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https://www.readbyqxmd.com/read/29038221/prazosin-during-threat-discrimination-boosts-memory-of-the-safe-stimulus
#1
Philipp Homan, Qi Lin, James W Murrough, Laili Soleimani, Dominik R Bach, Roger L Clem, Daniela Schiller
The α-1 adrenoreceptor antagonist prazosin has shown promise in the treatment of post-traumatic stress disorder (PTSD) symptoms, but its mechanisms are not well understood. Here we administered prazosin or placebo prior to threat conditioning (day 1) and tested subsequent extinction (day 2) and reextinction (day 3) in healthy human participants. Prazosin did not affect threat conditioning but augmented stimulus discrimination during extinction and reextinction, via lower responding to the safe stimulus. These results suggest that prazosin during threat acquisition may have influenced encoding or consolidation of safety processing in particular, subsequently leading to enhanced discrimination between the safe and threatening stimuli...
November 2017: Learning & Memory
https://www.readbyqxmd.com/read/29034310/further-education-improves-cognitive-reserve-and-triggers-improvement-in-selective-cognitive-functions-in-older-adults-the-tasmanian-healthy-brain-project
#2
Megan E Thow, Mathew J Summers, Nichole L Saunders, Jeffery J Summers, Karen Ritchie, James C Vickers
INTRODUCTION: The strong link between early-life education and subsequent reduced risk of dementia suggests that education in later life could enhance cognitive function and may reduce age-related cognitive decline and protect against dementia. METHODS: Episodic memory, working memory, executive function, and language processing performances were assessed annually over 4 years in 359 healthy older adults who attended university for a minimum of 12 months (intervention) and were compared against 100 healthy adult controls...
2018: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/29024892/life-review-therapy-enhances-mental-time-travel-in-patients-with-schizophrenia
#3
Gui-Fang Chen, Lu-Lu Liu, Ji-Fang Cui, Tao Chen, Xiao-Jing Qin, Jie-Chun Gan, Bin Bi, David L Neumann, David H K Shum, Ya Wang, Raymond C K Chan
Mental Time Travel (MTT) is the ability of individuals to project themselves to the past or to the future. Studies have shown that schizophrenia (SZ) patients are impaired in MTT. The present study aimed to examine whether MTT in patients with SZ can be improved through Life Review Therapy. Fifty patients with SZ were randomly assigned to the training (SZ-training) or control (SZ-control) group. Whereas the SZ-training group received four-week Life Review Therapy in addition to conventional treatment, the SZ-control group only received conventional treatment...
October 3, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29018381/the-role-of-working-memory-for-cognitive-control-in-anorexia-nervosa-versus-substance-use-disorder
#4
REVIEW
Samantha J Brooks, Sabina G Funk, Susanne Y Young, Helgi B Schiöth
Prefrontal cortex executive functions, such as working memory (WM) interact with limbic processes to foster impulse control. Such an interaction is referred to in a growing body of publications by terms such as cognitive control, cognitive inhibition, affect regulation, self-regulation, top-down control, and cognitive-emotion interaction. The rising trend of research into cognitive control of impulsivity, using various related terms reflects the importance of research into impulse control, as failure to employ cognitions optimally may eventually result in mental disorder...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28993814/a-dopamine-receptor-genetic-variant-enhances-perceptual-speed-in-cognitive-healthy-subjects
#5
S Barral, C Habeck, E Gazes, P L De Jager, D A Bennett, Y Stern
Cognition is under strong genetic control, yet the specific genes are unknown. To investigate genetic influences on specific cognitive domains, 153 cognitive healthy subjects of European ancestry from the Reference Abilities Study (RANN) were genotyped for 1,160 variants within 446 neuropsychiatric genes. Adjusted linear regression models evaluated the association between the genetic variants and four reference abilities, which capture variance in age-related cognitive function (Vocabulary, Episodic Memory, Perceptual Speed, and Reasoning)...
