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https://www.readbyqxmd.com/read/27913591/temporal-expectations-guide-dynamic-prioritization-in-visual-working-memory-through-attenuated-alpha-oscillations
#1
Freek van Ede, Marcel Niklaus, Anna C Nobre
: While working memory is generally considered a highly dynamic mnemonic store, popular laboratory tasks employed to understand its psychological and neural mechanisms (such as change detection and continuous reproduction) often remain relatively "static", involving the retention of a set number of items throughout a shared delay interval. In the current study, we investigated visual working memory in a more dynamic setting, and assessed: 1) whether internally guided temporal expectations can dynamically and reversibly prioritize individual mnemonic items at specific times at which they are deemed most relevant and 2) the neural substrates that support such dynamic prioritization...
December 2, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27911706/using-induced-pluripotent-stem-cells-to-understand-retinal-ciliopathy-disease-mechanisms-and-develop-therapies
#2
REVIEW
David A Parfitt, Amelia Lane, Conor Ramsden, Katarina Jovanovic, Peter J Coffey, Alison J Hardcastle, Michael E Cheetham
The photoreceptor cells in the retina have a highly specialised sensory cilium, the outer segment (OS), which is important for detecting light. Mutations in cilia-related genes often result in retinal degeneration. The ability to reprogramme human cells into induced pluripotent stem cells and then differentiate them into a wide range of different cell types has revolutionised our ability to study human disease. To date, however, the challenge of producing fully differentiated photoreceptors in vitro has limited the application of this technology in studying retinal degeneration...
October 15, 2016: Biochemical Society Transactions
https://www.readbyqxmd.com/read/27911409/measuring-progressive-neurological-disability-in-a-mouse-model-of-multiple-sclerosis
#3
Francesca Gilli, Darlene B Royce, Andrew R Pachner
After intracerebral infection with the Theiler's Murine Encephalomyelitis Virus (TMEV), susceptible SJL mice develop a chronic-progressive demyelinating disease, with clinical features similar to the progressive forms of multiple sclerosis (MS). The mice show progressive disability with loss of motor and sensory functions, which can be assessed with multiple apparatuses and protocols. Among them, the Rotarod performance test is a very common behavioral test, its advantage being that it provides objective measurements, but it is often used assuming that it is straightforward and simple...
November 14, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27911283/association-between-physical-activity-and-pain-processing-in-adults-with-chronic-low-back-pain-compared-to-pain-free-controls
#4
Lindsay C Orr, Steven Z George, Corey B Simon
BACKGROUND: Pain sensitivity has been negatively associated with physical activity levels. Few studies have examined associations between experimentally induced pain sensitivity and physical activity in adults with chronic low back pain and pain-free controls. OBJECTIVE: The objective of this study was to examine associations between physical activity levels and how an individual processes pain using experimentally induced pain stimuli. METHODS: Seventy subjects (CLBP = 49; mean age = 46...
November 25, 2016: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/27909402/upright-perception-and-ocular-torsion-change-independently-during-head-tilt
#5
Jorge Otero-Millan, Amir Kheradmand
We maintain a stable perception of the visual world despite continuous movements of our eyes, head and body. Perception of upright is a key aspect of such orientation constancy. Here we investigated whether changes in upright perception during sustained head tilt were related to simultaneous changes in torsional position of the eyes. We used a subjective visual vertical (SVV) task, modified to track changes in upright perception over time, and a custom video method to measure ocular torsion simultaneously. We tested 12 subjects in upright position, during prolonged (~15 min) lateral head tilts of 20 degrees, and also after the head returned to upright position...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27904756/ct-negative-mri-gre-positive-primary-motor-cortex-contusion-causing-isolated-foot-drop
#6
Alexander M Tucker, Tianyi Niu, Daniel T Nagasawa, Richard Everson, Shaina Sedighim, Manuel M Buitrago Blanco
BACKGROUND: Isolated acute foot drop due to traumatic brain injury is exceedingly rare and is often misdiagnosed during initial evaluation. Here, we present the case of a patient who presented with left foot drop after falling off a bicycle. CASE DESCRIPTION: The patient is a 55-year-old male who was mountain biking when he fell, hit his head, and lost consciousness. Neurologic examination of the left leg revealed foot drop, no sensory deficits, and 3+ reflexes at the knee and ankle with clonus...
