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https://www.readbyqxmd.com/read/29146105/content-validation-of-behaviours-and-autonomic-responses-for-the-assessment-of-pain-in-critically-ill-adults-with-a-brain-injury
#1
Céline Gélinas, Kathleen A Puntillo, Madalina Boitor, Mélanie Bérubé, Jane Topolovec-Vranic, Anne-Sylvie Ramelet, Aaron M Joffe, Melissa Richard-Lalonde, Francis Bernard, David L Streiner
BACKGROUND: The evidence shows that brain-injured patients express behaviours that are related to their level of consciousness (LOC), and different from other patients in the intensive care unit (ICU). Therefore, existing behavioural scales should be revised to enhance their content and validity for use in these patients. OBJECTIVES: The aim was to evaluate the content relevance of behaviours and autonomic responses for pain assessment of brain-injured ICU patients from the perspective of critical care clinicians...
November 13, 2017: Australian Critical Care: Official Journal of the Confederation of Australian Critical Care Nurses
https://www.readbyqxmd.com/read/29137908/no-evidence-found-for-an-association-between-prednisone-dose-and-fvc-change-in-newly-treated-pulmonary-sarcoidosis
#2
Caroline E Broos, Linda H C Poell, Caspar W N Looman, Johannes C C M In 't Veen, Marco J J H Grootenboers, Roxane Heller, Leon M van den Toorn, Monique Wapenaar, Henk C Hoogsteden, Mirjam Kool, Marlies S Wijsenbeek, Bernt van den Blink
BACKGROUND: Prednisone is used as first-line therapy for pulmonary sarcoidosis. What dosing strategy has the best balance between effect and side-effects is largely unknown. We analyzed change in forced vital capacity (FVC) and weight during different prednisone doses used in daily practice for treatment naïve pulmonary sarcoidosis patients. METHODS: Multilevel models were used to describe FVC and weight change over time. Correlations were calculated using linear regression models...
October 31, 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/29133149/spontaneous-eye-blink-rate-an-index-of-dopaminergic-component-of-sustained-attention-and-fatigue
#3
Antonio Maffei, Alessandro Angrilli
Blink rate is a behavioral index highly correlated with frontostriatal dopaminergic activity. The present research was aimed at studying the modulation of spontaneous blink rate in function of the increasing attentional load induced by the Mackworth Clock Test. Since blinking interferes with sensory processing, we expected a decreasing blink rate with increasing attentional demand. Three tasks of 7-min each and different difficulties were administered: the Mackworth had a red dot moving in a circle with intervals varying from 500ms, 350ms to 200ms, corresponding to increasing task difficulty...
November 11, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29131578/optically-detected-magnetic-resonance-for-selective-imaging-of-diamond-nanoparticles
#4
Margaret E Robinson, James D Ng, Huilong Zhang, Joseph T Buchman, Olga A Shenderova, Christy L Haynes, Zhenqiang Ma, Randall H Goldsmith, Robert J Hamers
While there is great interest in understanding the fate and transport of nanomaterials in the environment and in biological systems, the detection of nanomaterials in complex matrices by fluorescence methods is complicated by photodegradation, blinking, and by the presence of natural organic material and other fluorescent background signals that hamper detection of fluorescent nanomaterials of interest. Optically detected magnetic resonance (ODMR) of nitrogen-vacancy (NV) centers in diamond nanoparticles provides a pathway toward background-free fluorescence measurements, as the application of a resonant microwave field can selectively modulate the intensity from NV centers in the diamond in nanodiamonds of various diameters in complex materials systems using on-resonance and off-resonance microwave fields...
November 13, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29125299/charge-driven-fluorescence-blinking-in-carbon-nanodots
#5
Syamantak Khan, Weixing Li, Narain Karedla, Jan Thiart, Ingo Gregor, Anna M Chizhik, Joerg Enderlein, Chayan Kanti Nandi, Alexey I Chizhik
This study focuses on the mechanism of fluorescence blinking of single carbon nanodots, which is one of their key but less understood properties. The results of our single particle fluorescence study show that the mechanism of carbon nanodots blinking has remarkable similarities with that of semiconductor quantum dots. In particular, the temporal behavior of carbon nanodot blinking follows a power law both at room and at cryogenic temperatures. Our experimental data suggests that static quenching via Dexter type electron transfer between surface groups of a nanoparticle plays a major role in the transition of carbon nanodots to off- or grey states, whereas the transition back to on-states is governed by an electron tunneling from the particle's core...
