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https://www.readbyqxmd.com/read/28344569/eye-contact-judgment-is-influenced-by-perceivers-social-anxiety-but-not-by-their-affective-state
#1
Tingji Chen, Lauri Nummenmaa, Jari K Hietanen
Fast and accurate judgment of whether another person is making eye contact or not is crucial for our social interaction. As affective states have been shown to influence social perceptions and judgments, we investigated the influence of observers' own affective states and trait anxiety on their eye contact judgments. In two experiments, participants were required to judge whether animated faces (Experiment 1) and real faces (Experiment 2) with varying gaze angles were looking at them or not. Participants performed the task in pleasant, neutral, and unpleasant odor conditions...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28342160/dogs-demonstrate-perspective-taking-based-on-geometrical-gaze-following-in-a-guesser-knower-task
#2
Amélie Catala, Britta Mang, Lisa Wallis, Ludwig Huber
Currently, there is still no consensus about whether animals can ascribe mental states (Theory of Mind) to themselves and others. Showing animals can respond to cues that indicate whether another has visual access to a target or not, and that they are able to use this information as a basis for whom to rely on as an informant, is an important step forward in this direction. Domestic dogs (Canis familiaris) with human informants are an ideal model, because they show high sensitivity towards human eye contact, they have proven able to assess the attentional state of humans in food-stealing or food-begging contexts, and they follow human gaze behind a barrier when searching for food...
March 24, 2017: Animal Cognition
https://www.readbyqxmd.com/read/28341645/paroxysmal-eye-head-movements-in-glut1-deficiency-syndrome
#3
Toni S Pearson, Roser Pons, Kristin Engelstad, Steven A Kane, Michael E Goldberg, Darryl C De Vivo
OBJECTIVE: To describe a characteristic paroxysmal eye-head movement disorder that occurs in infants with Glut1 deficiency syndrome (Glut1 DS). METHODS: We retrospectively reviewed the medical charts of 101 patients with Glut1 DS to obtain clinical data about episodic abnormal eye movements and analyzed video recordings of 18 eye movement episodes from 10 patients. RESULTS: A documented history of paroxysmal abnormal eye movements was found in 32/101 patients (32%), and a detailed description was available in 18 patients, presented here...
March 24, 2017: Neurology
https://www.readbyqxmd.com/read/28336357/assessment-of-vestibulo-ocular-function-without-measuring-eye-movements
#4
Kara H Beaton, Michael Schubert, Mark Shelhamer
BACKGROUND: The vestibulo-ocular reflex (VOR) maintains stable gaze during head motion. Deficiencies lead to apparent world motion due to incomplete stabilization of eyes in space. VOR measurement requires specialized apparatus, trained operators, and significant setup time. NEW METHOD: We present a system (VON: vestibulo-ocular nulling) for rapid vestibulo-ocular assessment without measuring 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...
March 20, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28336224/surface-coverage-with-single-vs-multiple-gaze-surface-topography-to-fit-scleral-lenses
#5
Gregory DeNaeyer, Donald R Sanders, Timothy S Farajian
OBJECTIVES: To determine surface coverage of measurements using the sMap3D(®) corneo-scleral topographer in patients presenting for scleral lens fitting. METHODS: Twenty-five eyes of 23 scleral lens patients were examined. Up-gaze, straight-gaze, and down-gaze positions of each eye were "stitched" into a single map. The percentage surface coverage between 10mm and 20mm diameter circles from corneal center was compared between the straight-gaze and stitched images...
March 20, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28328997/influence-of-intraocular-lens-subsurface-nanoglistenings-on-functional-visual-acuity
#6
Takahiro Hiraoka, Kazunori Miyata, Takeshi Hayashidera, Masaharu Iida, Keita Takada, Keiichiro Minami, Tetsuro Oshika
To investigate the influence of intraocular lens subsurface nanoglistenings (SSNGs) on functional visual acuity (FVA), thirty-nine eyes of 29 patients were examined in this study. The SSNG group comprised 19 eyes of 14 patients (75.7± 5.4 years, mean ± standard deviation), and the control group comprised 20 eyes of 15 patients (73.6 ± 6.5 years). The SSNGs were diagnosed on the basis of the typical whitish IOL appearance upon slit-lamp examination and results of densitometry regarding surface light scattering using Scheimpflug images...
2017: PloS One
https://www.readbyqxmd.com/read/28327346/genuine-eye-contact-elicits-self-referential-processing
#7
Jonne O Hietanen, Jari K Hietanen
The effect of eye contact on self-awareness was investigated with implicit measures based on the use of first-person singular pronouns in sentences. The measures were proposed to tap into self-referential processing, that is, information processing associated with self-awareness. In addition, participants filled in a questionnaire measuring explicit self-awareness. In Experiment 1, the stimulus was a video clip showing another person and, in Experiment 2, the stimulus was a live person. In both experiments, participants were divided into two groups and presented with the stimulus person either making eye contact or gazing downward, depending on the group assignment...