2016: Surgical Neurology International
https://www.readbyqxmd.com/read/27904632/the-effect-of-reflexology-on-pain-perception-aspects-in-nurses-with-chronic-low-back-pain-in-isfahan
#7
Maryam Eghbali Babadi, Fatemeh Nazari, Reza Safari, Samere Abdoli
BACKGROUND: The most important part in experiencing and recognizing the threshold of pain is the perception of pain. Reflexology is a kind of complementary therapy which is rooted in the beliefs of the community. This study was aimed to determine the effect of reflexology on pain perception aspects in patients with chronic low back pain. MATERIALS AND METHODS: This single-blind clinical trial study was performed on 50 nurses with chronic low back pain, who were selected by convenient sampling and then randomly divided into the case and the control groups...
September 2016: Iranian Journal of Nursing and Midwifery Research
https://www.readbyqxmd.com/read/27904591/brain-regions-involved-in-swallowing-evidence-from-stroke-patients-in-a-cross-sectional-study
#8
Shiva Ebrahimian Dehaghani, Fariba Yadegari, Ali Asgari, Ahmad Chitsaz, Mehdi Karami
BACKGROUND: Limited data available about the mechanisms of dysphagia and areas involving swallow after brain damage; accordingly it is hard to predict which cases are more likely to develop swallowing dysfunction based on the neuroimaging. The aim of this study was to investigate the relationship between brain lesions and dysphagia in a sample of acute conscious stroke patients. MATERIALS AND METHODS: In a cross-sectional study, 113 acute conscious stroke patients (69 male mean [standard deviation (SD)] age 64...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27903641/body-sway-adaptation-to-addition-but-not-withdrawal-of-stabilizing-visual-information-is-delayed-by-a-concurrent-cognitive-task
#9
Jean-Louis Honeine, Oscar Crisafulli, Marco Schieppati
Aim of this study was to test the effects of a concurrent cognitive task on the promptness of the sensorimotor integration and reweighting processes following addition and withdrawal of vision. Fourteen subjects stood in tandem while vision was passively added and removed. Subjects performed a cognitive task, consisting of counting backwards in steps of three, or were 'mentally idle'. We estimated the time interval, following addition and following withdrawal of vision, at which body sway began to change. We also estimated the time constant of the exponential change in body oscillation until the new level of sway was reached, consistent with the current visual state...
November 30, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/27902645/effect-of-nerve-stimulation-use-on-the-success-rate-of-ultrasound-guided-subsartorial-saphenous-nerve-block-a-randomized-controlled-trial
#10
Shaylyn H Montgomery, Colleen M Shamji, Grace S Yi, Cynthia H Yarnold, Stephen J Head, Scott C Bell, Stephan K W Schwarz
BACKGROUND AND OBJECTIVES: Ultrasound-guided subsartorial saphenous nerve block is commonly used to provide complete surgical anesthesia of the foot and ankle in combination with a popliteal sciatic nerve block. However, in part owing to its small caliber and absence of a prominent vascular landmark in the subsartorial plane distal to the adductor canal, the saphenous nerve is more difficult to reliably block than the sciatic nerve in the popliteal fossa. Although the saphenous nerve is a sensory nerve only, neurostimulation can be used to elicit a "tapping" sensation on the anteromedial aspect of the lower leg extending toward the medial malleolus...
November 29, 2016: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/27901398/discriminating-between-neuropathic-pain-and-sensory-hypersensitivity-using-the-chronic-pain-questions-cpq
#11
Karin S Coyne, Brooke M Currie, Sean Donevan, Joseph C Cappelleri, Rozelle Hegeman-Dingle, Lucy Abraham, Christine Thompson, Alesia Sadosky, Marina Brodsky
OBJECTIVE: The Chronic Pain Questions (CPQ) were developed for clinical use with the aim of supporting primary care physicians in the screening, assessment and monitoring of patients with chronic pain. The purpose of this study was to examine the ability of the CPQ to discriminate between patients with neuropathic pain (NeP) versus those with sensory hypersensitivity (SH). METHODS: Adult men and women with a diagnosis of a NeP or SH condition were recruited from 5 clinical sites across the United States...
