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https://www.readbyqxmd.com/read/27911815/nicotinic-receptors-in-mouse-prefrontal-cortex-modulate-ultraslow-fluctuations-related-to-conscious-processing
#1
Fani Koukouli, Marie Rooy, Jean-Pierre Changeux, Uwe Maskos
The prefrontal cortex (PFC) plays an important role in cognitive processes, including access to consciousness. The PFC receives significant cholinergic innervation and nicotinic acetylcholine receptors (nAChRs) contribute greatly to the effects of acetylcholine signaling. Using in vivo two-photon imaging of both awake and anesthetized mice, we recorded spontaneous, ongoing neuronal activity in layer II/III in the PFC of WT mice and mice deleted for different nAChR subunits. As in humans, this activity is characterized by synchronous ultraslow fluctuations and neuronal synchronicity is disrupted by light general anesthesia...
December 2, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27911071/severe-brain-injury-in-massachusetts-assessing-the-continuum-of-care
#2
Laura Lorenz, Gabrielle Katz
Acquired brain injury (ABI) is a major public health problem in Massachusetts (Hackman et al, 2014) and includes traumatic brain injury (TBI), stroke, ABI-related infectious diseases, metabolic disorders affecting the central nervous system (brain and spinal cord), and brain tumor. Advances in emergency medical care and neurosurgery mean that more people are surviving severe traumatic brain injury (Trexler et al, 2014). Yet many patients with severe TBI in particular, are not receiving inpatient services after initial treatment (Hackman et al, 2014; CDC, 2014) or later that are known to be effective (Malec & Kean, 2015; Lewis & Horn, 2015; BI Commission, 2011; Kolakowsky-Hayner et al, 2000; Interviews)...
December 10, 2015: Issue Brief
https://www.readbyqxmd.com/read/27910995/a-diffusion-tensor-magnetic-resonance-imaging-study-of-paediatric-patients-with-severe-non-traumatic-brain-injury
#3
Erika Molteni, Maria A Rocca, Sandra Strazzer, Elisabetta Pagani, Katia Colombo, Filippo Arrigoni, Giacomo Boffa, Massimiliano Copetti, Valentina Pastore, Massimo Filippi
AIM: In this observational study using 3T magnetic resonance imaging (MRI) and diffusion tensor, we investigated the differential effects of pathology, stage of disease, state of consciousness, and aetiology on the modifications of supra- and infra-tentorial white matter tracts and their correlations with clinical scales in paediatric patients with severe non-traumatic brain injury. METHOD: Diffusion tensor magnetic resonance imaging (DT-MRI) was obtained from seven children with unresponsive wakefulness syndrome (UWS; five males, two females; age at event 5y; standard deviation [SD] 2y 1mo), six children in a minimally conscious state (MCS; three males, three females; age at event 5y 10mo; SD 5y), and 10 healthy children as controls(two males, eight females; age at study 10y 10mo; SD 2y 10mo)...
December 2, 2016: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/27909594/knowledge-of-the-research-assistants-regarding-local-anaesthetics-and-toxicity
#4
Derya Karasu, Canan Yılmaz, Şeyda Efsun Özgünay, Mürüvvet Dayıoğlu, Çağdaş Baytar, Gülsen Korfalı
OBJECTIVE: Cardiovascular system depression, respiratory arrest, coma, convulsions, loss of consciousness, muscle twitching, blurred vision, vertigo, dizziness and numbness of the tongue can be seen in local anaesthetic toxicity. Treatment includes 20% lipid solutions, airway control, symptomatic treatment for arrhythmia and convulsions. The aim of this study is to present the knowledge of research assistants, who used local anaesthetics in daily practice, regarding these medications and toxicity treatment and to raise awareness...
August 2016: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/27909469/value-of-the-wearable-cardioverter-defibrillator-wcd-as-a-bridging-therapy-before-implantation-of-a-cardioverter-defibrillator-icd
#5
REVIEW
Priv- Doz, Dr Johannes Sperzel
Wearable cardioverter defibrillators (WCD), initially available in 2002, have recently experienced more routine use in many institutions as a means of preventing sudden cardiac death (SCD) prior to implantable cardioverter defibrillator (ICD) evaluation or implantation. WCD differ from ICD by their noninvasive nature, making them well suited for patient populations who have a chance for significant cardiac recovery (such as after an acute myocardial infarction). Despite their noninvasive nature, WCD treatment of sustained ventricular tachyarrhythmias is highly successful...
February 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27909401/implicit-learning-in-transient-global-amnesia-and-the-role-of-stress
#6
Frauke Nees, Martin Griebe, Anne Ebert, Michaela Ruttorf, Benjamin Gerber, Oliver T Wolf, Lothar R Schad, Achim Gass, Kristina Szabo
Transient global amnesia (TGA) is a disorder with reversible anterograde disturbance of explicit memory, frequently preceded by an emotionally or physically stressful event. By using magnetic resonance imaging (MRI) following an episode of TGA, small hippocampal lesions have been observed. Hence it has been postulated that the disorder is caused by the stress-related transient inhibition of memory formation in the hippocampus. In experimental studies, stress has been shown to affect both explicit and implicit learning-the latter defined as learning and memory processes that lack conscious awareness of the information acquired...
