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https://www.readbyqxmd.com/read/29142237/inner-ear-otolith-asymmetry-in-late-larval-cichlid-fish-oreochromis-mossambicus-perciformes-showing-kinetotic-behaviour-under-diminished-gravity
#1
Ralf Anken, Miriam Knie, Reinhard Hilbig
The inner ears of all vertebrates are designed to perceive auditory and vestibular inputs. Although a tremendous diversity in the inner ear can be found even among bony fishes, the morphologies of the utricle and of the semicircular canals are rather conservative among vertebrates. Fish show kinetoses under reduced gravity (spinning movements and looping responses) and are regarded model organisms concerning the performance of the otolithic organs. Otoliths can be analysed easily because they are compact, in contrast to the otoconial masses of other vertebrates...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29139207/patient-reported-outcomes-of-slow-single-arc-rotation-do-we-need-rotating-gantries
#2
Brendan Whelan, Miriam Welgampola, Leigh McGarvie, Kuldeep Makhija, Robin M Turner, Lois Holloway, Ilana Feain, Michael Jackson, Michael Barton, Paul Keall
INTRODUCTION: Patient rotation could greatly simplify radiation therapy delivery, with particularly important ramifications for fixed beam treatment with protons, heavy ions, MRI-Linacs, and low cost Linacs. Patient tolerance is often cited as a barrier to widespread implementation to patient rotation; however, no quantitative data addressing this issue exists. In this study, patient reported experiences of slow, single arc rotation in upright (sitting) and lying orientations are reported...
November 15, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/29121059/effects-of-decades-of-physical-driving-on-body-movement-and-motion-sickness-during-virtual-driving
#3
Thomas A Stoffregen, Chih-Hui Chang, Fu-Chen Chen, Wei-Jhong Zeng
We investigated relations between experience driving physical automobiles and motion sickness during the driving of virtual automobiles. Middle-aged individuals drove a virtual automobile in a driving video game. Drivers were individuals who had possessed a driver's license for approximately 30 years, and who drove regularly, while non-drivers were individuals who had never held a driver's license, or who had not driven for more than 15 years. During virtual driving, we monitored movement of the head and torso...
2017: PloS One
https://www.readbyqxmd.com/read/29118373/establishing-zebrafish-as-a-model-to-study-the-anxiolytic-effects-of-scopolamine
#4
Trevor J Hamilton, Adam Morrill, Kayla Lucas, Joshua Gallup, Megan Harris, Meghan Healey, Taylor Pitman, Melike Schalomon, Shannon Digweed, Martin Tresguerres
Scopolamine (hyoscine) is a muscarinic acetylcholine receptor antagonist that has traditionally been used to treat motion sickness in humans. However, studies investigating depressed and bipolar populations have found that scopolamine is also effective at reducing depression and anxiety symptoms. The potential anxiety-reducing (anxiolytic) effects of scopolamine could have great clinical implications for humans; however, rats and mice administered scopolamine showed increased anxiety in standard behavioural tests...
November 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29095749/genetics-of-vestibular-syndromes
#5
Pablo Roman-Naranjo, Alvaro Gallego-Martinez, Jose A Lopez Escamez
PURPOSE OF REVIEW: The increased availability of next generation sequencing has enabled a rapid progress in the discovery of genetic variants associated with vestibular disorders. We have summarized molecular genetics finding in vestibular syndromes during the last 18 months. RECENT FINDINGS: Genetic studies continue to shed light on the genetic background of vestibular disorders. Novel genes affecting brain development and otolith biogenesis have been associated with motion sickness...
November 1, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29081425/effect-of-visual-input-on-postural-stability-in-young-adults-with-chronic-motion-sensitivity-a-controlled-cross-sectional-study
#6
Ahmad A Alharbi, Eric G Johnson, Abdulaziz A Albalwi, Noha S Daher, Tim K Cordett, Oluwaseun I Ambode, Fahad H Alshehri
BACKGROUND: Chronic motion sensitivity (CMS) has been defined as a feeling of un-wellness elicited by either actual or perceived motion. CMS is a common condition and is more prevalent in females than in males. In addition to a variety of symptoms, young adults with CMS have less postural stability than those without CMS. OBJECTIVE: To determine whether dependence on visual cues for postural stability is different between young adults with and without CMS, and whether it differs by gender within each group...
2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29064869/vision-and-vestibular-system-dysfunction-predicts-prolonged-concussion-recovery-in-children
#7
Christina L Master, Stephen R Master, Douglas J Wiebe, Eileen P Storey, Julia E Lockyer, Olivia E Podolak, Matthew F Grady
OBJECTIVE: Up to one-third of children with concussion have prolonged symptoms lasting beyond 4 weeks. Vision and vestibular dysfunction is common after concussion. It is unknown whether such dysfunction predicts prolonged recovery. We sought to determine which vision or vestibular problems predict prolonged recovery in children. DESIGN: A retrospective cohort of pediatric patients with concussion. SETTING: A subspecialty pediatric concussion program...
