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https://www.readbyqxmd.com/read/28321696/accelerated-and-accentuated-neurocognitive-aging-in-hiv-infection
#1
David P Sheppard, Jennifer E Iudicello, Erin E Morgan, Rujvi Kamat, Lindsay R Clark, Gunes Avci, Mark W Bondi, Steven Paul Woods
There is debate as to whether the neurocognitive changes associated with HIV infection represent an acceleration of the typical aging process or more simply reflect a greater accentuated risk for age-related declines. We aimed to determine whether accelerated neurocognitive aging is observable in a sample of older HIV-infected individuals compared to age-matched seronegatives and older old (i.e., aged ≥65) seronegative adults. Participants in a cross-sectional design included 48 HIV-seronegative (O-) and 40 HIV-positive (O+) participants between the ages of 50-65 (mean ages = 55 and 56, respectively) and 40 HIV-seronegative participants aged ≥65 (OO-; mean age = 74) who were comparable for other demographics...
March 20, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28321179/neurophysiological-and-behavioral-responses-of-mandarin-lexical-tone-processing
#2
Yan H Yu, Valerie L Shafer, Elyse S Sussman
Language experience enhances discrimination of speech contrasts at a behavioral- perceptual level, as well as at a pre-attentive level, as indexed by event-related potential (ERP) mismatch negativity (MMN) responses. The enhanced sensitivity could be the result of changes in acoustic resolution and/or long-term memory representations of the relevant information in the auditory cortex. To examine these possibilities, we used a short (ca. 600 ms) vs. long (ca. 2,600 ms) interstimulus interval (ISI) in a passive, oddball discrimination task while obtaining ERPs...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28315696/auditory-deficits-in-amusia-extend-beyond-poor-pitch-perception
#3
Kelly L Whiteford, Andrew J Oxenham
Congenital amusia is a music perception disorder believed to reflect a deficit in fine-grained pitch perception and/or short-term or working memory for pitch. Because most measures of pitch perception include memory and segmentation components, it has been difficult to determine the true extent of pitch processing deficits in amusia. It is also unclear whether pitch deficits persist at frequencies beyond the range of musical pitch. To address these questions, experiments were conducted with amusics and matched controls, manipulating both the stimuli and the task demands...
March 15, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28314070/long-lasting-effects-of-chronic-heavy-cannabis-abuse
#4
Joannis N Nestoros, Elena Vakonaki, Manolis N Tzatzarakis, Athanasios Alegakis, Markos D Skondras, Aristidis M Tsatsakis
BACKGROUND AND OBJECTIVES: The purpose of this study was to evaluate the extent of short-term memory impairment and schizophrenia-like symptoms in heavy and systematic cannabis users and the association between the severity of abuse and the longevity of its persistent symptoms after refraining from such use. METHODS: A complete psychiatric examination and a psychometric evaluation were performed in 48 solely cannabis users. Additionally, head hair samples were analyzed and the detected cannabinoids levels were correlated with the psychometric findings...
March 17, 2017: American Journal on Addictions
https://www.readbyqxmd.com/read/28306348/differences-in-dyslexic-students-before-and-after-a-remediation-program-a-clinical-neuropsychological-and-event-related-potential-study
#5
Nikolaos C Zygouris, Elias Avramidis, Argyris V Karapetsas, George I Stamoulis
Developmental dyslexia is defined as an unexpected specific and persistent failure to acquire efficient reading skills despite conventional instruction, adequate intelligence and sociocultural opportunity. This article reports the outcomes of a study that evaluated the implementation of a 4-month intervention program. The intervention consisted of structured activities aiming at improving (a) the children's phonological awareness, (b) their visual and auditory memory, (c) their visual discrimination ability, and (d) their text comprehension...
March 17, 2017: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/28294468/memory-impairment-and-the-mediating-role-of-task-difficulty-in-patients-with-schizophrenia
#6
REVIEW
Kyrsten M Grimes, Anosha Zanjani, Konstantine K Zakzanis, C Psych
Using meta-analytic methods, we sought to synthesize the research literature on memory impairment in schizophrenia. Additionally, we compared performances across memory measures to determine if task difficulty (e.g., effortful encoding and retrieval versus non effortful encoding and retrieval) could account for variance across studies. Our primary measures of interest included the California Verbal Learning Test, Wechsler Memory Scale, Rey Auditory Verbal Learning Test, Hopkins Verbal Learning Test, Rey Osterrieth Complex Figure Test, and the Benton Visual Retention Test...
March 14, 2017: Psychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28293467/relationships-between-cardiorespiratory-fitness-hippocampal-volume-and-episodic-memory-in-a-population-at-risk-for-alzheimer-s-disease
#7
Ryan J Dougherty, Stephanie A Schultz, Elizabeth A Boots, Laura D Ellingson, Jacob D Meyer, Stephanie Van Riper, Aaron J Stegner, Dorothy F Edwards, Jennifer M Oh, Jean Einerson, Claudia E Korcarz, Rebecca L Koscik, Maritza N Dowling, Catherine L Gallagher, Cynthia M Carlsson, Howard A Rowley, Barbara B Bendlin, Sanjay Asthana, Bruce P Hermann, Mark A Sager, James H Stein, Sterling C Johnson, Ozioma C Okonkwo, Dane B Cook
INTRODUCTION: Cardiorespiratory fitness (CRF) has been shown to be related to brain health in older adults. In individuals at risk for developing Alzheimer's disease (AD), CRF may be a modifiable risk factor that could attenuate anticipated declines in brain volume and episodic memory. The objective of this study was to determine the association between CRF and both hippocampal volume and episodic memory in a cohort of cognitively healthy older adults with familial and/or genetic risk for Alzheimer's disease (AD)...
