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Loss of consciousness

Temitayo Oyefunmike Oyegbile, Bronson Elizabeth Delasobera, Nassim Zecavati
The objective was to characterize cognitive deficits and postconcussive symptoms in a pediatric population with no concussion, a single concussion, and ≥2 concussions, using a cross-sectional design. Cognitive function and postconcussive symptoms were assessed in participants (age 10-20) with no concussion (n = 1118), single concussion (n = 368), and repeated (≥2) concussions (n = 252). Analyses were adjusted for age and gender. Individuals with ≥2 concussions exhibited more total postconcussive symptoms; more loss of consciousness, amnesia and confusion; more headaches; and poorer cognitive function compared to no concussion and single concussion...
January 1, 2018: Journal of Child Neurology
Sharon Shmuely, Prisca R Bauer, Erik W van Zwet, J Gert van Dijk, Roland D Thijs
OBJECTIVE: We assessed motor phenomena in syncope and convulsive seizures to aid differential diagnosis and understand the pathophysiologic correlates. METHODS: We studied video-EEG recordings of tilt-induced syncope and convulsive seizures in participants aged 15 years and older. Syncope was defined as (1) loss of consciousness (video-assessed), (2) circulatory changes (accelerating blood pressure decrease with or without bradycardia/asystole), and (3) EEG changes ("slow" or "slow-flat-slow")...
March 16, 2018: Neurology
Nikki Kells, Ngaio Beausoleil, Craig Johnson, Mhairi Sutherland
The aim of this research was to evaluate the welfare of pre-weaned piglets euthanised using three different gas treatments: 100% carbon dioxide (CO₂), 100% argon (Ar) or a mixture of 60% Ar/40% carbon dioxide (Ar/CO₂). Two studies (n = 5 piglets/treatment/study) were conducted: (1) behavioural and physiological data were collected from conscious piglets during exposure to test gases via immersion in a pre-filled chamber and (2) electrophysiological data were collected from lightly anaesthetised, intubated and mechanically ventilated piglets exposed to the same test gases...
March 16, 2018: Animals: An Open Access Journal From MDPI
Ali S Haider, Christopher S Graffeo, Avital Perry, Lucas P Carlstrom, Terry C Burns
Insular gliomas were previously considered inoperable lesions and were typically treated via biopsy, chemotherapy and/or radiation, if not observation alone. Stereotactic biopsies of low grade insular gliomas can underestimate tumor grade or fail to establish malignancy. Moreover, the survival advantages of maximal safe resection for insular lesions are increasingly being recognized. As such, early surgical resection is increasingly being performed. As with most lesions, a differential diagnosis exists for apparent insular gliomas, with definitive diagnosis generally obtained upon resection...
January 11, 2018: Curēus
Edward H Reynolds
The word hysteria originated in the Corpus Hippocraticum (c420 BCE) as a natural explanation for a variety of diseases in women linked in the Greco-Roman mind to an animate or inanimate womb, but which in the last five centuries has evolved to describe an elusive disorder of brain ± mind in men and women, currently referred to by neurologists as "functional neurological disorder". The Babylonians, Assyrians and Egyptians had no knowledge of brain or psychological function. Babylonian and Assyrian descriptions of disease and behaviour include only rare examples suggestive of modern hysteria...
February 17, 2018: Journal of the Neurological Sciences
Hanna M Butler-Struben, Samantha M Brophy, Nasira A Johnson, Robyn J Crook
Cephalopod molluscs are among the most behaviorally and neurologically complex invertebrates. As they are now included in research animal welfare regulations in many countries, humane and effective anesthesia is required during invasive procedures. However, currently there is no evidence that agents believed to act as anesthetics produce effects beyond immobility. In this study we demonstrate, for the first time, that two of the most commonly used agents in cephalopod general anesthesia, magnesium chloride and ethanol, are capable of producing strong and reversible blockade of afferent and efferent neural signal; thus they are genuine anesthetics, rather than simply sedating agents that render animals immobile but not insensible...
2018: Frontiers in Physiology
John C Tuthill, Eiman Azim
Although familiar to each of us, the sensation of inhabiting a body is ineffable. Traditional senses like vision and hearing monitor the external environment, allowing humans to have shared sensory experiences. But proprioception, the sensation of body position and movement, is fundamentally personal and typically absent from conscious perception. Nonetheless, this 'sixth sense' remains critical to human experience, a fact that is most apparent when one considers those who have lost it. Take, for example, the case of Ian Waterman who, at the age of 19, suffered a rare autoimmune response to a flu infection that attacked the sensory neurons from his neck down...
