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https://www.readbyqxmd.com/read/28939027/simulating-interaction-using-gaze-contingent-eye-tracking-to-measure-the-reward-value-of-social-signals-in-toddlers-with-and-without-autism
#1
Angelina Vernetti, Atsushi Senju, Tony Charman, Mark H Johnson, Teodora Gliga
Several accounts have been proposed to explain difficulties with social interaction in autism spectrum disorder (ASD), amongst which atypical social orienting, decreased social motivation or difficulties with understanding the regularities driving social interaction. This study uses gaze-contingent eye-tracking to tease apart these accounts by measuring reward related behaviours in response to different social videos. Toddlers at high or low familial risk for ASD took part in this study at age 2 and were categorised at age 3 as low risk controls (LR), high-risk with no ASD diagnosis (HR-no ASD), or with a diagnosis of ASD (HR-ASD)...
August 12, 2017: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/28938324/bilateral-subperiosteal-hematoma-and-orbital-compression-syndrome-in-sickle-cell-disease
#2
Cem Sundu, Erdem Dinç, Ayça Sari, Selma Ünal, Özer Dursun
A 14-year-old boy with sickle cell disease presented with preseptal cellulitis findings as proptosis, eyelid edema, and hyperemia. His best corrected visual acuity in the right eye was 20/20 and 16/20 in the left eye. He had limited ductions in vertical and lateral gazes in both eyes. Bilateral venous tortuosity was observed in posterior segment examination. Orbital bone infarction and subperiosteal hematoma were seen in magnetic resonance imaging. He was diagnosed as having orbital compression syndrome secondary to vaso-occlusive crisis of sickle cell disease and was treated with intravenous ampicilin-sulbactam and methylprednisolone...
September 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28934067/transient-effects-of-gaze-stability-exercises-on-postural-stability-in-patients-with-posterior-circulation-stroke
#3
Tsubasa Mitsutake, Maiko Sakamoto, Kozo Ueta, Etsuo Horikawa
The authors sought to investigate if short-term gaze stability exercises have an effect on postural stability of dynamic standing during neck movement in patients with posterior circulation stroke (PCS). Patients in both PCS and non-PCS groups were assigned to either an intervention or control group. The intervention group performed the gaze stability exercises for 10 min while the control group was merely resting. The center of pressure velocity was calculated to evaluate the postural stability. After intervention, PCS and non-PCS showed a significant reduction in center of pressure velocity during dynamic standing with eyes closed condition, and the PCS group showed a significant improvement in eye-opened condition...
September 21, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28932776/reactive-and-anticipatory-looking-in-6-month-old-infants-during-a-visual-expectation-paradigm
#4
Jeffry Quan, Jean-François Bureau, Adam B Abdul Malik, Johnny Wong, Anne Rifkin-Graboi
This article presents data from 278 six-month-old infants who completed a visual expectation paradigm in which audiovisual stimuli were first presented randomly (random phase), and then in a spatial pattern (pattern phase). Infants' eye gaze behaviour was tracked with a 60 Hz Tobii eye-tracker in order to measure two types of looking behaviour: reactive looking (i.e., latency to shift eye gaze in reaction to the appearance of stimuli) and anticipatory looking (i.e., percentage of time spent looking at the location where the next stimulus is about to appear during the inter-stimulus interval)...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28931974/gaze-stabilization-exercises-derive-sensory-reweighting-of-vestibular-for-postural-control
#5
Yusuke Ueta, Akiyoshi Matsugi, Kosuke Oku, Kojiro Okuno, Yoshiki Tamaru, Shohei Nomura, Hiroaki Tanaka, Shinya Douchi, Nobuhiko Mori
[Purpose] The aim of this study was to investigate whether gaze stabilization exercise derives sensory reweighting of vestibular for upright postural control. [Subjects and Methods] Twenty-three healthy volunteers participated in this study. The center of pressure of the total trajectory length was measured before (pre), immediately after (post), and 10 min after (post10) gaze stabilization exercise, in the static standing position, with the eyes open or closed, on the floor or on foam rubber. The sensory contribution values of the visual, somatosensory, and vestibular systems were calculated using center of pressure of the total trajectory length value in these measuring conditions...
September 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28927321/do-current-and-former-cigarette-smokers-have-an-attentional-bias-for-e-cigarette-cues
#6
Kirsten Lochbuehler, E Paul Wileyto, Kathy Z Tang, Melissa Mercincavage, Joseph N Cappella, Andrew A Strasser
The similarity of e-cigarettes to tobacco cigarettes with regard to shape and usage raises the question of whether e-cigarette cues have the same incentive motivational properties as tobacco cigarette cues. The objective of the present study was to examine whether e-cigarette cues capture and hold smokers' and former smokers' attention and whether the attentional focus is associated with subsequent craving for tobacco cigarettes. It was also examined whether device type (cigalike or mod) moderated this relationship...