March 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28291864/sex-specific-cognitive-abnormalities-in-early-onset-psychosis
#8
Miguel Ruiz-Veguilla, Josefa Moreno-Granados, Maria D Salcedo-Marin, Maria L Barrigon, Maria J Blanco-Morales, Evelio Igunza, Anselmo Cañabate, Maria D Garcia, Teresa Guijarro, Francisco Diaz-Atienza, Maite Ferrin
Objectives: Brain maturation differs depending on the area of the brain and sex. Girls show an earlier peak in maturation of the prefrontal cortex. Although differences between adult females and males with schizophrenia have been widely studied, there has been less research in girls and boys with psychosis. The purpose of this study was to examine differences in verbal and visual memory, verbal working memory, auditory attention, processing speed, and cognitive flexibility between boys and girls...
January 2017: Revista Brasileira de Psiquiatria
https://www.readbyqxmd.com/read/28289399/auditory-and-vestibular-evoked-potentials-correlate-with-motor-and-non-motor-features-of-parkinson-s-disease
#9
Ali Soliman Shalash, Dalia Mohamed Hassan, Hanan Hani Elrassas, Mohamed Mosaad Salama, Edna Méndez-Hernández, José M Salas-Pacheco, Oscar Arias-Carrión
Degeneration of several brainstem nuclei has been long related to motor and non-motor symptoms (NMSs) of Parkinson's disease (PD). Nevertheless, due to technical issues, there are only a few studies that correlate that association. Brainstem auditory-evoked potential (BAEP) and vestibular-evoked myogenic potential (VEMP) responses represent a valuable tool for brainstem assessment. Here, we investigated the abnormalities of BAEPs, ocular VEMPs (oVEMPs), and cervical VEMPs (cVEMPs) in patients with PD and its correlation to the motor and NMSs...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28288158/stimulus-specific-adaptation-in-a-recurrent-network-model-of-primary-auditory-cortex
#10
Tohar S Yarden, Israel Nelken
Stimulus-specific adaptation (SSA) occurs when neurons decrease their responses to frequently-presented (standard) stimuli but not, or not as much, to other, rare (deviant) stimuli. SSA is present in all mammalian species in which it has been tested as well as in birds. SSA confers short-term memory to neuronal responses, and may lie upstream of the generation of mismatch negativity (MMN), an important human event-related potential. Previously published models of SSA mostly rely on synaptic depression of the feedforward, thalamocortical input...
March 13, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28287018/do-you-remember-where-sounds-pictures-and-words-came-from-the-role-of-the-stimulus-format-in-object-location-memory
#11
Franco Delogu, Christopher C Lilla
Contrasting results in visual and auditory spatial memory stimulate the debate over the role of sensory modality and attention in identity-to-location binding. We investigated the role of sensory modality in the incidental/deliberate encoding of the location of a sequence of items. In 4 separated blocks, 88 participants memorised sequences of environmental sounds, spoken words, pictures and written words, respectively. After memorisation, participants were asked to recognise old from new items in a new sequence of stimuli...
March 13, 2017: Memory
https://www.readbyqxmd.com/read/28286477/transfer-effects-to-a-multimodal-dual-task-after-working-memory-training-and-associated-neural-correlates-in-older-adults-a-pilot-study
#12
Stephan Heinzel, Jérôme Rimpel, Christine Stelzel, Michael A Rapp
Working memory (WM) performance declines with age. However, several studies have shown that WM training may lead to performance increases not only in the trained task, but also in untrained cognitive transfer tasks. It has been suggested that transfer effects occur if training task and transfer task share specific processing components that are supposedly processed in the same brain areas. In the current study, we investigated whether single-task WM training and training-related alterations in neural activity might support performance in a dual-task setting, thus assessing transfer effects to higher-order control processes in the context of dual-task coordination...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28285570/acute-memory-deficits-in-chemotherapy-treated-adults
#13
Oana C Lindner, Andrew Mayes, Martin G McCabe, Deborah Talmi
Data from research on amnesia and epilepsy are equivocal with regards to the dissociation, shown in animal models, between rapid and slow long-term memory consolidation. Cancer treatments have lasting disruptive effects on memory and on brain structures associated with memory, but their acute effects on synaptic consolidation are unknown. We investigated the hypothesis that cancer treatment selectively impairs slow synaptic consolidation. Cancer patients and their matched controls were administered a novel list-learning task modelled on the Rey Auditory Verbal Learning Test...