March 16, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28326593/allocation-of-speech-in-conversation
#8
Carsta Simon, William M Baum
In a replication and extension of Conger and Killeen's (1974) widely cited demonstration of matching in conversations, we evaluated nine participants' allocation of speech and gaze to two conversational partners. German speakers participated in two 90-min sessions in which confederates uttered approval on independent variable-interval schedules. In one of the sessions, confederates uttered approval contingent upon and contiguous with eye contact whereas in the other session approval was uttered independent of the participant's gaze...
March 2017: Journal of the Experimental Analysis of Behavior
https://www.readbyqxmd.com/read/28324264/reverse-locked-in-syndrome
#9
Pooja Raibagkar, Ram V Chavali, Tamara B Kaplan, Jennifer A Kim, Meaghan V Nitka, Sherry H-Y Chou, Brian L Edlow
BACKGROUND: Basilar artery occlusion can cause locked-in syndrome, which is characterized by quadriplegia, anarthria, and limited communication via eye movements. Here, we describe an uncommon stroke syndrome associated with endovascular recanalization of the top of the basilar artery: "reverse locked-in syndrome." METHODS: We report the case of a patient with atypical neurological deficits caused by acute ischemic stroke of the midbrain tegmentum. We perform neuroanatomic localization of the patient's infarcts by mapping the magnetic resonance imaging (MRI) data onto a brainstem atlas...
March 21, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28323114/physician-activity-during-outpatient-visits-and-subjective-workload
#10
Alan Calvitti, Harry Hochheiser, Shazia Ashfaq, Kristin Bell, Yunan Chen, Robert El Kareh, Mark T Gabuzda, Lin Liu, Sara Mortensen, Braj Pandey, Steven Rick, Richard L Street, Nadir Weibel, Charlene Weir, Zia Agha
We describe methods for capturing and analyzing EHR use and clinical workflow of physicians during outpatient encounters and relating activity to physicians' self-reported workload. We collected temporally-resolved activity data including audio, video, EHR activity, and eye-gaze along with post-visit assessments of workload. These data are then analyzed through a combination of manual content analysis and computational techniques to temporally align streams, providing a range of process measures of EHR usage, clinical workflow, and physician-patient communication...
March 17, 2017: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/28322748/oxytocin-promotes-attention-to-social-cues-regardless-of-group-membership
#11
Michaela Pfundmair, Clarissa Zwarg, Markus Paulus, Anne Rimpel
The social saliency account proposes that oxytocin (OT) plays a major role in modulating attentional shifts toward social cues at early stages of processing. We investigated how OT promotes early attention toward nonsocial and social stimuli and explored differences between in-group- and out-group-related social cues. After participants intranasally self-administered OT or placebo, they were eye-tracked while observing a nonsocial and social cues that were assigned to the in- or out-group by a minimal group paradigm...
March 23, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28320694/rectus-muscle-excyclorotation-and-v-pattern-strabismus-a-quantitative-appraisal-of-clinical-relevance-in-syndromic-craniosynostosis
#12
Linda R Dagi, Sarah MacKinnon, David Zurakowski, Sanjay P Prabhu
PURPOSE: V-pattern strabismus observed with syndromic craniosynostosis has been attributed to disparate causes. We compared severity of V pattern with degree of excyclorotation of rectus muscles to appraise significance of this proposed aetiology. METHODS: 43 patients with Apert, Crouzon or Pfeiffer syndrome referred to Boston Children's Hospital Department of Ophthalmology were identified. 28 met inclusion criteria for retrospective cohort study, specifically: (1) sensorimotor measurements in minimum of seven cardinal gazes, (2) quantified fundus torsion and (3) orbital CT imaging sufficient to measure rectus muscle cyclorotation in coronal and quasicoronal planes, posteriorly (near orbital apex) and anteriorly (near pulleys)...
March 20, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28320194/acquired-pendular-nystagmus
#13
REVIEW
Sarah Kang, Aasef G Shaikh
Acquired pendular nystagmus is comprised of quasi-sinusoidal oscillations of the eyes significantly affecting gaze holding and clarity of vision. The most common causes of acquired pendular nystagmus include demyelinating disorders such as multiple sclerosis and the syndrome of ocular palatal tremor. However, several other deficits, such as pharmacological intoxication, metabolic and genetic disorders, and granulomatous disorders can lead to syndromes mimicking acquired pendular nystagmus. Study of the kinematic features of acquired pendular nystagmus has suggested a putative pathophysiology of an otherwise mysterious neurological disorder...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28315309/effects-of-task-demands-on-the-early-neural-processing-of-fearful-and-happy-facial-expressions
#14
Roxane J Itier, Karly N Neath-Tavares
Task demands shape how we process environmental stimuli but their impact on the early neural processing of facial expressions remains unclear. In a within-subject design, ERPs were recorded to the same fearful, happy and neutral facial expressions presented during a gender discrimination, an explicit emotion discrimination and an oddball detection tasks, the most studied tasks in the field. Using an eye tracker, fixation on the face nose was enforced using a gaze-contingent presentation. Task demands modulated amplitudes from 200-350ms at occipito-temporal sites spanning the EPN component...
