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Saccade and memory

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https://www.readbyqxmd.com/read/29327042/transsaccadic-memory-of-multiple-spatially-variant-and-invariant-object-features
#1
Jerrold Jeyachandra, Yoongoo Nam, YoungWook Kim, Gunnar Blohm, Aarlenne Z Khan
Transsaccadic memory is a process by which remembered object information is updated across a saccade. To date, studies on transsaccadic memory have used simple stimuli-that is, a single dot or feature of an object. It remains unknown how transsaccadic memory occurs for more realistic, complex objects with multiple features. An object's location is a central feature for transsaccadic updating, as it is spatially variant, but other features such as size are spatially invariant. How these spatially variant and invariant features of an object are remembered and updated across saccades is not well understood...
January 1, 2018: Journal of Vision
https://www.readbyqxmd.com/read/29321562/perception-during-double-step-saccades
#2
E Zimmermann, M C Morrone, P Binda
How the visual system achieves perceptual stability across saccadic eye movements is a long-standing question in neuroscience. It has been proposed that an efference copy informs vision about upcoming saccades, and this might lead to shifting spatial coordinates and suppressing image motion. Here we ask whether these two aspects of visual stability are interdependent or may be dissociated under special conditions. We study a memory-guided double-step saccade task, where two saccades are executed in quick succession...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29295669/effects-of-handedness-consistency-and-saccade-execution-on-eyewitness-memory-in-cued-and-free-recall-procedures
#3
Keith B Lyle
Identifying characteristics that distinguish between people with relatively good versus poor episodic memory is an important goal of eyewitness-memory research, as is identifying activities that can improve people's ability to retrieve episodic memories. Consistency of hand preference is a trait associated with the quality of people's episodic memory and repetitive saccade execution is an activity known to improve people's ability to retrieve episodic memories. These factors were examined in relation to cued and free recall of a staged criminal event...
January 2, 2018: Memory
https://www.readbyqxmd.com/read/29275124/effects-of-saccade-induced-retrieval-enhancement-on-conceptual-and-perceptual-tests-of-explicit-implicit-memory
#4
Andrew Parker, Daniel Powell, Neil Dagnall
The effects of saccadic horizontal (bilateral) eye movements upon tests of both conceptual and perceptual forms of explicit and implicit memory were investigated. Participants studied a list of words and were then assigned to one of four test conditions: conceptual explicit, conceptual implicit, perceptual explicit, or perceptual implicit. Conceptual tests comprised category labels with either explicit instructions to recall corresponding examples from the study phase (category-cued recall), or implicit instructions to generate any corresponding examples that spontaneously came to mind (category-exemplar generation)...
December 21, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/29246747/tms-over-posterior-parietal-cortex-disrupts-trans-saccadic-visual-stability
#5
Thérèse Collins, Pierre O Jacquet
BACKGROUND: Saccadic eye movements change the retinal location of visual objects, but we do not experience the visual world as constantly moving, we perceive it as seamless and stable. This visual stability may be achieved by an internal or efference copy of each saccade that, combined with the retinal information, allows the visual system to cancel out or ignore the self-caused retinal motion. OBJECTIVE: The current study investigated the underlying brain mechanisms responsible for visual stability in humans with online transcranial magnetic stimulation (TMS)...
November 29, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/29240758/increased-gamma-band-activity-for-lateral-interactions-in-humans
#6
Alon Shapira, Anna Sterkin, Moshe Fried, Oren Yehezkel, Zeev Zalevsky, Uri Polat
Collinear facilitation of contrast sensitivity supported by lateral interactions within primary visual cortex is implicated in contour and object perception, with neural correlates in several frequency bands. Although higher component of the ERP power spectrum, the gamma-band, is postulated to reflect object representation, attention and memory, its neuronal source has been questioned, suggesting it is an artifact reflecting saccadic eye movements. Here we explored the gamma-band activity during collinear facilitation with no saccade-related confounds...
2017: PloS One
https://www.readbyqxmd.com/read/29231021/-eye-movement-characteristics-of-cooperation-degree-during-image-completion-test-in-psychiatric-impairment-assessment
#7
J J Wang, C Liu, L Liu, S Y Zhang, H Z Li, W X Cai
OBJECTIVES: To explore the difference of eye movement characteristics between uncooperative and cooperative subjects with mental disorder after cerebral trauma. METHODS: Thirty-nine subjects which needed psychiatric impairment assessment were selected. According to the binomial forced-choice digit memory test (BFDMT), all subjects were divided into cooperative and uncooperative groups. The subjects were asked to take the image completion test from Wechsler adult intelligence scale...