March 13, 2017: Memory
https://www.readbyqxmd.com/read/28283370/reduced-multimodal-integration-of-memory-features-following-continuous-theta-burst-stimulation-of-angular-gyrus
#14
Yasemin Yazar, Zara M Bergström, Jon S Simons
BACKGROUND: Lesions of the angular gyrus (AnG) region of human parietal cortex do not cause amnesia, but appear to be associated with reduction in the ability to consciously experience the reliving of previous events. OBJECTIVES/HYPOTHESIS: We used continuous theta burst stimulation to test the hypothesis that the cognitive mechanism implicated in this memory deficit might be the integration of retrieved sensory event features into a coherent multimodal memory representation...
March 1, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28277213/the-effect-of-learning-modality-and-auditory-feedback-on-word-memory-cochlear-implanted-versus-normal-hearing-adults
#15
Riki Taitelbaum-Swead, Michal Icht, Yaniv Mama
BACKGROUND: In recent years, the effect of cognitive abilities on the achievements of cochlear implant (CI) users has been evaluated. Some studies have suggested that gaps between CI users and normal-hearing (NH) peers in cognitive tasks are modality specific, and occur only in auditory tasks. PURPOSE: The present study focused on the effect of learning modality (auditory, visual) and auditory feedback on word memory in young adults who were prelingually deafened and received CIs before the age of 5 yr, and their NH peers...
March 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28276864/establishing-normative-data-for-multi-trial-memory-tests-the-multivariate-regression-based-approach
#16
Wim Van der Elst, Geert Molenberghs, Marleen van Tetering, Jelle Jolles
OBJECTIVE: Multi-trial memory tests are widely used in research and clinical practice because they allow for assessing different aspects of memory and learning in a single comprehensive test procedure. However, the use of multi-trial memory tests also raises some key data analysis issues. Indeed, the different trial scores are typically all correlated, and this correlation has to be properly accounted for in the statistical analyses. In the present paper, the focus is on the setting where normative data have to be established for multi-trial memory tests...
February 17, 2017: Clinical Neuropsychologist
https://www.readbyqxmd.com/read/28275059/differences-in-post-injury-auditory-system-pathophysiology-after-mild-blast-and-non-blast-acute-acoustic-trauma
#17
Nicholas Race, Jesyin Lai, Riyi Shi, Edward L Bartlett
Hearing difficulties are the most commonly reported disabilities among veterans. Blast exposures during explosive events likely play a role, given their propensity to directly damage both peripheral (PAS) and central (CAS) auditory system components. Post-blast PAS pathophysiology has been well-documented in both clinical case reports and laboratory investigations. In contrast, blast-induced CAS dysfunction remains under-studied, but has been hypothesized to contribute to an array of common veteran behavioral complaints including learning, memory, communication, and emotional regulation...
March 8, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28274963/mri-based-comparative-study-of-different-mild-cognitive-impairment-subtypes-protocol-for-an-observational-case-control-study
#18
Yang Yu, Weina Zhao, Siou Li, Changhao Yin
INTRODUCTION: Amnestic mild cognitive impairment (aMCI) and vascular mild cognitive impairment (VaMCI) comprise the 2 main types of mild cognitive impairment (MCI). The first condition generally progresses to Alzheimer's disease, whereas the second is likely to develop into vascular dementia (VD). The brain structure and function of patients with MCI differ from those of normal elderly individuals. However, whether brain structures or functions differ between these 2 MCI subtypes has not been studied...
March 8, 2017: BMJ Open
https://www.readbyqxmd.com/read/28274824/extinction-after-fear-memory-reactivation-fails-to-eliminate-renewal-in-rats
#19
Travis D Goode, Crystal M Holloway-Erickson, Stephen Maren
Retrieving fear memories just prior to extinction has been reported to effectively erase fear memories and prevent fear relapse. The current study examined whether the type of retrieval procedure influences the ability of extinction to impair fear renewal, a form of relapse in which responding to a conditional stimulus (CS) returns outside of the extinction context. Rats first underwent Pavlovian fear conditioning with an auditory CS and footshock unconditional stimulus (US); freezing behavior served as the index of conditioned fear...
March 5, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28270570/baf53b-a-neuron-specific-nucleosome-remodeling-factor-is-induced-after-learning-and-facilitates-long-term-memory-consolidation
#20
Miran Yoo, Kwang-Yeon Choi, Jieun Kim, Mujun Kim, Jaehoon Shim, Jun-Hyeok Choi, Hye-Yeon Cho, Jungpyo Oh, Hyung-Su Kim, Bong-Kiun Kaang, Jin-Hee Han
Although epigenetic mechanisms of gene expression regulation have recently been implicated in memory consolidation and persistence, the role of nucleosome-remodeling is largely unexplored. Recent studies show that the functional loss of BAF53b, a post-mitotic neuron-specific subunit of the BAF nucleosome-remodeling complex, results in the deficit of consolidation of hippocampus-dependent memory and cocaine-associated memory in the rodent brain. However, it is unclear whether BAF53b expression is regulated during memory formation and how BAF53b regulates fear memory in the amygdala, a key brain site for fear memory encoding and storage...
March 7, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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