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https://www.readbyqxmd.com/read/27933367/antipsychotic-inductors-of-brain-hypothermia-and-torpor-like-states-perspectives-of-application
#1
REVIEW
Yury S Tarahovsky, Irina S Fadeeva, Natalia P Komelina, Maxim O Khrenov, Nadezhda M Zakharova
Hypothermia and hypometabolism (hypometabothermia) normally observed during natural hibernation and torpor, allow animals to protect their body and brain against the damaging effects of adverse environment. A similar state of hypothermia can be achieved under artificial conditions through physical cooling or pharmacological effects directed at suppression of metabolism and the processes of thermoregulation. In these conditions called torpor-like states, the mammalian ability to recover from stroke, heart attack, and traumatic injuries greatly increases...
December 8, 2016: Psychopharmacology
https://www.readbyqxmd.com/read/27895985/multi-channel-multi-distance-broadband-near-infrared-spectroscopy-system-to-measure-the-spatial-response-of-cellular-oxygen-metabolism-and-tissue-oxygenation
#2
Phong Phan, David Highton, Jonathan Lai, Martin Smith, Clare Elwell, Ilias Tachtsidis
We present a multi-channel, multi-distance broadband near-infrared spectroscopy (NIRS) system with the capability of measuring changes in haemoglobin concentrations (Δ[HbO2], Δ[HHb]), oxidation state of cytochrome-c-oxidase (Δ[oxCCO]) and tissue oxygen saturation (TOI) in the adult human brain. The main components of the instrument are two customized spectrographs and two light sources. Each spectrograph is lens-based to improve light throughput, has a grating enhanced to optimise reflection in the near-infrared (NIR) spectral region and uses a front illuminated cooled CCD camera (-70° C) with a square chip dimension of 12...
November 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27888923/determination-of-time-of-death-in-forensic-science-via-a-3-d-whole-body-heat-transfer-model
#3
Catherine Bartgis, Alexander M LeBrun, Ronghui Ma, Liang Zhu
This study is focused on developing a whole body heat transfer model to accurately simulate temperature decay in a body postmortem. The initial steady state temperature field is simulated first and the calculated weighted average body temperature is used to determine the overall heat transfer coefficient at the skin surface, based on thermal equilibrium before death. The transient temperature field postmortem is then simulated using the same boundary condition and the temperature decay curves at several body locations are generated for a time frame of 24h...
December 2016: Journal of Thermal Biology
https://www.readbyqxmd.com/read/27857953/spinal-cord-thermosensitivity-an-afferent-phenomenon
#4
REVIEW
James A Brock, Robin M McAllen
We review the evidence for thermoregulatory temperature sensors in the mammalian spinal cord and reach the following conclusions. 1) Spinal cord temperature contributes physiologically to temperature regulation. 2) Parallel anterolateral ascending pathways transmit signals from spinal cooling and spinal warming: they overlap with the respective axon pathways of the dorsal horn neurons that are driven by peripheral cold- and warm-sensitive afferents. 3) We hypothesize that these 'cold' and 'warm' ascending pathways transmit all extracranial thermosensory information to the brain...
April 2016: Temperature: Multidisciplinary Biomedical Journal
https://www.readbyqxmd.com/read/27857952/regional-brain-responses-in-humans-during-body-heating-and-cooling
#5
REVIEW
Michael J Farrell
Functional brain imaging of responses to thermal challenge in humans provides a viable method to implicate widespread neuroanatomical regions in the processes of thermoregulation. Thus far, functional neuroimaging techniques have been used infrequently in humans to investigate thermoregulation, although preliminary outcomes have been informative and certainly encourage further forays into this field of enquiry. At this juncture, sustained regional brain activations in response to prolonged changes in body temperature are yet to be definitively characterized, but it would appear that thermoregulatory regions are widely distributed throughout the hemispheres of the human brain...