April 2017: Fa Yi Xue za Zhi
https://www.readbyqxmd.com/read/29230169/eye-gaze-and-aging-selective-and-combined-effects-of-working-memory-and-inhibitory-control
#8
Trevor J Crawford, Eleanor S Smith, Donna M Berry
Eye-tracking is increasingly studied as a cognitive and biological marker for the early signs of neuropsychological and psychiatric disorders. However, in order to make further progress, a more comprehensive understanding of the age-related effects on eye-tracking is essential. The antisaccade task requires participants to make saccadic eye movements away from a prepotent stimulus. Speculation on the cause of the observed age-related differences in the antisaccade task largely centers around two sources of cognitive dysfunction: inhibitory control (IC) and working memory (WM)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29223864/involuntary-top-down-control-by-search-irrelevant-features-visual-working-memory-biases-attention-in-an-object-based-manner
#9
Rebecca M Foerster, Werner X Schneider
Many everyday tasks involve successive visual-search episodes with changing targets. Converging evidence suggests that these targets are retained in visual working memory (VWM) and bias attention from there. It is unknown whether all or only search-relevant features of a VWM template bias attention during search. Bias signals might be configured exclusively to task-relevant features so that only search-relevant features bias attention. Alternatively, VWM might maintain objects in the form of bound features...
December 7, 2017: Cognition
https://www.readbyqxmd.com/read/29163352/parahippocampal-involvement-in-mesial-temporal-lobe-epilepsy-with-hippocampal-sclerosis-a-proof-of-concept-from-memory-guided-saccades
#10
Silvia Colnaghi, Giorgio Beltrami, Guy Poloni, Anna Pichiecchio, Stefano Bastianello, Carlo Andrea Galimberti, Maurizio Versino
Objective: Mesial temporal lobe epilepsy with hippocampal sclerosis (MTLE-HS) may involve extrahippocampal areas of structural damage and dysfunction. The accuracy of medium-term spatial memory can be tested by memory-guided saccades (MGS) to evaluate a functional impairment of the parahippocampal cortex (PHC), while voxel-based morphometry (VBM) analysis can be used to detect a structural damage of the latter region. Methods: MGS with 3- and 30-s memorization delays were compared between 7 patients affected by right MTLE-HS (r-MTLE-HS), 6 patients affected by left MTLE-HS, and 13 healthy controls...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29162899/remapping-high-capacity-pre-attentive-fragile-sensory-memory
#11
Paul Zerr, Surya Gayet, Kees Mulder, Yaïr Pinto, Ilja Sligte, Stefan Van der Stigchel
Humans typically make several saccades per second. This provides a challenge for the visual system as locations are largely coded in retinotopic (eye-centered) coordinates. Spatial remapping, the updating of retinotopic location coordinates of items in visuospatial memory, is typically assumed to be limited to robust, capacity-limited and attention-demanding working memory (WM). Are pre-attentive, maskable, sensory memory representations (e.g. fragile memory, FM) also remapped? We directly compared trans-saccadic WM (tWM) and trans-saccadic FM (tFM) in a retro-cue change-detection paradigm...
November 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29159799/memory-for-retinotopic-locations-is-more-accurate-than-memory-for-spatiotopic-locations-even-for-visually-guided-reaching
#12
Anna Shafer-Skelton, Julie D Golomb
To interact successfully with objects, we must maintain stable representations of their locations in the world. However, their images on the retina may be displaced several times per second by large, rapid eye movements. A number of studies have demonstrated that visual processing is heavily influenced by gaze-centered (retinotopic) information, including a recent finding that memory for an object's location is more accurate and precise in gaze-centered (retinotopic) than world-centered (spatiotopic) coordinates (Golomb & Kanwisher, 2012b)...
November 20, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/29129730/how-post-saccadic-target-blanking-affects-the-detection-of-stimulus-displacements-across-saccades
#13
David E Irwin, Maria M Robinson
When a visual stimulus is displaced during a saccade the displacement is often not noticed unless it is large compared to the amplitude of the eye movement. Displacement detection is improved, however, if a blank intervenes between saccade target offset and the presentation of the displaced post-saccadic stimulus. This has been interpreted as evidence that precise information about eye position and accurate memory for the position of the pre-saccadic target are available immediately after saccade offset, but are overridden by the presence of the post-saccadic stimulus if it is present when the eyes land...