September 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28925815/examining-the-spatiotemporal-disruption-to-gaze-when-using-a-myoelectric-prosthetic-hand
#7
J V V Parr, S J Vine, N R Harrison, G Wood
The aim of this study was to provide a detailed account of the spatial and temporal disruptions to eye-hand coordination when using a prosthetic hand during a sequential fine motor skill. Twenty-one able-bodied participants performed 15 trials of the picking up coins task derived from the Southampton Hand Assessment Procedure with their anatomic hand and with a prosthesis simulator while wearing eye-tracking equipment. Gaze behavior results revealed that when using the prosthesis, performance detriments were accompanied by significantly greater hand-focused gaze and a significantly longer time to disengage gaze from manipulations to plan upcoming movements...
September 19, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28922090/microsaccades-and-interest-areas-during-free-viewing-sport-task
#8
Alessandro Piras, Milena Raffi, Monica Perazzolo, Ivan Malagoli Lanzoni, Salvatore Squatrito
Microsaccades are important fixation eye movements for visual scene perception. Compared to novices, athletes make fewer fixations of longer duration toward limited interest areas crucial for action prediction. Thus, our aim was to study the microsaccade features during those fixations. Gaze behaviour of expert and novice table tennis players was recorder during a task in which subjects were instructed to predict the direction of the ball after the opponent's throw. Three interest areas from the opponent's body and one from the ball trajectory were identified...
September 18, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28913320/pediatric-orbital-medial-wall-trapdoor-fracture-with-normal-computed-tomography-findings
#9
Hyun Rok Lee, Gyu Yong Jung, Dong Lark Lee, Hea Kyeong Shin
With advances in diagnostic technology, radiologic diagnostic methods have been used more frequently, and physical examination may be neglected. The authors report a case of pediatric medial orbital trapdoor fracture in which the surgery was delayed because computed tomography (CT) findings did not indicate bone displacement, incarceration of rectus muscle, or soft tissue herniation. A healthy 6-year-old boy was admitted to the emergency room for right eyebrow laceration. We could not check eyeball movement or diplopia, because the patient was irritable...
June 2017: Arch Craniofac Surg
https://www.readbyqxmd.com/read/28912800/gaze-estimation-method-using-analysis-of-electrooculogram-signals-and-kinect-sensor
#10
Keiko Sakurai, Mingmin Yan, Koichi Tanno, Hiroki Tamura
A gaze estimation system is one of the communication methods for severely disabled people who cannot perform gestures and speech. We previously developed an eye tracking method using a compact and light electrooculogram (EOG) signal, but its accuracy is not very high. In the present study, we conducted experiments to investigate the EOG component strongly correlated with the change of eye movements. The experiments in this study are of two types: experiments to see objects only by eye movements and experiments to see objects by face and eye movements...
2017: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28903712/power-moves-beyond-complementarity-a-staring-look-elicits-avoidance-in-low-power-perceivers-and-approach-in-high-power-perceivers
#11
Mario Weick, Cade McCall, Jim Blascovich
Sustained, direct eye-gaze-staring-is a powerful cue that elicits strong responses in many primate and nonprimate species. The present research examined whether fleeting experiences of high and low power alter individuals' spontaneous responses to the staring gaze of an onlooker. We report two experimental studies showing that sustained, direct gaze elicits spontaneous avoidance tendencies in low power perceivers and spontaneous approach tendencies in high power perceivers. These effects emerged during interactions with different targets and when power was manipulated between-individuals (Study 1) and within-individuals (Study 2), thus attesting to a high degree of flexibility in perceivers' reactions to gaze cues...
August 2017: Personality & Social Psychology Bulletin
https://www.readbyqxmd.com/read/28901575/fuming-with-rage-do-members-of-low-status-groups-signal-anger-more%C3%A2-than-members-of-high-status-groups
#12
Chuma Kevin Owuamalam, Mark Rubin
Owuamalam, Weerabangsa, Karunagharan and Rubin found that Malaysians associate people in low status groups with anger more than their higher status counterparts: the hunchback heuristic. But is this belief accurate? Here, we propose the alternative possibility that members of low-status groups might deliberately suppress anger to counter this stigma, while members of high-status groups might disinhibit their anger to assert their superiority. To test these propositions, we manipulated undergraduate students' relative group status by leading them to believe that provocative comments about their undergraduate social identity came from a professor (low-status condition) or a junior foundation year student (high-status condition)...
October 2017: Scandinavian Journal of Psychology
https://www.readbyqxmd.com/read/28900673/eye-hand-coordination-during-visuomotor-adaptation-effects-of-hemispace-and-joint-coordination
#13
Miya K Rand, Sebastian Rentsch
We previously examined adaptive changes of eye-hand coordination during learning of a visuomotor rotation. Gazes during reaching movements were initially directed to a feedback cursor in early practice, but were gradually shifted toward the target with more practice, indicating an emerging gaze anchoring behavior. This adaptive pattern reflected a functional change of gaze control from exploring the cursor-hand relation to guiding the hand to the task goal. The present study further examined the effects of hemispace and joint coordination associated with target directions on this behavior...