April 2016: Temperature: Multidisciplinary Biomedical Journal
https://www.readbyqxmd.com/read/27830952/return-to-work-following-acquired-brain-injury-the-views-of-patients-and-employers
#6
Birgit H P M Donker-Cools, Maria J E Schouten, Haije Wind, Monique H W Frings-Dresen
PURPOSE: To investigate which factors are experienced as facilitators of or barriers to return to work (RTW), or as solutions to RTW-problems, by patients with acquired brain injury (ABI) and by employers. DESIGN: Qualitative study. METHOD: Ten patients with ABI and seven employers participated in semi-structured interviews. Patients and employers were unrelated. Transcripts were open coded. Factors perceived to be facilitators, barriers, or solutions to RTW-problems were grouped on a thematic basis...
November 10, 2016: Disability and Rehabilitation
https://www.readbyqxmd.com/read/27823842/cerebral-sinovenous-thrombosis-in-the-asphyxiated-cooled-infants-a-prospective-observational-study
#7
Maurizio Radicioni, Vittorio Bini, Pietro Chiarini, Ambra Fantauzzi, Francesca Leone, Raffaella Scattoni, Pier Giorgio Camerini
BACKGROUND: Cerebral sinovenous thrombosis is unusual in the asphyxiated cooled infants, but reliable data regarding the incidence of this comorbidity are lacking. We assessed the incidence of sinovenous thrombosis in a population of asphyxiated cooled infants by performing routine brain magnetic resonance venography. METHODS: All asphyxiated infants who underwent therapeutic cooling at our institution completed brain magnetic resonance venography after rewarming...
October 6, 2016: Pediatric Neurology
https://www.readbyqxmd.com/read/27808277/the-influence-of-warm-ischemia-elimination-on-kidney-injury-during-transplantation-clinical-and-molecular-study
#8
Dorota Kamińska, Katarzyna Kościelska-Kasprzak, Paweł Chudoba, Agnieszka Hałoń, Oktawia Mazanowska, Agnieszka Gomółkiewicz, Piotr Dzięgiel, Dominika Drulis-Fajdasz, Marta Myszka, Agnieszka Lepiesza, Wojciech Polak, Maria Boratyńska, Marian Klinger
Kidney surface cooling was used during implantation to assess the effect of warm ischemia elimination on allograft function, histological changes and immune-related gene expression. 23 recipients were randomly assigned to a group operated on with kidney surface cooling during implantation (ice bag technique, IBT group), and the other 23 recipients receiving the contralateral kidney from the same donor were operated on with a standard technique. Three consecutive kidney core biopsies were obtained during the transplantation procedure: after organ recovery, after cold ischemia and after reperfusion...
November 3, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27805583/repetitive-transcranial-magnetic-stimulation-to-the-unilateral-hemisphere-of-rat-brain
#9
Jaewon Beom, Jung Chan Lee, Jin Chul Paeng, Tai Ryoon Han, Moon Suk Bang, Byung-Mo Oh
Previous rodent models of repetitive transcranial magnetic stimulation (rTMS) adopted whole-brain stimulation instead of unilateral hemispheric rTMS, which is unlike the protocols used for human subjects. We report a successful application of rTMS to the unilateral hemisphere of rat brain. The rTMS was delivered with a low-frequency (1 Hz), high-frequency (20 Hz), or sham stimulation protocol to one side of the brain by using a small 25-mm figure-8 coil. We placed the center of the coil 1 cm lateral to the vertex on the biauricular line and angulated the coil 45° to the ground to minimize a potential direct effect of rTMS on the contralateral cortex...
October 22, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27799012/selective-brain-hypothermia-mitigates-brain-damage-and-improves-neurological-outcome-after-posttraumatic-decompressive-craniectomy-in-mice
#10
Jacek Szczygielski, Andreas Müller, Angelika E Mautes, Christoph Sippl, Cosmin Glameanu, Karsten Schwerdtfeger, Wolf-Ingo Steudel, Joachim Oertel
Hypothermia and decompressive craniectomy have been considered as treatment for traumatic brain injury. The present study investigates whether selective brain hypothermia added to craniectomy could improve neurological outcome after brain trauma. Male CD-1 mice were assigned into the following groups: sham, decompressive craniectomy (DC), closed head injury (CHI), CHI followed by craniectomy (CHI+DC), CHI+DC followed by focal hypothermia (CHI+DC+H). At 24h posttrauma animals were subjected to Neurological Severity Score test (NSS) and Beam Balance Score test (BBS)...