November 30, 2016: Postgraduate Medicine
https://www.readbyqxmd.com/read/27901334/differential-efficacy-of-methylcobalamin-and-alpha-lipoic-acid-treatment-on-negative-and-positive-symptoms-of-type-2-diabetic-peripheral-neuropathy
#12
Yajuan Han, Min Wang, Jie Shen, Zhen Zhang, Min Zhao, Jing Huang, Youming Chen, Zhi Chen, Yulan Hu, Yubing Wang
BACKGROUND: Diabetic hyperglycemia damages peripheral nerves by triggering ischemia, oxidative stress, and inflammation. Alpha-lipoic acid (ALA) and methylcobalamin (MC) are known to improve signs of diabetic peripheral neuropathy (DPN), possibly by enhancing neural and vascular endothelial cell metabolism and antioxidant capacity. We evaluated differences in efficacy following short-term MC or ALA treatment on DPN symptoms to guide clinical drug selection. METHODS: Forty DPN patients were randomly divided into MC and ALA treatment groups (n=20/20) and assessed by the Toronto Clinical Neuropathy Scoring System (TCSS), total symptom score (TSS), visual analog scale (VAS) of positive symptoms, and easy sensory test (EST) for negative symptoms before and after 2 weeks of treatment...
November 30, 2016: Minerva Endocrinologica
https://www.readbyqxmd.com/read/27900816/sensorimotor-and-visual-perceptual-functioning-in-school-aged-children-with-williams-syndrome
#13
Y-P Wuang, H-Y Tsai
BACKGROUND: The purpose of the study was to describe sensorimotor profile and visual perceptual performance in school-aged (6-12 years) children with Williams syndrome (WS). The impacts of sensorimotor and visual perception on participation in WS were examined as well to guide research and evidence-based practices. METHODS: A total of 38 children with WS aged 6 to 12 years were evaluated with measures of motor performance (Bruininks-Oseretsky of Motor Proficiency-Second Edition), sensory processing (Sensory Profile), visual perceptual abilities (Test of Visual Perception Skills-Third Edition) and activity participation (Vineland Adaptive Behavior Scale, School Function Assessment)...
November 30, 2016: Journal of Intellectual Disability Research: JIDR
https://www.readbyqxmd.com/read/27900145/the-sensitivity-and-specificity-of-clinical-measures-of-sport-concussion-three-tests-are-better-than-one
#14
Jacob E Resch, Cathleen N Brown, Julianne Schmidt, Stephen N Macciocchi, Damond Blueitt, C Munro Cullum, Michael S Ferrara
CONTEXT: A battery of clinical measures of neurocognition, balance and symptoms has been recommended for the management of sport concussion (SC) but is based on variable evidence. OBJECTIVE: To examine the sensitivity and specificity of a battery of tests to assess SC in college athletes. DESIGN: Cross-sectional. SETTING: Research laboratory. PATIENTS OR OTHER PARTICIPANTS: Division 1 athletes diagnosed with a SC (n=40) who were 20...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27899509/sensory-evolution-in-blind-cavefish-is-driven-by-early-embryonic-events-during-gastrulation-and-neurulation
#15
Hélène Hinaux, Lucie Devos, Maryline Blin, Yannick Elipot, Jonathan Bibliowicz, Alexandre Alié, Sylvie Rétaux
Natural variations in sensory systems constitute adaptive responses to the environment. Here, we compared sensory placode development in the blind cave-adapted morph and the eyed river-dwelling morph of Astyanax mexicanus Focusing on the lens and olfactory placodes, we found a trade-off between these two sensory components in the two morphs: from neural plate stage onwards, cavefish have larger olfactory placodes and smaller lens placodes. In a search for developmental mechanisms underlying cavefish sensory evolution, we analyzed the roles of Shh, Fgf8 and Bmp4 signaling, which are known to be fundamental in patterning the vertebrate head and are subtly modulated in space and time during cavefish embryogenesis...