March 14, 2017: Brain Research
https://www.readbyqxmd.com/read/28296958/interaction-between-the-oculomotor-and-postural-systems-during-a-dual-task-compensatory-reductions-in-head-sway-following-visually-induced-postural-perturbations-promote-the-production-of-accurate-double-step-saccades-in-standing-human-adults
#15
Mathieu Boulanger, Guillaume Giraudet, Jocelyn Faubert
Humans routinely scan their environment for useful information using saccadic eye movements and/or coordinated movements of the eyes and other body segments such the head and the torso. Most previous eye movement studies were conducted with seated subject and showed that single saccades and sequences of saccades (e.g. double-step saccades) made to briefly flashed stimuli were equally accurate and precise. As one can easily appreciate, most gaze shifts performed daily by a given person are not produced from a seated position, but rather from a standing position either as subjects perform an action from an upright stance or as they walk from one place to another...
2017: PloS One
https://www.readbyqxmd.com/read/28295917/gaze-based-rehearsal-in-children-under-7-a-developmental-investigation-of-eye-movements-during-a-serial-spatial-memory-task
#16
Candice C Morey, Silvana Mareva, Jaroslaw R Lelonkiewicz, Nicolas Chevalier
The emergence of strategic verbal rehearsal at around 7 years of age is widely considered a major milestone in descriptions of the development of short-term memory across childhood. Likewise, rehearsal is believed by many to be a crucial factor in explaining why memory improves with age. This apparent qualitative shift in mnemonic processes has also been characterized as a shift from passive visual to more active verbal mnemonic strategy use, but no investigation of the development of overt spatial rehearsal has informed this explanation...
March 12, 2017: Developmental Science
https://www.readbyqxmd.com/read/28295482/what-am-i-looking-at-interpreting-dynamic-and-static-gaze-displays
#17
Margot van Wermeskerken, Damien Litchfield, Tamara van Gog
Displays of eye movements may convey information about cognitive processes but require interpretation. We investigated whether participants were able to interpret displays of their own or others' eye movements. In Experiments 1 and 2, participants observed an image under three different viewing instructions. Then they were shown static or dynamic gaze displays and had to judge whether it was their own or someone else's eye movements and what instruction was reflected. Participants were capable of recognizing the instruction reflected in their own and someone else's gaze display...
March 13, 2017: Cognitive Science
https://www.readbyqxmd.com/read/28293433/eye-tracking-as-a-tool-to-evaluate-functional-ability-in-everyday-tasks-in-glaucoma
#18
REVIEW
Enkelejda Kasneci, Alex A Black, Joanne M Wood
To date, few studies have investigated the eye movement patterns of individuals with glaucoma while they undertake everyday tasks in real-world settings. While some of these studies have reported possible compensatory gaze patterns in those with glaucoma who demonstrated good task performance despite their visual field loss, little is known about the complex interaction between field loss and visual scanning strategies and the impact on task performance and, consequently, on quality of life. We review existing approaches that have quantified the effect of glaucomatous visual field defects on the ability to undertake everyday activities through the use of eye movement analysis...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28292832/functional-organization-of-vestibulo-ocular-responses-in-abducens-motoneurons
#19
Haike Dietrich, Stefan Glasauer, Hans Straka
Vestibulo-ocular reflexes (VOR) are the dominating contributors to gaze stabilization in all vertebrates. During horizontal head movements, abducens motoneurons form the final element of the reflex arc that integrates visuo-vestibular inputs into temporally precise motor commands for the lateral rectus eye muscle. Here, we studied a possible differentiation of abducens motoneurons into subtypes by evaluating their morphology, discharge properties and synaptic pharmacology in semi-intact in vitro preparations of larval Xenopus laevis Extracellular nerve recordings during sinusoidal head motion revealed a continuum of resting rates and activation thresholds during vestibular stimulation...
March 14, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28292694/asb-clinical-biomechanics-award-winner-2016-assessment-of-gaze-stability-within-24-48hours-post-concussion
#20
Nicholas G Murray, Nathan R D'Amico, Douglas Powell, Megan E Mormile, Katelyn E Grimes, Barry A Munkasy, Russell K Gore, Rebecca J Reed-Jones
BACKGROUND: Approximately 90% of athletes with concussion experience a certain degree of visual system dysfunction immediately post-concussion. Of these abnormalities, gaze stability deficits are denoted as among the most common. Little research quantitatively explores these variables post-concussion. As such, the purpose of this study was to investigate and compare gaze stability between a control group of healthy non-injured athletes and a group of athletes with concussions 24-48hours post-injury...
March 6, 2017: Clinical Biomechanics
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