September 12, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28900576/comparison-of-saccadic-vector-optokinetic-perimetry-and-standard-automated-perimetry-in-glaucoma-part-i-threshold-values-and-repeatability
#14
Ian C Murray, Antonios Perperidis, Lorraine A Cameron, Alice D McTrusty, Harry M Brash, Andrew J Tatham, Pankaj K Agarwal, Brian W Fleck, Robert A Minns
PURPOSE: We evaluated threshold saccadic vector optokinetic perimetry (SVOP) and compared results to standard automated perimetry (SAP). METHODS: A cross-sectional study was done including 162 subjects (103 with glaucoma and 59 healthy subjects) recruited at a university hospital. All subjects underwent SAP and threshold SVOP. SVOP uses an eye tracker to monitor eye movement responses to stimuli and determines if stimuli have been perceived based on the vector of the gaze response...
September 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/28891467/removal-of-inhibition-uncovers-latent-movement-potential-during-preparation
#15
Uday K Jagadisan, Neeraj J Gandhi
The motor system prepares for movements well in advance of their execution. In the gaze control system, the dynamics of preparatory neural activity have been well described by stochastic accumulation-to-threshold models. However, it is unclear whether this activity has features indicative of a hidden movement command. We explicitly tested whether preparatory neural activity in premotor neurons of the primate superior colliculus has "motor potential". We removed downstream inhibition on the saccadic system using the trigeminal blink reflex, triggering saccades at earlier-than-normal latencies...
September 11, 2017: ELife
https://www.readbyqxmd.com/read/28890778/yawning-detection-sensitivity-and-yawning-contagion
#16
Meingold H M Chan, Chia-Huei Tseng
Contagious yawning-the urge to yawn when thinking about, listening to, or viewing yawning-is a well-documented phenomenon in humans and animals. The reduced yawn contagion observed in the autistic population suggested that it might be empathy related; however, it is unknown whether such a connection applies to nonclinical populations. We examined influences from both empathy (i.e., autistic traits) and nonempathy factors (i.e., individuals' perceptual detection sensitivity to yawning, happy, and angry faces) on 41 nonclinical adults...
July 2017: I-Perception
https://www.readbyqxmd.com/read/28890696/gaze-bias-in-preference-judgments-by-younger-and-older-adults
#17
Toshiki Saito, Rui Nouchi, Hikari Kinjo, Ryuta Kawashima
Individuals' gaze behavior reflects the choice they will ultimately make. For example, people confronting a choice among multiple stimuli tend to look longer at stimuli that are subsequently chosen than at other stimuli. This tendency, called the gaze bias effect, is a key aspect of visual decision-making. Nevertheless, no study has examined the generality of the gaze bias effect in older adults. Here, we used a two-alternative forced-choice task (2AFC) to compare the gaze behavior reflective of different stages of decision processes demonstrated by younger and older adults...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28889009/gaze-position-interferes-in-body-sway-in-young-adults
#18
Carolina Menezes Fiorelli, Paula Fávaro Polastri, Sérgio Tosi Rodrigues, André Macari Baptista, Tiago Penedo, Vinicius Alota Ignácio Pereira, Lucas Simieli, Fabio Augusto Barbieri
Postural control is influenced by eye movements. Gaze fixation, which comprises a component of ocular vergence, is important in the acquisition of highly specific task information, but its relation to postural control is little investigated. The aim of the study was to investigate the effects of gaze fixation position (central and lateral fixations) on postural sway in young adults. Forty young adults with ages ranging from 20 to 35 years were invited to participate in the study. Postural sway was measured in quiet stance in bipedal support in three 60-s trials under the following conditions: gaze fixation on a target positioned in front of participant, gaze fixation on a target positioned on right side of participant, and gaze fixation on a target positioned on left side of participant...
September 6, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28884336/the-effects-of-constraining-vision-and-eye-movements-on-whole-body-coordination-during-standing-turns
#19
Rebecca K Robins, Mark A Hollands
Turning the body towards a new direction is normally achieved via a top-down synergy whereby gaze (eye direction in space) leads the upper body segments, which in turn lead the feet. These anticipatory eye movements are observable even in darkness and constraining the initial eye movements modifies the stereotyped top-down reorientation sequence. Our aim was to elucidate the relative contributions of vision and eye movements to whole-body coordination during large standing turns by observing the effects of separately removing visual information or suppressing eye movements throughout the turn...
September 7, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28883471/potential-systematic-interception-errors-are-avoided-when-tracking-the-target-with-one-s-eyes
#20
Cristina de la Malla, Jeroen B J Smeets, Eli Brenner
Directing our gaze towards a moving target has two known advantages for judging its trajectory: the spatial resolution with which the target is seen is maximized, and signals related to the eyes' movements are combined with retinal cues to better judge the target's motion. We here explore whether tracking a target with one's eyes also prevents factors that are known to give rise to systematic errors in judging retinal speeds from resulting in systematic errors in interception. Subjects intercepted white or patterned disks that moved from left to right across a large screen at various constant velocities while either visually tracking the target or fixating the position at which they were required to intercept the target...
September 7, 2017: Scientific Reports
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