November 9, 2017: Vision Research
https://www.readbyqxmd.com/read/29116867/the-effects-of-smoking-abstinence-on-incentivized-spatial-working-memory
#14
Charles Geier, Nicole Roberts, David Lydon-Staley
BACKGROUND AND OBJECTIVE: Reward processing and working memory (WM) underlie value-based decision-making; consequently, joint examination of these systems may further our understanding of why smokers choose to smoke again following a quit attempt (relapse). While previous studies have demonstrated altered reward and WM function associated with nicotine exposure, little is known about the effects of abstinence on the joint function of these systems. The current study aims to address this gap...
November 8, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/29111439/the-effect-of-different-brightness-conditions-on-visually-and-memory-guided-saccades
#15
Anna-Maria Felßberg, Isabel Dombrowe
It is commonly assumed that saccades in the dark are slower than saccades in a lit room. Early studies that investigated this issue using electrooculography (EOG) often compared memory guided saccades in darkness to visually guided saccades in an illuminated room. However, later studies showed that memory guided saccades are generally slower than visually guided saccades. Research on this topic is further complicated by the fact that the different existing eyetracking methods do not necessarily lead to consistent measurements...
October 27, 2017: Vision Research
https://www.readbyqxmd.com/read/29024784/causal-role-of-noradrenaline-in-the-timing-of-internally-generated-saccades-in-monkeys
#16
Tomoki W Suzuki, Masaki Tanaka
We recently found that when monkeys performed an oculomotor version of the time production task, the trial-by-trial latency of self-timed saccades was negatively correlated with pupil diameter just before the delay period (Suzuki et al., 2016). Since pupil diameter has been shown to correlate with neuronal activity in the locus coeruleus, the level of noradrenaline (NA) in the brain might regulate the subjective passage of time. To examine this, we orally administered a selective noradrenaline reuptake inhibitor (reboxetine, 0...
October 9, 2017: Neuroscience
https://www.readbyqxmd.com/read/28984524/population-dynamics-of-early-visual-cortex-during-working-memory
#17
Masih Rahmati, Golbarg T Saber, Clayton E Curtis
Although the content of working memory (WM) can be decoded from the spatial patterns of brain activity in early visual cortex, how populations encode WM representations remains unclear. Here, we address this limitation by using a model-based approach that reconstructs the feature encoded by population activity measured with fMRI. Using this approach, we could successfully reconstruct the locations of memory-guided saccade goals based on the pattern of activity in visual cortex during a memory delay. We could reconstruct the saccade goal even when we dissociated the visual stimulus from the saccade goal using a memory-guided antisaccade procedure...
October 6, 2017: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/28954892/memory-guided-saccades-show-effect-of-perceptual-illusion-whereas-visually-guided-saccades-do-not
#18
Delphine Massendari, Matteo Lisi, Thérèse Collins, Patrick Cavanagh
The double-drift stimulus (a drifting Gabor with orthogonal internal motion) generates a large discrepancy between its physical and perceived path. Surprisingly, saccades directed to the double-drift stimulus land along the physical, and not perceived, path (Lisi & Cavanagh, 2015). Here we asked whether memory-guided saccades exhibited the same dissociation from perception. Participants were asked to keep their gaze centered on a fixation dot while the double-drift stimulus moved back and forth on a linear path in the periphery...
September 27, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28853331/the-effects-of-varying-levels-of-hemispheric-activation-on-episodic-memory
#19
Stephen Prunier, Stephen Christman, John Jasper
Bilateral saccadic eye movements enhance episodic memory retrieval; however, this usually only occurs for consistent-handed, not inconsistent-handed, individuals. It was hypothesized that inconsistent-handers begin closer to the peak of a Yerkes-Dodson-type inverted-U curve and increasing activation pushes them along the curve eventually decreasing performance, while consistent-handers start at a lower baseline and therefore increasing activation increases their performance. The current study tested this hypothesis by using hand clenching (grip strength) to increase activation at 5 different levels for both consistent- and inconsistent-handers...
August 30, 2017: Laterality
https://www.readbyqxmd.com/read/28826493/the-expression-of-established-cognitive-brain-states-stabilizes-with-working-memory-development
#20
David Florentino Montez, Finnegan J Calabro, Beatriz Luna
We present results from a longitudinal study conducted over 10 years in a sample of 126 8-33 year olds demonstrating that adolescent development of working memory is supported by decreased variability in the amplitude of expression of whole brain states of task-related activity. fMRI analyses reveal that putative gain signals affecting maintenance and retrieval aspects of working memory processing stabilize during adolescence, while those affecting sensorimotor processes do not. We show that trial-to-trial variability in the reaction time and accuracy of eye-movements during a memory guided saccade task are related to fluctuations in the amplitude of expression of task-related brain states, or brain state variability, and also provide evidence that individual developmental trajectories of reaction time variability are related to individual trajectories of brain state variability...
August 19, 2017: ELife
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