2016: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/27909252/nurses-as-antibiotic-brokers-institutionalized-praxis-in-the-hospital
#7
Alex Broom, Jennifer Broom, Emma Kirby, Graham Scambler
We are likely moving rapidly toward a post-antibiotic era, as a result of escalating antimicrobial resistance, rapidly declining antibiotic production and profligate overuse. Hitherto research has almost exclusively focused on doctors' prescribing, with nurses' roles in antibiotic use remaining virtually invisible. Drawing on interviews with 30 nurses, we focus on nurses as brokers of doctors' antibiotic decisions, nursing capacity to challenge doctors' decisions, and, "back stage" strategies for circumnavigating organizational constraints...
November 30, 2016: Qualitative Health Research
https://www.readbyqxmd.com/read/27906747/update-on-angiotensin-at2-receptors
#8
Robert M Carey
PURPOSE OF REVIEW: This review updates major new findings and concepts introduced during the past year on the role of angiotensin II (Ang II) subtype 2 receptors (AT2Rs) in the control of blood pressure and renal function. RECENT FINDINGS: AT2R activation prevents sodium (Na) retention and lowers blood pressure in the Ang II infusion model of experimental hypertension and prevents salt-sensitive hypertension in the obese Zucker rat model of obesity and the metabolic syndrome...
November 30, 2016: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/27906663/value-of-patient-reported-symptoms-in-the-diagnosis-of-transient-loss-of-consciousness
#9
(no author information available yet)
No abstract text is available yet for this article.
November 15, 2016: Neurology
https://www.readbyqxmd.com/read/27905080/a-neural-model-of-normal-and-abnormal-learning-and-memory-consolidation-adaptively-timed-conditioning-hippocampus-amnesia-neurotrophins-and-consciousness
#10
Daniel J Franklin, Stephen Grossberg
How do the hippocampus and amygdala interact with thalamocortical systems to regulate cognitive and cognitive-emotional learning? Why do lesions of thalamus, amygdala, hippocampus, and cortex have differential effects depending on the phase of learning when they occur? In particular, why is the hippocampus typically needed for trace conditioning, but not delay conditioning, and what do the exceptions reveal? Why do amygdala lesions made before or immediately after training decelerate conditioning while those made later do not? Why do thalamic or sensory cortical lesions degrade trace conditioning more than delay conditioning? Why do hippocampal lesions during trace conditioning experiments degrade recent but not temporally remote learning? Why do orbitofrontal cortical lesions degrade temporally remote but not recent or post-lesion learning? How is temporally graded amnesia caused by ablation of prefrontal cortex after memory consolidation? How are attention and consciousness linked during conditioning? How do neurotrophins, notably brain-derived neurotrophic factor (BDNF), influence memory formation and consolidation? Is there a common output path for learned performance? A neural model proposes a unified answer to these questions that overcome problems of alternative memory models...
November 30, 2016: Cognitive, Affective & Behavioral Neuroscience
https://www.readbyqxmd.com/read/27904759/a-review-of-sub-acute-subdural-hematoma-sasdh-with-our-institutional-experience-and-its-management-by-double-barrel-technique-dbt-a-novel-technique
#11
Soubhagya R Tripathy, Pankaj K Swarnakar, Sanjib Mishra, Sudhanshu S Mishra, Manmath K Dhir, Sanjay K Behera, Pratap C Nath, Somnath P Jena, Itibrata Mohanta, Deepak Das, Mani C Satapathy, Sitansu K Rout, Bikash R Behera, Deepak K Parida, Tanushree S Rath
BACKGROUND: Subacute subdural hematoma (SASDH) is an entity which is yet to capture the popular imagination among the neurosurgeons. Its management is often equated clinically to that of the chronic subdural hematoma (CSDH). However, their neurological deterioration is usually rapid, which seems to align them with acute subdural hematoma (ASDH). We proceed for their epidemiological evaluation. The advantages of a novel "double barrel technique (DbT)" over the conventional burrhole drainage are also presented...
2016: Surgical Neurology International
https://www.readbyqxmd.com/read/27904756/ct-negative-mri-gre-positive-primary-motor-cortex-contusion-causing-isolated-foot-drop
#12
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/27904755/paraplegia-caused-by-cerebral-contusions-in-the-bilateral-precentral-gyri
#13
Hideaki Matsumura, Hiroyuki Fujimori, Naoaki Sato, Akira Matsumura
BACKGROUND: Paraplegia is mainly caused by spinal cord disease and rarely occurs due to head trauma. In this report, we describe a case of paraplegia caused by cerebral contusions in the bilateral precentral gyri. CASE DESCRIPTION: A 72-year-old man was admitted to our hospital with mildly impaired consciousness and severe pure motor paralysis in both legs. He was healthy until the morning of the day, but his wife found him injured in front of his house upon returning home...
