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Visual short term memory

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https://www.readbyqxmd.com/read/28632102/effect-of-transient-perturbations-of-short-term-memory-on-target-directed-blind-locomotion
#1
Sarah Piekarski, Yves Lajoie, Nicole Paquet
It is difficult to walk without vision to a nearby destination if there is a time delay between watching the destination and walking toward it. Indeed, path deviation occurred when delays were introduced before initiating straight ahead blindfolded walking (R. A. Tyrrell, K. K., Rudolph, B. G., Eggers, & H. W. Leibowitz, 1993 ). The questions are whether the location of a 60-s delay in the walking path and whether performing a cognitive task during the delay influence the accuracy in reaching a previously seen target while walking without vision...
March 2, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28611821/patients-with-mild-cognitive-impairment-show-lower-visual-short-term-memory-performance-in-feature-binding-tasks
#2
Raju P Sapkota, Ian van der Linde, Nirmal Lamichhane, Tirthalal Upadhyaya, Shahina Pardhan
BACKGROUND: Early cognitive changes in people at risk of developing dementia may be detected using behavioral tests that examine the performance of typically affected brain areas, such as the hippocampi. An important cognitive function supported by the hippocampi is memory binding, in which object features are associated to create a unified percept. AIM: To compare visual short-term memory (VSTM) binding performance for object names, locations, and identities between a participant group known to be at higher risk of developing dementia (mild cognitive impairment [MCI]) and healthily aging controls...
January 2017: Dementia and Geriatric Cognitive Disorders Extra
https://www.readbyqxmd.com/read/28595141/the-interplay-of-language-and-visual-perception-in-working-memory
#3
Alessandra S Souza, Zuzanna Skóra
How do perception and language interact to form the representations that guide our thoughts and actions over the short-term? Here, we provide a first examination of this question by investigating the role of verbal labels in a continuous visual working memory (WM) task. Across four experiments, participants retained in memory the continuous color of a set of dots which were presented sequentially (Experiments 1-3) or simultaneously (Experiment 4). At test, they reproduced the colors of all dots using a color wheel...
June 5, 2017: Cognition
https://www.readbyqxmd.com/read/28590881/effects-of-irrelevant-background-speech-on-eye-movements-during-reading
#4
Guoli Yan, Zhu Meng, Nina Liu, Liyuan He, Kevin B Paterson
The irrelevant speech effect (ISE) refers to the impairment of visual information processing by background speech. Prior research on the ISE has focused on short-term memory for visually-presented word lists. The present research extends this work by using measurements of eye movements to examine effects of irrelevant background speech during Chinese reading. This enabled an examination of the ISE for a language in which access to semantic representations is not strongly mediated by phonology. Participants read sentences while exposed to meaningful irrelevant speech, meaningless speech (scrambled meaningful speech) or silence...
June 7, 2017: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/28581310/patients-with-parkinson-s-disease-display-a-dopamine-therapy-related-negative-bias-and-an-enlarged-range-in-emotional-responses-to-facial-emotional-stimuli
#5
Daniel Lundqvist, Joakim Svärd, Åsa Michelgård Palmquist, Håkan Fischer, Per Svenningsson
OBJECTIVE: The literature on emotional processing in Parkinson's disease (PD) patients shows mixed results. This may be because of various methodological and/or patient-related differences, such as failing to adjust for cognitive functioning, depression, and/or mood. METHOD: In the current study, we tested PD patients and healthy controls (HCs) using emotional stimuli across a variety of tasks, including visual search, short-term memory (STM), categorical perception, and emotional stimulus rating...
June 5, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28579311/lower-cognitive-performance-among-long-term-type-1-diabetes-survivors-a-case-control-study
#6
Anna Awad, Robert Lundqvist, Olov Rolandsson, Anna Sundström, Mats Eliasson
OBJECTIVE: Patients with type 1 diabetes (T1D) have an increased risk of cognitive dysfunction. The cognitive decrement is believed to depend on macro- and microvascular complications and long disease duration. Some patients do not develop these complications, but still report cognitive symptoms. We examined if long-standing T1D without complications is associated with lower cognitive performance. METHODS: A group of patients (n=43) with long-standing T1D (>30years) without micro- or macro vascular complications was compared with a non-diabetic control group (n=86) on six cognitive tests which probed episodic memory, semantic memory, episodic short-term memory, visual attention and psychomotor speed...
May 4, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28579056/-computerized-oculomotor-training-in-dyslexia-a-randomized-crossover-clinical-trial-in-pediatric-population
#7
H Peyre, C-L Gérard, I Dupong Vanderhorst, S Larger, C Lemoussu, J Vesta, E Bui Quoc, N Gouleme, R Delorme, M P Bucci
OBJECTIVE: Several studies have reported abnormal oculomotor capacities leading to reading/writing difficulties among dyslexic children. However, no randomized clinical trial has been conducted to determine whether oculomotor training improves reading/writing skills of these children. The present study aims to evaluate the efficacy of computer-based oculomotor training among dyslexic children. METHOD: Crossover randomized trial with enrollment from January 12, 2015 to July 24, 2015, and follow-up to February 4, 2016...