March 5, 2018: Current Biology: CB
Caterina Mosti, Emil F Coccaro
Mild traumatic brain injury (mTBI) is highly prevalent, with an estimated occurrence in the United States of more than 1.3 million per year. While one consequence of mTBI is impulsive aggressive behavior, very few studies have examined the relationship between history of mTBI and aggressive behavior in impulsively aggressive individuals. The authors examined the relationship between history of mTBI in a healthy control group (HC; N=453), a control group with psychiatric disorders (PC; N=486), and individuals with intermittent explosive disorder (IED; N=695), a disorder of primary impulsive aggression...
March 5, 2018: Journal of Neuropsychiatry and Clinical Neurosciences
Mitra Rahimi, Somaieh Lookzadeh, Roxana Sadeghi, Kambiz Soltaninejad, Shahin Shadnia, Abdolkarim Pajoumand, Hossein Hassanian-Moghaddam, Nasim Zamani, Masoud Latifi-Pour
Introduction: Amphetamine type stimulants (ATS) such as amphetamine and methamphetamine (MA) are one of the most important causes of poisoning in the world. In this study we aimed to define the predictive factors of mortality in acute ATS poisoning patients. Methods: This is a retrospective cross-sectional study on all cases with acute ATS poisoning who were referred to a referral center for poisoning, Tehran, Iran, from April 2011 to March 2014. Using patients' medical records, demographic data, route of exposure, type and amount of ATS, the cause of poisoning, clinical presentations, and electrocardiogram (ECG) and laboratory findings, as well as patient's outcomes were collected and analyzed regarding the independent predictive factors of mortality...
2018: Emergency (Tehran, Iran)
Hyung-Joo Lee, Youn-Jung Kim, Dong-Woo Seo, Chang Hwan Sohn, Seung Mok Ryoo, Shin Ahn, Yoon-Seon Lee, Won Young Kim, Kyoung Soo Lim
OBJECTIVE: The detection of intracranial injury in patients with facial injury rather than traumatic brain injury (TBI) remains a challenge for emergency physicians. This study aimed to evaluate the incidence and risk factors of intracranial injury in patients with orbital wall fracture (OWF), who were classified with a chief complaint of facial injury rather than TBI. METHODS: This retrospective case-control study enrolled adult OWF patients (age ≥18 years) who presented at the hospital between January 2004 and March 2016...
February 24, 2018: Injury
Gillian Loomes
The right to active participation by disabled people in academic research has been discussed at length in recent years, along with the potential for such research to function as a tool in challenging oppression and pursuing disability rights. Significant ethical, legal and methodological dilemmas arise, however, in circumstances where a disabled person loses the capacity to provide informed consent to such participation. In this article, I consider disability politics and academic research in the context of the Mental Capacity Act (MCA) 2005, which sets out in Anglo-Welsh law the circumstances and requirements for research participation by individuals lacking the capacity to provide informed consent...
March 3, 2018: Journal of Medical Ethics
Zhu-Wei Zhang, Dong-Ping Zhang, Hai-Ying Li, Zhong Wang, Gang Chen
Stroke that is caused by poor blood flow into the brain results in cell death, including ischemia stroke due to lack of blood into brain tissue, and hemorrhage due to bleeding. Both of them will give rise to the dysfunction of brain. In general, the signs and symptoms of stroke are the inability of feeling or moving on one side of body, sometimes loss of vision to one side. Above symptoms will appear soon after the stroke has happened. If the symptoms and signs happen in 1 or 2 hours, we often call them as transient ischemic attack...
October 2017: Medical Gas Research
Leonardo Palacios-Sánchez, Juan Sebastián Botero-Meneses, Rocío Plazas Pachón, Laura Bibiana Pineros Hernández, Juanita Del Pilar Triana-Melo, Santiago Ramírez-Rodríguez
It could be argued that one of the few unifying qualities all human beings share is the ability to appreciate beauty. While the object of beauty may change from one person to another, the awe and the thrill experienced by an enthralled beholder remains the same. Sometimes, this experience can be so overwhelming it can bring someone to the edge of existence. A very rare condition, known as aesthetic syndrome and, more commonly, Stendhal syndrome, entails a clinical phenomenon in which the presence of a beautiful piece of work or architecture causes dysautonomic symptoms such as tachycardia, diaphoresis, chest pains and loss of consciousness...