October 20, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29064824/uncoupling-vor-and-vestibuloautonomic-retention-to-coriolis-acceleration-training-in-student-pilots-and-control-subjects
#8
Linjie Wang, Yi Cao, Cheng Tan, Qi Zhao, Siyang He, Dongbin Niu, Guohua Tang, Peng Zou, Lei Xing
PURPOSE: Explore the different vestibular physiologic response retention patterns after Coriolis acceleration training in student pilots and extend the results for use with Chinese astronauts in the future. METHODS: Twelve healthy control male subjects were screened from males familiar with vestibular training and who physically resembled the astronauts. Fourteen student pilots were selected from 23 participants by rotational vestibular function tests. All subjects were exposed to five-day continuous or intermittent Coriolis acceleration training...
2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/29060817/virtual-reality-body-motion-induced-navigational-controllers-and-their-effects-on-simulator-sickness-and-pathfinding
#9
Cassandra N Aldaba, Paul J White, Ahmad Byagowi, Zahra Moussavi
Virtual reality (VR) navigation is usually constrained by plausible simulator sickness (SS) and intuitive user interaction. The paper reports on the use of four different degrees of body motion induced navigational VR controllers, a TiltChair, omni-directional treadmill, a manual wheelchair joystick (VRNChair), and a joystick in relation to a participant's SS occurrence and a controller's intuitive utilization. Twenty young adult participants utilized all controllers to navigate through the same VR task environment in separate sessions...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29046173/effects-of-physical-driving-experience-on-body-movement-and-motion-sickness-during-virtual-driving
#10
Chih-Hui Chang, Fu-Chen Chen, Wei-Ching Kung, Thomas A Stoffregen
BACKGROUND: In previous research on motion sickness in simulated and virtual vehicles, subjects' experience controlling the corresponding physical vehicles has been confounded with their age. During driving of virtual automobiles in a video game, we separated chronological age from experience driving physical automobiles. METHODS: Subjects drove a virtual automobile in a driving video game. Drivers were young adults with several years of experience driving physical automobiles, while nondrivers were individuals in the same age group who did not have a driver's license and had never driven an automobile...
November 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28923138/orientation-preferences-and-motion-sickness-induced-in-a-virtual-reality-environment
#11
Wei Chen, Jian-Gang Chao, Yan Zhang, Jin-Kun Wang, Xue-Wen Chen, Cheng Tan
BACKGROUND: Astronauts' orientation preferences tend to correlate with their susceptibility to space motion sickness (SMS). Orientation preferences appear universally, since variable sensory cue priorities are used between individuals. However, SMS susceptibility changes after proper training, while orientation preferences seem to be intrinsic proclivities. The present study was conducted to investigate whether orientation preferences change if susceptibility is reduced after repeated exposure to a virtual reality (VR) stimulus environment that induces SMS...
October 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28919769/evaluating-the-antiemetic-administration-consistency-to-prevent-chemotherapy-induced-nausea-and-vomiting-with-the-standard-guidelines-a-prospective-observational-study
#12
Afsaneh Vazin, Davood Eslami, Ebrahim Sahebi
Nausea and vomiting (NV) are the most prevalent adverse effects of chemotherapy (CT). This study was conducted to evaluate adherence of the health care team to standard guidelines for antiemetics usage to prevent acute chemotherapy-induced nausea and vomiting (CINV) in a large CT center. A prospective study was performed during an 11-month period on patients receiving CT. A form was designed to collect patients' demographic information and their chemotherapeutic and antiemetic regimen data. The Likert scale was used to measure the effectiveness of the antiemetics in patients...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28889981/visual-vestibular-conflict-detection-depends-on-fixation
#13
Isabelle T Garzorz, Paul R MacNeilage
Visual and vestibular signals are the primary sources of sensory information for self-motion. Conflict among these signals can be seriously debilitating, resulting in vertigo [1], inappropriate postural responses [2], and motion, simulator, or cyber sickness [3-8]. Despite this significance, the mechanisms mediating conflict detection are poorly understood. Here we model conflict detection simply as crossmodal discrimination with benchmark performance limited by variabilities of the signals being compared. In a series of psychophysical experiments conducted in a virtual reality motion simulator, we measure these variabilities and assess conflict detection relative to this benchmark...
September 25, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28879315/postoperative-nausea-and-vomiting-after-general-anesthesia-for-oral-and-maxillofacial-surgery
#14
Benjamas Apipan, Duangdee Rummasak, Natthamet Wongsirichat
BACKGROUND: Postoperative nausea and vomiting (PONV) is one of the most common postoperative complications. Despite this, few papers have reported the incidence and independent risk factors associated with PONV in the context of oral and maxillofacial surgery (OMFS). Therefore, we sought to determine the incidence of PONV, as well as to identify risk factors for the condition in patients who had undergone OMFS under general anesthesia. METHODS: A total of 372 patients' charts were reviewed, and the following potential risk factors for PONV were analyzed: age, sex, body mass index, smoking status, history of PONV and/or motion sickness, duration of anesthesia, amount of blood loss, nasogastric tube insertion and retention and postoperative opioid used...