November 10, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29124438/reorganization-of-sensory-input-at-brainstem-in-hemifacial-spasm-and-postparalytic-facial-syndrome
#6
Meral E Kızıltan, Ayşegul Gunduz
We hypothesized the filtering of sensory input from face and hand at brainstem may reorganize in hemifacial spasm (HFS) and postparalytic facial syndrome (PFS). Thus, we examined the prepulse inhibition of blink reflex (BR-PPI) in HFS and PFS. We included 12 healthy subjects, 13 patients with HFS, and 11 patients with PFS. Baseline BR, BR recovery at interstimulus interval (ISI) of 300 ms and BR-PPI at ISI of 100 ms were performed on the right sides of healthy subjects and on both sides of patients. Within-subject analysis showed baseline BR and BR-PPI were similar between asymptomatic and symptomatic sides of patients with HFS whereas BR recovery was higher on the symptomatic side...
November 9, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/29120129/the-role-of-electromyographic-blink-reflex-in-the-evaluation-of-headache-incidence
#7
Marijan Cesarik, Iris Zavoreo, Lucija Zadro-Matovina, Tomislav Madžar, Vanja Bašić Kes
Migraine and tension type headache are the most common disabling primary headache disorders. Epidemiological studies have documented their high prevalence and high socioeconomic and personal impacts. According to recent data, migraine ranks as the third most prevalent disorder and seventh-highest specific cause of disability worldwide. Tension-type headache has lifetime prevalence in the general population ranging between 30% and 78% in different studies. According to the International Classification of Headache Disorders, 3rd edition, there also are many other headaches but their incidence in general population is lower than the previously mentioned headaches...
March 2017: Acta Clinica Croatica
https://www.readbyqxmd.com/read/29116963/an-objective-method-to-determine-the-electrically-evoked-stapedius-reflex-threshold-during-cochlea-implantation
#8
Bernhard G Weiss, Friederike Söchting, Mattis Bertlich, Martin Busch, Jenny Blum, Friedrich Ihler, Martin Canis
OBJECTIVE: In cochlea implantation, assessment of the electrically evoked stapedius reflex threshold (eSRT) provides information for postoperative adjustment of the speech processor. This is used to prevent undesired overstimulation. To this day, the reflex is visually identified by the surgeon. However, this method may be prone to error due to ventilation-associated situs excursions, blinking, or other distractions. Therefore, the aim of this study was to establish an objective and automatized method to determine the eSRT...
November 7, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29111642/a-stretchable-and-transparent-nanocomposite-nanogenerator-for-self-powered-physiological-monitoring
#9
Xiaoliang Chen, Kaushik Parida, Jiangxin Wang, Jiaqing Xiong, Meng-Fang Lin, Jinyou Shao, Pooi-See Lee
Smart sensing electronic device with good transparency, high stretchability and self-powered sensing characteristics are essential in wearable health monitoring systems. This paper innovatively proposes a stretchable nanocomposite nanogenerator with good transparency that can be conformally attached on human body to harvest biomechanical energy and monitor physiological signals. The work reports an innovative device that uses sprayed silver nanowires as transparent electrodes and sandwiches a nanocomposite of piezoelectric BaTiO3 and PDMS as the sensing layer, which exhibits good transparency and mechanical transformability with stretchable, foldable, and twistable properties...
November 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29110603/characterization-of-polyethersulfone-membranes-for-tear-fluid-collection
#10
Q Yang, X Liu, Z Song, L Lin, K Wu
This study evaluated the utility of polyethersulfone membranes (PESms) for tear collection and compared it with two frequently employed approaches: the use of Schirmer test paper (STP) and capillary tube (CaT). STP and PESms of 0.45 and 0.65 μm (PESm65) were examined using scanning electron microscopy (SEM), applied to soak up water and cellular lysates, and employed to collect tear fluid (TF) from rabbits. The proteins in the cellular lysates and TF were characterized through band profiling of SDS-polyacrylamide electrophoresis (PAGE) gels and Western blot analyzing...
