous motion. (peerj.com)
- Detecting age-related neurodegenerative eye disease using eye movement scanpaths. (eyelinkinfo.com)
- 2. Apparatus as recited in claim 1, said additional flowpath comprising a flexible duct, said duct being formed from material that is more rigid than said balloon-like member, whereby said duct can serve as means for permitting guidance of the movement of said balloon-like member. (google.com)
- The effects of practice and external support on older adults' control of reflexive eye movements. (eyelinkinfo.com)