October 31, 2016: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27784293/simultaneous-acoustic-stimulation-of-human-primary-and-secondary-somatosensory-cortices-using-transcranial-focused-ultrasound
#11
Wonhye Lee, Yong An Chung, Yujin Jung, In-Uk Song, Seung-Schik Yoo
BACKGROUND: Transcranial focused ultrasound (FUS) is gaining momentum as a novel non-invasive brain stimulation method, with promising potential for superior spatial resolution and depth penetration compared to transcranial magnetic stimulation or transcranial direct current stimulation. We examined the presence of tactile sensations elicited by FUS stimulation of two separate brain regions in humans-the primary (SI) and secondary (SII) somatosensory areas of the hand, as guided by individual-specific functional magnetic resonance imaging data...
October 26, 2016: BMC Neuroscience
https://www.readbyqxmd.com/read/27781110/why-fever-phobia-is-still-common
#12
Suzan Gunduz, Esma Usak, Tulin Koksal, Metin Canbal
BACKGROUND: Fever is a reliable sign of illness, but it also evokes fear and anxiety. It is not the fever itself but the fear of possible complications and accompanying symptoms that is important for pediatricians and parents. OBJECTIVES: We aimed to investigate maternal understanding of fever, its potential consequences, and impacts on the treatment of children. PATIENTS AND METHODS: A questionnaire was use to explore the attitudes, knowledge, and practices of mothers of 861 children brought to four medical centers in different regions of Turkey in 2012, with fever being the chief complaint...
August 2016: Iranian Red Crescent Medical Journal
https://www.readbyqxmd.com/read/27779778/cold-pressor-gel-test-a-safe-alternative-to-the-cold-pressor-test-in-fmri
#13
Maryna Lapotka, María Ruz, Alberto Salamanca Ballesteros, Olga Ocón Hernández
PURPOSE: This study describes a new methodology-the cold pressor gel test (CPGT)-for delivering an accessible experimental pain stimulus, which is reproducible and safe for functional MRI (fMRI). METHODS: The cold pressor test was modified to put safety precautions into the CPGT. The material used is cool gelled water with a thickening product, which provides a stable temperature at 0.2 °C. Thirteen women with chronic pelvic pain were scanned using a 3 Tesla (T) MR scanner equipped with a 12-channel head coil...
October 25, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27770521/tonic-influence-of-neocortex-on-hippocampal-seizures
#14
E Saralidze, L Khuchua, I Kobaidze
The interaction between different brain structures could be crucial to predicting seizure occurrence, threshold and spread. Moreover, the sleep-wake cycle and electrical activity of brain structures in different phases of sleep could significantly affect the pattern and extent of seizure spread, and therefore the characteristics of epileptic activity. In this animal model using 15 Wistar rats, we show that the duration of hippocampal seizures, induced by electrical stimulation of the hippocampus, is significantly increased during slow sleep...
September 2016: Georgian Medical News
https://www.readbyqxmd.com/read/27753267/artefact-on-ct-brain-images-caused-by-the-presence-of-air-bubbles-in-the-cooling-oil-of-the-x-ray-tube
#15
Nelson Trieu, Ryan Xia, Robert Loneragan, Lloyd Ridley, Joseph Trieu
INTRODUCTION: We report a series of patients who had computed tomography (CT) of their brains which showed an uncommon artefact caused by excess air bubbles in the cooling oil around the X-ray tube. METHODS: In November and December 2015, it was recognised that artefacts appearing on CT brain images acquired at our department were caused by a scanner fault. The test images were reviewed and the service engineer for the CT scanner was questioned about the artefact cause...