November 1, 2017: Current Molecular Medicine
https://www.readbyqxmd.com/read/29109907/a-temporal-white-noise-analysis-for-extracting-the-impulse-response-function-of-the-human-electroretinogram
#11
Andrew J Zele, Beatrix Feigl, Pradeep K Kambhampati, Avinash Aher, Declan McKeefry, Neil Parry, John Maguire, Ian Murray, Jan Kremers
Purpose: We introduce a method for determining the impulse response function (IRF) of the ERG derived from responses to temporal white noise (TWN) stimuli. Methods: This white noise ERG (wnERG) was recorded in participants with normal trichromatic vision to full-field (Ganzfeld) and 39.3° diameter focal stimuli at mesopic and photopic mean luminances and at different TWN contrasts. The IRF was obtained by cross-correlating the TWN stimulus with the wnERG. Results: We show that wnERG recordings are highly repeatable, with good signal-to-noise ratio, and do not lead to blink artifacts...
November 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/29108915/corrigendum-to-neurobiological-correlates-of-impulsivity-in-healthy-adults-lower-prefrontal-gray-matter-volume-and-spontaneous-eye-blink-rate-but-greater-resting-state-functional-connectivity-in-basal-ganglia-thalamo-cortical-circuitry-neuroimage-157-2017-288
#12
Cole Korponay, Daniela Dentico, Tammi R A Kral, Martina Ly, Ayla Kruis, Robin Goldman, Antoine Lutz, Richard J Davidson
No abstract text is available yet for this article.
November 3, 2017: NeuroImage
https://www.readbyqxmd.com/read/29105204/emotional-reactivity-and-appraisal-of-food-in-relation-to-eating-disorder-cognitions-and-behaviours-evidence-to-support-the-motivational-conflict-hypothesis
#13
Sarah E Racine, Karen R Hebert, Stephen D Benning
Eating disorders are associated with both negative and positive emotional reactions towards food. Individual eating disorder symptoms may relate to distinct emotional responses to food, which could necessitate tailored treatments based on symptom presentation. We examined associations between eating disorder symptoms and psychophysiological responses to food versus neutral images in 87 college students [mean (SD) age = 19.70 (2.09); mean (SD) body mass index = 23.25(2.77)]. Reflexive and facial electromyography measures tapping negative emotional reactivity (startle blink reflex) and appraisal (corrugator muscle response) as well as positive emotional reactivity (postauricular reflex) and appraisal (zygomaticus muscle response) were collected...
November 3, 2017: European Eating Disorders Review: the Journal of the Eating Disorders Association
https://www.readbyqxmd.com/read/29104557/high-fidelity-visual-long-term-memory-within-an-unattended-blink-of-an-eye
#14
Christof Kuhbandner, Elizabeth A Rosas-Corona, Philipp Spachtholz
What is stored in long-term memory from current sensations is a question that has attracted considerable interest. Over time, several prominent theories have consistently proposed that only attended sensory information leaves a durable memory trace whereas unattended information is not stored beyond the current moment, an assumption that seems to be supported by abundant empirical evidence. Here we show, by using a more sensitive memory test than in previous studies, that this is actually not true. Observers viewed a rapid stream of real-world object pictures overlapped by words (presentation duration per stimulus: 500 ms, interstimulus interval: 200 ms), with the instruction to attend to the words and detect word repetitions, without knowing that their memory would be tested later...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29102759/preclinical-profile-of-a-dopamine-d1-potentiator-suggests-therapeutic-utility-in-neurological-and-psychiatric-disorders
#15
Robert F Bruns, Stephen N Mitchell, Keith A Wafford, Alex J Harper, Elaine A Shanks, Guy Carter, Michael J O'Neill, Tracey K Murray, Brian J Eastwood, John M Schaus, James P Beck, Junliang Hao, Jeffrey M Witkin, Xia Li, Eyassu Chernet, Jason S Katner, Hong Wang, John W Ryder, Meghane E Masquelin, Linda K Thompson, Patrick L Love, Deanna L Maren, Julie F Falcone, Michelle M Menezes, Linli Zhang, Charles R Yang, Kjell A Svensson
DETQ, an allosteric potentiator of the dopamine D1 receptor, was tested in therapeutic models that were known to respond to D1 agonists. Because of a species difference in affinity for DETQ, all rodent experiments used transgenic mice expressing the human D1 receptor (hD1 mice). When given alone, DETQ reversed the locomotor depression caused by a low dose of reserpine. DETQ also acted synergistically with L-DOPA to reverse the strong hypokinesia seen with a higher dose of reserpine. These results indicate potential as both monotherapy and adjunct treatment in Parkinson's disease...