February 2018: Arquivos de Neuro-psiquiatria
Tinsae Alemayehu, Wondwossen Ergete, Workeabeba Abebe
Background: Pediatric nervous system tuberculomas are usually infra-tentorial and multiple. A frontal lobe location is rare. Case Details: We report a 10 year-old boy who presented with a chronic headache and episodes of loss of consciousness. He had no signs of primary pulmonary tuberculosis and a diagnosis of frontal tuberculoma was made upon a post-operative biopsy. He improved following treatment with anti-tubercular drugs. Conclusion: Tuberculosis should be considered in children with a chronic headache or focal neurologic deficit and a supra-tentorial intracranial mass in endemic countries like Ethiopia...
November 2017: Ethiopian Journal of Health Sciences
Adam C Raikes, Sydney Y Schaefer, Breanna E Studenka
OBJECTIVES: Long-term monitoring of concussion recovery requires time- and cost-effective methods. Physiologic complexity may be useful in evaluating visual-motor integration following concussion. The purpose of this study was to quantify the extent to which prior number of concussions influenced visual-motor tracking force complexity. METHODS: Thirty-five individuals with a self-reported concussion history (age: 20.92 ± 1.98) and 15 without (age: 20.92 ± 2...
February 27, 2018: Brain Injury: [BI]
Kathleen E Walsh, Trisha Baneck, Richard L Page, Michele Brignole, Mohamed H Hamdan
BACKGROUND: Psychogenic pseudo-syncope (PPS) frequently mimics syncope. The aim of this study was to assess the prevalence and clinical features of PPS and its relationship to vasovagal syncope (VVS). METHODS: We examined retrospectively the medical records of 1401 consecutive patients referred to a syncope unit. We identified patients who had the final diagnosis of PPS. In these patients, we retrieved the initial diagnosis made during their first visit and the subsequent tests performed leading to the final diagnosis...
February 24, 2018: Pacing and Clinical Electrophysiology: PACE
Jesús Escrivá Muñoz, Pedro Gambús, Erik W Jensen, Montserrat Vallverdú
OBJECTIVE: This works investigates the time-frequency content of impedance cardiography signals during a propofol-remifentanil anesthesia. MATERIALS AND METHODS: In the last years, impedance cardiography (ICG) is a technique which has gained much attention. However, ICG signals need further investigation. Time-Frequency Distributions (TFDs) with 5 different kernels are used in order to analyze impedance cardiography signals (ICG) before the start of the anesthesia and after the loss of consciousness...
January 2018: Methods of Information in Medicine
Neil D Detweiler, Kenneth G Vigil, Thomas C Resta, Benjimen R Walker, Nikki L Jernigan
Previous reports indicate roles for acid-sensing ion channels (ASICs) in both peripheral and central chemoreception, but the contributions of ASICs to ventilatory drive in conscious, unrestrained animals remain largely unknown. We tested the hypotheses that ASICs contribute to hypoxic- and hypercapnic-ventilatory responses. Blood samples taken from conscious, unrestrained mice chronically instrumented with femoral artery catheters were used to assess arterial O2, CO2, and pH levels during exposure to inspired gas mixtures designed to cause isocapnic hypoxemia or hypercapnia...
2018: PloS One
Amy L McIntosh, Christy M Christophersen
Motocross is a popular sport in which participants ride a two-wheeled, motorized vehicle on an uneven 2-km track with natural or human-made obstacles. Participants compete at high rates of speed, and children as young as age 4 years compete in age-appropriate groups. Motocross is recognized as a strenuous sport with a high accident rate. Most injuries are musculoskeletal in nature. The most commonly injured areas are the forearm, clavicle, femur, and tibia. Many injuries require surgical treatment. Some patients sustain head trauma with loss of consciousness...
March 1, 2018: Journal of the American Academy of Orthopaedic Surgeons
Laura Abbott, Tricia Scott
BACKGROUND: The United Kingdom has the highest incarceration rate in Western Europe. It is known that women in prison are a vulnerable female population who are at risk of mental ill-health due to disadvantaged and chaotic life experiences. Accurate numbers of pregnant women held in UK prisons are not recorded, yet it is estimated that 6%-7% of the female prison population are at varying stages of pregnancy and around 100 babies are born to incarcerated women each year. There are limited published papers that document the departure of the researcher following closure of fieldwork with women in prison...
January 1, 2018: Nursing Ethics
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