2016: Surgical Neurology International
https://www.readbyqxmd.com/read/27904591/brain-regions-involved-in-swallowing-evidence-from-stroke-patients-in-a-cross-sectional-study
#14
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/27903341/-the-application-of-conscious-sedation-with-a-small-dose-of-dexmedetomidine-and-sufentanil-in-elderly-patients-undergoing-multiple-intestinal-polyps-resection
#15
C M Shi, Y D Zhou, M Xu, X D Wang, L M Meng, X J Liu, X Y Guo
Objective: To explore the effectiveness and feasibility of conscious sedation with a low dose of dexmedetomidine and sufentanil during multiple intestinal polyps resection in elderly patients. Methods: Sixty elderly patients who underwent multiple intestinal polyps resection in Peking University Third Hospital from Janurary to May 2016 were randomly divided into dexmedetomidine group (D group, n=30) and propofol group (P group, n=30). There were 28 males and 32 females with a mean age of (70.4±4.5) years old (range: 65-80 years old)...
November 22, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27902888/gender-conformity-self-objectification-and-body-image-for-sorority-and-nonsorority-women-a-closer-look
#16
David Francis Adams, Erica Behrens, Lianne Gann, Eva Schoen
: Sororities have been identified as placing young women at risk for body image concerns due to a focus on traditional gender role norms and objectification of women. OBJECTIVE: This study assessed the relationship between conformity to feminine gender role norms, self-objectification, and body image surveillance among undergraduate women. PARTICIPANTS: In a random sample of undergraduates, the authors examined data from sorority and nonsorority women...
November 30, 2016: Journal of American College Health: J of ACH
https://www.readbyqxmd.com/read/27902828/spontaneous-eyeblinks-during-breaking-continuous-flash-suppression-are-associated-with-increased-detection-times
#17
Filip Van Opstal, Esther De Loof, Tom Verguts, Axel Cleeremans
An eyeblink has a clear effect on low-level information processing because it temporarily occludes all visual information. Recent evidence suggests that eyeblinks can also modulate higher level processes (e.g., attentional resources), and vice versa. Despite these putative effects on different levels of information processing, eyeblinks are typically neglected in vision and in consciousness research. The main aim of this study was to investigate the timing and the effect of eyeblinks in an increasingly popular paradigm in consciousness research, namely breaking continuous flash suppression (b-CFS)...
November 1, 2016: Journal of Vision
https://www.readbyqxmd.com/read/27902676/dural-sinus-cerebral-venous-thrombosis-in-a-pediatric-trauma-patient-a-rare-complication-after-closed-head-injury
#18
Jonathan Wilcher, Michelle Pannell
OBJECTIVE: Closed head injury rarely predisposes patients, particularly children, to the development of dural sinus thrombosis. In addition, most cases of sinus thrombosis are subacute in nature. The following is a case report of a precipitous course of dural sinus thrombosis after closed head injury in a pediatric trauma patient. DESCRIPTION: A 14-year-old African American girl presented to the emergency department as a trauma activation. She was an unrestrained rear-seat passenger involved in a motor vehicle collision during which she was ejected...
December 2016: Pediatric Emergency Care
https://www.readbyqxmd.com/read/27900920/-sudden-loss-of-consciousness-during-labour
#19
L T van Genugten, L P Morssink, E L van der Kooi
This case describes a 36-year-old woman, gravida 4 para 2 at 41 weeks and 3 days gestation, who appeared unconscious during labour for 75 minutes. After excluding physical disorders, it transpired that she was having a conversion disorder. A patient with a decreased level of consciousness in childbirth must be assessed using the ABCDE method, positioned in left lateral tilt to prevent inferior vena cava compression. After stabilization of the vital functions and establishing the patient's history, physical examination and laboratory tests are components of the initial clinical assessment...
2016: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/27900401/vaginal-wall-weakness-in-parous-ewes-a-potential-preclinical-model-of-pelvic-organ-prolapse
#20
Natharnia Young, Anna Rosamilia, John Arkwright, Joseph Lee, Miranda Davies-Tuck, Joan Melendez, Jerome Werkmeister, Caroline E Gargett
INTRODUCTION AND HYPOTHESIS: Ewes develop pelvic organ prolapse (POP) and may be a suitable model for preclinical studies evaluating cell-based therapies for POP. The aim of this study was to establish a clinical score of vaginal weakness and to compare POP Quantification System (POP-Q) values in conscious nulliparous and parous ewes and determine whether ewes are a suitable POP model. METHODS: Ewes (n = 114) were examined while conscious, without sedation, and standing in a V conveyer by adapting the human POP-Q measurement...
November 29, 2016: International Urogynecology Journal
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