June 2017: Alzheimer's & Dementia: Translational Research & Clinical Interventions
https://www.readbyqxmd.com/read/28987780/different-levels-of-visual-perceptual-skills-are-associated-with-specific-modifications-in-functional-connectivity-and-global-efficiency
#6
Sabrina Danti, Giacomo Handjaras, Luca Cecchetti, Helen Beuzeron-Mangina, Pietro Pietrini, Emiliano Ricciardi
The disembedding ability (i.e., the ability to identify a simple masked figure within a complex one) depends on attentional mechanisms, executive functions and working memory. Recent cognitive models ascribed different levels of disembedding task performance to the efficiency of the subtended mental processes engaged during visuo-spatial perception. Here we aimed at assessing whether different levels of the disembedding ability were associated to the functional signatures of neural efficiency, defined as a specific modulation in response magnitude and functional connectivity strength in task-related areas...
October 5, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28985739/a-lipidated-peptide-of-mycobacterium-tuberculosis-resuscitates-the-protective-efficacy-of-bcg-vaccine-by-evoking-memory-t-cell-immunity
#7
Pradeep K Rai, Sathi Babu Chodisetti, Weiguang Zeng, Sajid Nadeem, Sudeep K Maurya, Susanta Pahari, Ashok K Janmeja, David C Jackson, Javed N Agrewala
BACKGROUND: The current BCG vaccine induces only short-term protection against Mycobacterium tuberculosis (Mtb), suggesting its failure to generate long-lasting memory T cells. Previously, we have demonstrated that a self-adjuvanting peptide of Mtb (L91), successfully generated enduring memory Th1 cells. Consequently, we investigated if L91 was able to recuperate BCG potency in perpetuating the generation of memory T cells and protection against Mtb infected mice. METHODS: In the present study, we evaluated the potency of a self adjuvanting Mtb peptide vaccine L91 in invigorating BCG immune response against Mtb in mice...
October 6, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28974716/cognitive-control-during-audiovisual-working-memory-engages-frontotemporal-theta-band-interactions
#8
Jonathan Daume, Sebastian Graetz, Thomas Gruber, Andreas K Engel, Uwe Friese
Working memory (WM) maintenance of sensory information has been associated with enhanced cross-frequency coupling between the phase of low frequencies and the amplitude of high frequencies, particularly in medial temporal lobe (MTL) regions. It has been suggested that these WM maintenance processes are controlled by areas of the prefrontal cortex (PFC) via frontotemporal phase synchronisation in low frequency bands. Here, we investigated whether enhanced cognitive control during audiovisual WM as compared to visual WM alone is associated with increased low-frequency phase synchronisation between sensory areas maintaining WM content and areas from PFC...
October 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28971466/the-effects-of-anodal-transcranial-direct-current-stimulation-on-working-memory
#9
Marianna Katsoulaki, Alexandros Kastrinis, Maria Tsekoura
The aim of this paper was to review the effects of anodal transcranial direct current stimulation (tdcs) on working memory in healthy population. Ten studies were identified involving 319 subjects. Working memory performance was measured using cognitive tasks such as the n-back task, digit span forward or digit span backwards test, Sternberg WM task, the Pacet Auditory Serial Addition Task (PASAT) and the Pacet Auditory Serial Subtraction Task (PASST), verbal and visuospatial tasks and the Operation Span (OSpan) task...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28968656/aerobic-fitness-explains-individual-differences-in-the-functional-brain-connectome-of-healthy-young-adults
#10
Tanveer Talukdar, Aki Nikolaidis, Chris E Zwilling, Erick J Paul, Charles H Hillman, Neal J Cohen, Arthur F Kramer, Aron K Barbey
A wealth of neuroscience evidence demonstrates that aerobic fitness enhances structural brain plasticity, promoting the development of gray matter volume and maintenance of white matter integrity within networks for executive function, attention, learning, and memory. However, the role of aerobic fitness in shaping the functional brain connectome remains to be established. The present work therefore investigated the effects of aerobic fitness (as measured by VO2max) on individual differences in whole-brain functional connectivity assessed from resting state fMRI data...