December 1, 2016: Development
https://www.readbyqxmd.com/read/27899280/behavioural-phenotype-of-histamine-h4-receptor-knockout-mice-focus-on-central-neuronal-functions
#16
Maria Domenica Sanna, Carla Ghelardini, Robin L Thurmond, Emanuela Masini, Nicoletta Galeotti
The functional expression of H4 receptors (H4R) within neurons of the central nervous system has been recently reported, but their role is poorly understood. The present study aims to elucidate the role of neuronal H4R by providing the first description of the behavioural phenotype of H4R-deficient (H4R knockout, H4R-KO) mice. Mice lacking H4R underwent behavioural studies to evaluate locomotor activity, pain perception, anxiety, depression, memory and feeding behaviour. H4R-KO mice showed a significant increase in ambulation in an open field as well as in exploratory activity in the absence of any modification of motor coordination...
November 26, 2016: Neuropharmacology
https://www.readbyqxmd.com/read/27898461/cold-pain-threshold-identifies-a-subgroup-of-patients-with-knee-osteoarthritis-that-present-with-multimodality-hyperalgesia-and-elevated-pain-levels
#17
Anthony Wright, Heather A E Benson, Rob Will, Penny Moss
OBJECTIVES: Cold hyperalgesia has been established as an important marker of pain severity in a number of conditions. This study aimed to establish the extent to which patients with knee osteoarthritis (OA) demonstrate widespread cold, heat, and pressure hyperalgesia. OA participants with widespread cold hyperalgesia were compared with the remaining OA cohort to determine whether they could be distinguished in terms of hyperalgesia, pain report, pain quality, and physical function. METHODS: A total of 80 participants with knee OA and 40 matched healthy controls participated...
November 24, 2016: Clinical Journal of Pain
https://www.readbyqxmd.com/read/27898216/characterization-of-prostacyclin-associated-leg-pain-in-patients-with-pulmonary-arterial-hypertension
#18
Gabriel L Pagani-Estévez, Keith M Swetz, Michael D McGoon, Robert P Frantz, Susan K Tointon, Ann M Karnyski, Louise A Durst, James C Watson
RATIONALE: Prostacyclin-associated leg pain is a potentially debilitating adverse effect of prostacyclin therapy for patients with pulmonary arterial hypertension (PAH). However, to our knowledge, this entity has not been systematically studied. OBJECTIVE: To characterize the clinical features and metabolic risk factors for prostacyclinassociated leg pain. METHODS: At one academic medical center we assembled and analyzed a case series of patients with PAH and prostacyclin-associated leg pain...
November 29, 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27897183/sensory-thresholds-at-different-sites-of-the-foot-a-valuable-reference-for-neurologic-examinations
#19
J-W Zhang, Q Wang, X-F Wang, M-M Gao, X-P Yun, H-F Wu, Y Hong
STUDY DESIGN: Prospective healthy volunteer study for sensory thresholds. OBJECTIVES: The aim of this study was to test sensory thresholds at different sites of the foot to provide a reference for diagnosis and neurologic classification. SETTING: A university hospital for the research and clinical practice of rehabilitation. METHODS: Thirty healthy volunteers were recruited, and quantitative sensory testing was performed on three sites of the foot (medial malleolus (for the L4 dermatome), dorsum of the foot at the third metatarsal phalangeal joint (for the L5 dermatome) and lateral heel (for the S1 dermatome))...
November 29, 2016: Spinal Cord
https://www.readbyqxmd.com/read/27896457/the-value-of-quantitative-sensory-testing-in-spine-research
#20
Anja Tschugg, Wolfgang N Löscher, Sara Lener, Sebastian Hartmann, Matthias Wildauer, Sabrina Neururer, Claudius Thomé
The improvement of pain and functionality is the major goal of a surgical intervention. Thus, the purpose of the present prospective study was to evaluate whether subjective sensory deficits in patients with lumbar radiculopathy caused by a lumbar disc herniation are related to clinical status, using several outcome scores and the quantitative sensory testing (QST) pre- and 12 months postoperatively. We applied the QST in 52 patients with a single lumbar disc herniation treated by lumbar sequestrectomy pre- and 12 months postoperatively...
November 28, 2016: Neurosurgical Review
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