October 26, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29100736/single-neuron-correlates-of-awareness-during-attentional-blinks
#16
Zhongzheng Fu, Ueli Rutishauser
A recent single-neuron study revealed an anatomical anterior-to-posterior gradient of awareness-related responses by 'concept neurons' in the human medial temporal lobe (MTL). Delayed and weaker responses were indicative of the failure of a stimulus to reach awareness, suggesting that reliable fast responses are a critical aspect of the neural mechanisms of consciousness.
October 31, 2017: Trends in Cognitive Sciences
https://www.readbyqxmd.com/read/29100627/locus-coeruleus-activity-mediates-hyperresponsiveness-in-posttraumatic-stress-disorder
#17
Christoph Naegeli, Thomas Zeffiro, Marco Piccirelli, Assia Jaillard, Anina Weilenmann, Katayun Hassanpour, Matthis Schick, Michael Rufer, Scott P Orr, Christoph Mueller-Pfeiffer
BACKGROUND: Patients with posttraumatic stress disorder (PTSD) are hyperresponsive to unexpected or potentially threatening environmental stimuli. Research in lower animals and humans suggests that sensitization of the locus coeruleus-norepinephrine system may underlie behavioral and autonomic hyperresponsiveness in PTSD. However, direct evidence linking locus coeruleus system hyperactivity to PTSD hyperresponsiveness is sparse. METHODS: Psychophysiological recording and functional magnetic resonance imaging were used during passive listening to brief, 95-dB sound pressure level, white noise bursts presented intermittently to determine whether behavioral and autonomic hyperresponsiveness to sudden sounds in PTSD is associated with locus coeruleus hyperresponsiveness...
September 7, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29099588/flexible-and-transparent-strain-sensors-with-embedded-multiwalled-carbon-nanotubes-meshes
#18
Bangbang Nie, Xiangming Li, Jinyou Shao, Xin Li, Hongmiao Tian, Duorui Wang, Qiang Zhang, Bingheng Lu
Strain sensors combining high sensitivity with good transparency and flexibility would be of great usefulness in smart wearable/flexible electronics. However, the fabrication of such strain sensors is still challenging. In this study, new strain sensors with embedded multiwalled carbon nanotubes (MWCNTs) meshes in polydimethylsiloxane (PDMS) films were designed and tested. The strain sensors showed elevated optical transparency of up to 87% and high sensitivity with a gauge factor of 1140 at a small strain of 8...
November 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29095724/evaluation-of-the-effect-of-moist-chamber-spectacles-in-patients-with-dry-eye-exposed-to-adverse-environment-conditions
#19
Mamoru Ogawa, Murat Dogru, Naoki Toriyama, Takefumi Yamaguchi, Jun Shimazaki, Kazuo Tsubota
PURPOSE: To evaluate the effect of moist chamber spectacle wear on the ocular surface and tear functions in a controlled wind exposure environment. METHODS: Twenty-eight eyes of 14 probable dry eye subjects (4 men, 10 women; mean age: 34.5 years) underwent constant wind exposure for 10 min without spectacle, with conventional spectacle wear, and with moist chamber spectacle wear. Dryness Visual Analog Scale (VAS) scores, tear evaporation, blink rate, tear film breakup testing, and fluorescein staining were performed before and after wind exposure...
October 31, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/29094943/ideal-cdse-cds-core-shell-nanocrystals-enabled-by-entropic-ligands-and-their-core-size-shell-thickness-and-ligand-dependent-photoluminescence-properties
#20
Jianhai Zhou, Meiyi Zhu, Renyang Meng, Haiyan Qin, Xiaogang Peng
This work explored possibilities to obtain colloidal quantum dots (QDs) with ideal photoluminescence (PL) properties, i.e., monoexponential PL decay dynamics, unity PL quantum yield, ensemble PL spectrum identical to that at the single-dot level, single-dot PL nonblinking, and antibleaching. Using CdSe/CdS core/shell QDs as the model system, shell-epitaxy, ligand exchange, and shape conversion of the core/shell QDs were studied systematically to establish a strategy for reproducibly synthesizing QDs with the targeted properties...
November 13, 2017: Journal of the American Chemical Society
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