September 14, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28959200/open-and-closed-skill-exercise-interventions-produce-different-neurocognitive-effects-on-executive-functions-in-the-elderly-a-6-month-randomized-controlled-trial
#11
Chia-Liang Tsai, Chien-Yu Pan, Fu-Chen Chen, Yu-Ting Tseng
This study aimed to explore the effects of open- and closed-skill exercise interventions on the neurocognitive performance of executive functions in the elderly. Sixty-four healthy elderly males were randomly assigned to either a closed-skill (bike riding or brisk walking/jogging, n = 22), open-skill (table tennis, n = 21), or control (n = 21) group. Various neuropsychological [e.g., accuracy rates (AR) and reaction time (RT)] and electrophysiological [e.g., event-related potential (ERP) P3 component] measures were assessed during a variant of the task-switching paradigm, as well as an N-back task at baseline and after either a 6-month exercise intervention or control period...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28948980/neural-underpinnings-of-cortisol-effects-on-fear-extinction
#12
Christian Josef Merz, Tanja Christina Hamacher-Dang, Rudolf Stark, Oliver Tobias Wolf, Andrea Hermann
Extinction of conditioned fear embodies a crucial mechanism incorporated in exposure therapy. Clinical studies demonstrated that application of the stress hormone cortisol prior to exposure sessions facilitates exposure success, but the underlying neural correlates remain unknown. Context- and stimulus-dependent cortisol effects on extinction learning will be characterized in this study and tested in the extinction and in a new context. Forty healthy men participated in a three-day fear conditioning experiment with fear acquisition in context A (day 1), extinction training in context B (day 2), and recall in context B and a new context C one week later (day 3)...
September 26, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28941875/face-and-gaze-perception-in-borderline-personality-disorder-an-electrical-neuroimaging-study
#13
Cristina Berchio, Camille Piguet, Kornelia Gentsch, Anne-Lise Küng, Tonia A Rihs, Roland Hasler, Jean-Michel Aubry, Alexandre Dayer, Christoph M Michel, Nader Perroud
Humans are sensitive to gaze direction from early life, and gaze has social and affective values. Borderline personality disorder (BPD) is a clinical condition characterized by emotional dysregulation and enhanced sensitivity to affective and social cues. In this study we wanted to investigate the temporal-spatial dynamics of spontaneous gaze processing in BPD. We used a 2-back-working-memory task, in which neutral faces with direct and averted gaze were presented. Gaze was used as an emotional modulator of event-related-potentials to faces...
September 15, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28940416/neurotransmitter-signaling-via-nmda-receptors-leads-to-decreased-th1-like-and-enhanced-th2-like-immune-balance-in-humans
#14
Kanami Orihara, Solomon O Odemuyiwa, Bill Stefura, Ramses Ilarraza, Kent T HayGlass, Redwan Moqbel
Given the pivotal roles that CD4 T cell imbalance plays in human immune disorders, much interest centres on better understanding influences that regulate human helper T cell subset dominance in vivo. Here, using primary CD4 T cells and short-term Th1 and Th2-like lines, we investigated roles and mechanisms by which neurotransmitter receptors may influence human Type 1 vs Type 2 immunity. We hypothesized N-methyl-D-aspartate receptors (NMDA-R), which play key roles in memory and learning, can also regulate human CD4+ T cell function through induction of excitotoxicity...
September 22, 2017: Immunology
https://www.readbyqxmd.com/read/28939415/qualitative-differences-in-offline-improvement-of-procedural-memory-by-daytime-napping-and-overnight-sleep-an-fmri-study
#15
Sho K Sugawara, Takahiko Koike, Hiroaki Kawamichi, Kai Makita, Yuki H Hamano, Haruka K Takahashi, Eri Nakagawa, Norihiro Sadato
Daytime napping offers various benefits for healthy adults, including enhancement of motor skill learning. It remains controversial whether napping can provide the same enhancement as overnight sleep, and if so, whether the same neural underpinning is recruited. To investigate this issue, we conducted functional MRI during motor skill learning, before and after a short day-nap, in 13 participants, and compared them with a larger group (n=47) who were tested following regular overnight sleep. Training in a sequential finger-tapping task required participants to press a keyboard in the MRI scanner with their non-dominant left hand as quickly and accurately as possible...