June 1, 2017: L'Encéphale
https://www.readbyqxmd.com/read/28566958/cognitive-outcome-after-surgery-in-patients-with-mesial-temporal-lobe-epilepsy
#8
Günay Gül, Demet Yandim Kuşcu, Mesude Özerden, Melek Kandemir, Fulya Eren, Bekir Tuğcu, Cahit Keskinkiliç, Nalan Kayrak, Dursun Kirbaş
INTRODUCTION: The aim of the present study was to evaluate the neuropsychological outcomes of patients with medically intractable unilateral mesial temporal lobe epilepsy (MTLE) due to hippocampal sclerosis (HS) treated either by anterior temporal lobectomy (ATL) or selective amygdalohippocampectomy (SAH). METHODS: This was a retrospective study where 67 patients who had undergone surgery for MTLE were evaluated. Thirty-two patients underwent ATL and 35 underwent SAH...
March 2017: Noro Psikiyatri Arsivi
https://www.readbyqxmd.com/read/28558154/theta-paced-flickering-between-place-cell-maps-in-the-hippocampus-a-model-based-on-short-term-synaptic-plasticity
#9
Shirley Mark, Sandro Romani, Karel Jezek, Misha Tsodyks
Hippocampal place cells represent different environments with distinct neural activity patterns. Following an abrupt switch between two familiar configurations of visual cues defining two environments, the hippocampal neural activity pattern switches almost immediately to the corresponding representation. Surprisingly, during a transient period following the switch to the new environment, occasional fast transitions of activity patterns between the representations (flickering) were observed (Jezek et al. 2011)...
May 30, 2017: Hippocampus
https://www.readbyqxmd.com/read/28555099/load-dependent-increases-in-delay-period-alpha-band-power-track-the-gating-of-task-irrelevant-inputs-to-working-memory
#10
Andrew J Heinz, Jeffrey S Johnson
Studies exploring the role of neural oscillations in cognition have revealed sustained increases in alpha-band power (ABP) during the delay period of verbal and visual working memory (VWM) tasks. There have been various proposals regarding the functional significance of such increases, including the inhibition of task-irrelevant cortical areas as well as the active retention of information in VWM. The present study examines the role of delay-period ABP in mediating the effects of interference arising from on-going visual processing during a concurrent VWM task...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28552331/effects-of-neurofeedback-on-the-short-term-memory-and-continuous-attention-of-patients-with-moderate-traumatic-brain-injury-a-preliminary-randomized-controlled-clinical-trial
#11
Reza Rostami, Payman Salamati, Kourosh Karimi Yarandi, Alireza Khoshnevisan, Soheil Saadat, Zeynab Sadat Kamali, Somaie Ghiasi, Atefeh Zaryabi, Seyed Shahab Ghazi Mir Saeid, Mehdi Arjipour, Mohammad Saeid Rezaee-Zavareh, Vafa Rahimi-Movaghar
PURPOSE: There are some studies which showed neurofeedback therapy (NFT) can be effective in clients with traumatic brain injury (TBI) history. However, randomized controlled clinical trials are still needed for evaluation of this treatment as a standard option. This preliminary study was aimed to evaluate the effect of NFT on continuous attention (CA) and short-term memory (STM) of clients with moderate TBI using a randomized controlled clinical trial (RCT). METHODS: In this preliminary RCT, seventeen eligible patients with moderate TBI were randomly allocated in two intervention and control groups...
May 18, 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28537006/feature-binding-in-visual-short-term-memory-a-general-recognition-theory-analysis
#12
Daniel Fitousi
Creating and maintaining accurate bindings of elementary features (e.g., color and shape) in visual short-term memory (VSTM) is fundamental for veridical perception. How are low-level features bound in memory? The present work harnessed a multivariate model of perception - the General Recognition Theory (GRT) - to unravel the internal representations underlying feature binding in VSTM. On each trial, preview and target colored shapes were presented in succession, appearing in either repeated or altered spatial locations...
May 23, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28536070/cotinine-improves-visual-recognition-memory-and-decreases-cortical-tau-phosphorylation-in-the-tg6799-mice
#13
J Alex Grizzell, Sagar Patel, George E Barreto, Valentina Echeverria
Alzheimer's disease (AD) is associated with the progressive aggregation of hyperphosphorylated forms of the microtubule associated protein Tau in the central nervous system. Cotinine, the main metabolite of nicotine, reduced working memory deficits, synaptic loss, and amyloid β peptide aggregation into oligomers and plaques as well as inhibited the cerebral Tau kinase, glycogen synthase 3β (GSK3β) in the transgenic (Tg)6799 (5XFAD) mice. In this study, the effect of cotinine on visual recognition memory and cortical Tau phosphorylation at the GSK3β sites Serine (Ser)-396/Ser-404 and phospho-CREB were investigated in the Tg6799 and non-transgenic (NT) littermate mice...