December 2016: J Dent Anesth Pain Med
https://www.readbyqxmd.com/read/28862519/novel-insights-into-symptomatology-of-moyamoya-disease-in-pediatric-patients-survey-of-symptoms-suggestive-of-orthostatic-intolerance
#15
Haruto Uchino, Ken Kazumata, Masaki Ito, Naoki Nakayama, Kiyohiro Houkin
OBJECTIVE A specific population of young patients with moyamoya disease (MMD) persistently experience physical symptoms not attributable to focal ischemia. These symptoms, highly suggestive of orthostatic intolerance (also termed "orthostatic dysregulation"), were investigated and reported as potential determinants of quality of life in young MMD patients. METHODS Forty-six patients (6-30 years of age) were selected from a group of 122 patients who were diagnosed with MMD before 18 years of age. The authors administered a structured questionnaire consisting of 11 items based on screening checklists published in the Japanese clinical guidelines for juvenile orthostatic dysregulation in young patients...
November 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28835815/correction-to-figures-a-reply-to-hwang-and-peli-2014
#16
Zhongpai Gao
In Hwang and Peli (2014), few errors occurred in computing the angular disparities. The direction of peripheral depth distortion (the angular disparity differences between what it is in real-world 3D viewing and S3D viewing) is reversed when the computational errors were corrected, making the perception of the peripheral depth to be expanded, not compressed. This reply points to the error and provides the corrected figures. Correcting these errors does not affect the general conclusion that S3D viewed on single screen display induces peripheral depth distortion which may be a cause of visually induced motion sickness...
July 2017: I-Perception
https://www.readbyqxmd.com/read/28834943/clinical-characteristics-of-benign-recurrent-vestibulopathy-clearly-distinctive-from-vestibular-migraine-and-meni%C3%A3-re-s-disease
#17
Babette F van Esch, Erik van Wensen, Hester J van der Zaag-Loonen, Peter Paul G van Benthem, Roeland B van Leeuwen
OBJECTIVE: We aimed to systematically investigate the clinical characteristics of benign recurrent vestibulopathy (BRV), vestibular migraine (VM), and Menière's disease (MD) and to assess whether clinical symptoms exist that are unique to BRV. STUDY DESIGN: Prospective cohort study. SETTING: Tertiary referral center. METHODS: Between January 2015 and November 2016, patients were prospectively recruited at a specialized dizziness clinic...
October 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28802464/mirage-events-driver-haptic-steering-alerts-in-a-motion-base-driving-simulator-a-method-for-selecting-an-optimal-hmi
#18
Walter Talamonti, Louis Tijerina, Mike Blommer, Radhakrishnan Swaminathan, Reates Curry, R Darin Ellis
This paper describes a new method, a 'mirage scenario,' to support formative evaluation of driver alerting or warning displays for manual and automated driving. This method provides driving contexts (e.g., various Times-To-Collision (TTCs) to a lead vehicle) briefly presented and then removed. In the present study, during each mirage event, a haptic steering display was evaluated. This haptic display indicated a steering response may be initiated to drive around an obstacle ahead. A motion-base simulator was used in a 32-participant study to present vehicle motion cues similar to the actual application...
November 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28777827/effects-of-visual-flow-direction-on-signs-and-symptoms-of-cybersickness
#19
Alireza Mazloumi Gavgani, Deborah M Hodgson, Eugene Nalivaiko
Our objective was to assess the influence of visual flow direction on physiological changes and symptoms elicited by cybersickness. Twelve healthy subjects (6 male and 6 female) were exposed to a 15-min virtual ride on a rollercoaster on two different days in a counterbalanced manner, such half of participants were facing forward during the first ride while another half was facing backward. Forehead skin conductance, heart rate and HRV parameters (SDRR, RMSSD) were collected as objective measures; subjective symptoms were assessed with the Motion Sickness Assessment Questioner immediately after exposure...
2017: PloS One
https://www.readbyqxmd.com/read/28739058/acupressure-in-management-of-postoperative-nausea-and-vomiting-in-high-risk-ambulatory-surgical-patients
#20
Debra Hofmann, Carrie Murray, Janet Beck, Rebecca Homann
PURPOSE: The purpose of this randomized blinded placebo-controlled research study was to investigate the effect of acupressure over 24 hours postoperatively for ambulatory surgical patients who are identified as high risk for PONV. DESIGN: A randomized blinded placebo-controlled study design was implemented. METHODS: Study enrollment criteria included four of five risk factors as defined in 2006 by American Society of PeriAnesthesia Nurses PONV/postdischarge nausea and vomiting guidelines: female, PONV history or motion sickness, nonsmoker, and volatile gas general anesthetic...
August 2017: Journal of Perianesthesia Nursing: Official Journal of the American Society of PeriAnesthesia Nurses
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