September 20, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28932777/dataset-on-the-associations-between-sleep-quality-duration-and-cognitive-performance-in-cognitively-healthy-older-adults
#16
A Tsapanou, Y Gu, D M O'Shea, M Yannakoulia, M H Kosmidis, E Dardiotis, G Hadjigeorgiou, P Sakka, Y Stern, N Scarmeas
In the present data, we provide the details of the cross-sectional study examining the associations between sleep quality/sleep duration and cognitive performance. Data are from the Hellenic Longitudinal Investigation of Aging and Diet (HELIAD). A total of 1484 older adults (65 y.o. or older) took part in the study. Sleep measurements were drawn from the sleep scale of the Medical Outcomes Study (MOS). Cognition was used as a z-score drawn by different tests. The domains examined were: executive function, visuo-spatial ability, language, attention- speed of processing, as well as the composite z-score of all the cognitive domains (including memory)...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28931520/dna-priming-increases-frequency-of-t-cell-responses-to-a-vsv-hiv-vaccine-with-specific-enhancement-of-cd8-t-cell-responses-by-il-12-pdna
#17
Shuying S Li, Nidhi K Kochar, Marnie Elizaga, Christine M Hay, Gregory J Wilson, Kristen W Cohen, Stephen C De Rosa, Rong Xu, Ayuko Ota-Setlik, Daryl Morris, Greg Finak, Mary Allen, Hong-Van Tieu, Ian Frank, Magdalena E Sobieszczyk, Drew Hannaman, Raphael Gottardo, Peter B Gilbert, Georgia D Tomaras, Lawrence Corey, David K Clarke, Michael A Egan, John H Eldridge, M Juliana McElrath, Nicole Frahm
HVTN 087 assessed the effect of increasing doses of pIL-12 adjuvant on the immunogenicity of a HIV-1 multi-antigen (MAG) DNA vaccine delivered by electroporation and boosted with an attenuated VSV-Gag vaccine. We randomized 100 healthy adults to receive placebo, or 3mg HIV-MAG (gag/pol, env, nef/tat/vif) DNA vaccine co-administered with pIL-12 at 0μg, 250μg, 1,000μg or 1,500μg intramuscularly by electroporation at 0, 1 and 3 months followed by intramuscular inoculation with 3.4×10(7) PFU VSV-Gag vaccine at 6 months...
September 20, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28922397/acute-exposure-to-blue-wavelength-light-during-memory-consolidation-improves-verbal-memory-performance
#18
RANDOMIZED CONTROLLED TRIAL
Anna Alkozei, Ryan Smith, Natalie S Dailey, Sahil Bajaj, William D S Killgore
Acute exposure to light within the blue wavelengths has been shown to enhance alertness and vigilance, and lead to improved speed on reaction time tasks, possibly due to activation of the noradrenergic system. It remains unclear, however, whether the effects of blue light extend beyond simple alertness processes to also enhance other aspects of cognition, such as memory performance. The aim of this study was to investigate the effects of a thirty minute pulse of blue light versus placebo (amber light) exposure in healthy normally rested individuals in the morning during verbal memory consolidation (i...
2017: PloS One
https://www.readbyqxmd.com/read/28916628/the-impact-of-threat-of-shock-induced-anxiety-on-memory-encoding-and-retrieval
#19
Sorcha Bolton, Oliver J Robinson
Anxiety disorders are the most common mental health disorders, and daily transient feelings of anxiety (or "stress") are ubiquitous. However, the precise impact of both transient and pathological anxiety on higher-order cognitive functions, including short- and long-term memory, is poorly understood. A clearer understanding of the anxiety-memory relationship is important as one of the core symptoms of anxiety, most prominently in post-traumatic stress disorder (PTSD), is intrusive reexperiencing of traumatic events in the form of vivid memories...
October 2017: Learning & Memory
https://www.readbyqxmd.com/read/28915366/structural-encoding-processes-contribute-to-individual-differences-in-face-and-object-cognition-inferences-from-psychometric-test-performance-and-event-related-brain-potentials
#20
Hadiseh Nowparast Rostami, Werner Sommer, Changsong Zhou, Oliver Wilhelm, Andrea Hildebrandt
The enhanced N1 component in event-related potentials (ERP) to face stimuli, termed N170, is considered to indicate the structural encoding of faces. Previously, individual differences in the latency of the N170 have been related to face and object cognition abilities. By orthogonally manipulating content domain (faces vs objects) and task demands (easy/speed vs difficult/accuracy) in both psychometric and EEG tasks, we investigated the uniqueness of the processes underlying face cognition as compared with object cognition and the extent to which the N1/N170 component can explain individual differences in face and object cognition abilities...
August 19, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
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