May 20, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28526621/electrophysiological-signatures-of-phonological-and-semantic-maintenance-in-sentence-repetition
#14
Jed A Meltzer, Aneta Kielar, Lilia Panamsky, Kira A Links, Tiffany Deschamps, Rosie C Leigh
Verbal short-term memory comprises resources for phonological rehearsal, which have been characterized anatomically, and for maintenance of semantic information, which are less understood. Sentence repetition tasks tap both processes interactively. To distinguish brain activity involved in phonological vs. semantic maintenance, we recorded magnetoencephalography during a sentence repetition task, incorporating three manipulations emphasizing one mechanism over the other. Participants heard sentences or word lists and attempted to repeat them verbatim after a 5-second delay...
May 17, 2017: NeuroImage
https://www.readbyqxmd.com/read/28497530/short-term-memory-in-childhood-dyslexia-deficient-serial-order-in-multiple-modalities
#15
Nelson Cowan, Tiffany P Hogan, Mary Alt, Samuel Green, Kathryn L Cabbage, Shara Brinkley, Shelley Gray
In children with dyslexia, deficits in working memory have not been well-specified. We assessed second-grade children with dyslexia, with and without concomitant specific language impairment, and children with typical development. Immediate serial recall of lists of phonological (non-word), lexical (digit), spatial (location) and visual (shape) items were included. For the latter three modalities, we used not only standard span but also running span tasks, in which the list length was unpredictable to limit mnemonic strategies...
May 12, 2017: Dyslexia: the Journal of the British Dyslexia Association
https://www.readbyqxmd.com/read/28489656/consequences-of-traumatic-brain-injury-in-professional-american-football-players-a-systematic-review-of-the-literature
#16
Bodil C Vos, Karen Nieuwenhuijsen, Judith K Sluiter
OBJECTIVE: The purpose of this study was to systematically review the literature for the consequences Traumatic brain injury (TBI) has on cognitive, psychological, physical, and sports-related functioning in professional American Football players. DATA SOURCES: We performed a systematic search in 2 databases, PubMed and SPORTDiscus, to obtain literature from January 1990 to January 2015. To be eligible for inclusion, a study had to examine the relationship between TBI and the consequences for several aspects of functioning in professional American football players older than 18 years...
May 9, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28475047/retrieval-of-sentence-sequences-for-an-image-stream-via-coherence-recurrent-convolutional-networks
#17
Cesc Park, Youngjin Kim, Gunhee Kim
We propose an approach for retrieving a sequence of natural sentences for an image stream. Since general users often take a series of pictures on their experiences, much online visual information exists in the form of image streams, for which it would better take into consideration of the whole image stream to produce natural language descriptions. While almost all previous studies have dealt with the relation between a single image and a single natural sentence, our work extends both input and output dimension to a sequence of images and a sequence of sentences...
May 2, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28471211/arithmetical-calculation-and-related-neuropsychological-skills-in-subjects-with-isolated-oral-clefts
#18
Jon W Goodwin, Amy L Conrad, Timothy Ansley, Peg Nopoulos
OBJECTIVE: The current study examined whether the arithmetical calculation skills of children, adolescents, and young adults with isolated cleft of the lip and/or palate (iCL/P) differ significantly from unaffected control participants. Comparisons of potential neuropsychological predictors of arithmetical calculation were also conducted to determine whether these variables differ significantly for participants with iCL/P. METHOD: Participants (N = 176; 93 iCL/P and 83 Control) ranged in age from 7 to 26 years old...
May 4, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28470910/word-decoding-development-during-phonics-instruction-in-children-at-risk-for-dyslexia
#19
Moniek M H Schaars, Eliane Segers, Ludo Verhoeven
In the present study, we examined the early word decoding development of 73 children at genetic risk of dyslexia and 73 matched controls. We conducted monthly curriculum-embedded word decoding measures during the first 5 months of phonics-based reading instruction followed by standardized word decoding measures halfway and by the end of first grade. In kindergarten, vocabulary, phonological awareness, lexical retrieval, and verbal and visual short-term memory were assessed. The results showed that the children at risk were less skilled in phonemic awareness in kindergarten...
May 2017: Dyslexia: the Journal of the British Dyslexia Association
https://www.readbyqxmd.com/read/28461479/visual-working-memory-buffers-information-retrieved-from-visual-long-term-memory
#20
Keisuke Fukuda, Geoffrey F Woodman
Human memory is thought to consist of long-term storage and short-term storage mechanisms, the latter known as working memory. Although it has long been assumed that information retrieved from long-term memory is represented in working memory, we lack neural evidence for this and need neural measures that allow us to watch this retrieval into working memory unfold with high temporal resolution. Here, we show that human electrophysiology can be used to track information as it is brought back into working memory during retrieval from long-term memory...
May 16, 2017: Proceedings of the National Academy of Sciences of the United States of America
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