October 18, 2016: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27730694/acylcarnitines-as-markers-of-exercise-associated-fuel-partitioning-xenometabolism-and-potential-signals-to-muscle-afferent-neurons
#16
Jie Zhang, Alan R Light, Charles L Hoppel, Caitlin Campbell, Carol J Chandler, Dustin J Burnett, Elaine C Souza, Gretchen A Casazza, Ronald W Hughen, Nancy L Keim, John W Newman, Gary R Hunter, Jose R Fernandez, W Timothy Garvey, Mary-Ellen Harper, Oliver Fiehn, Sean H Adams
With insulin-resistance or type 2 diabetes mellitus, mismatches between mitochondrial fatty acid fuel delivery and oxidative phosphorylation/tricarboxylic acid cycle activity may contribute to inordinate accumulation of short- or medium-chain acylcarnitine fatty acid derivatives (markers of incomplete long-chain fatty acid oxidation [FAO]). We reasoned that incomplete FAO in muscle would be ameliorated concurrent with improved insulin sensitivity and fitness following a ∼14 wk training and weight loss intervention in obese, sedentary, insulin-resistant women...
October 12, 2016: Experimental Physiology
https://www.readbyqxmd.com/read/27716372/should-we-treat-pyrexia-and-how-do-we-do-it
#17
James F Doyle, Frédérique Schortgen
The concept of pyrexia as a protective physiological response to aid in host defence has been challenged with the awareness of the severe metabolic stress induced by pyrexia. The host response to pyrexia varies, however, according to the disease profile and severity and, as such, the management of pyrexia should differ; for example, temperature control is safe and effective in septic shock but remains controversial in sepsis. From the reported findings discussed in this review, treating pyrexia appears to be beneficial in septic shock, out of hospital cardiac arrest and acute brain injury...
October 3, 2016: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/27708177/neurophysiological-intraoperative-monitoring-during-aortic-arch-surgery
#18
REVIEW
Jeffrey E Keenan, Ehsan Benrashid, Emily Kale, Alina Nicoara, Aatif M Husain, G Chad Hughes
Circulatory management during replacement of the aortic arch is complex and involves a period of circulatory arrest to provide a bloodless field during arch vessel anastomosis. To guard against ischemic brain injury, tissue metabolic demand is reduced by systemically cooling the patient prior to circulatory arrest. Neurophysiological intraoperative monitoring (NIOM) is often used during the course of these procedures to provide contemporaneous assessment of brain status to help direct circulatory management decisions and detect brain ischemia...
December 2016: Seminars in Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/27703056/yawn-duration-predicts-brain-weight-and-cortical-neuron-number-in-mammals
#19
Andrew C Gallup, Allyson M Church, Anthony J Pelegrino
Research indicates that the motor action pattern of yawning functions to promote cortical arousal and state change through enhanced intracranial circulation and brain cooling. Because the magnitude of this response likely corresponds to the degree of neurophysiological change, we hypothesized that interspecies variation in yawn duration would correlate with underlying neurological differences. Using openly accessible data, we show that both the mean and variance in yawn duration are robust predictors of mammalian brain weight and cortical neuron number (ρ-values > 0...
October 2016: Biology Letters
https://www.readbyqxmd.com/read/27686339/a-new-approach-to-selective-brain-cooling-by-a-ranque-hilsch-vortex-tube
#20
Mohammad Fazel Bakhsheshi, Yong Wang, Lynn Keenliside, Ting-Yim Lee
BACKGROUND: Target temperature management is the single most effective intervention and the gold standard in post-resuscitation care today. However, cooling the whole body below 33-34 °C can cause severe complications. Therefore, developing a selective brain cooling (SBC) approach which can be initiated early to induce rapid cooling and maintain the target temperature over 12-24 h before slowly rewarming brain temperature by itself alone would be advantageous. Vortex tubes are simple mechanical devices generating cold air from a stream of compressed air without applied chemical or energy...
December 2016: Intensive Care Medicine Experimental
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