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Postural ET

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https://www.readbyqxmd.com/read/29151141/mechanical-perturbations-can-elicit-triggered-reactions-in-the-absence-of-a-startle-response
#1
Christopher J Forgaard, Ian M Franks, Kimberly Bennett, Dana Maslovat, Romeo Chua
Perturbations delivered to the upper limbs elicit reflexive responses in stretched muscle at short- (M1: 25-50 ms) and long- (M2: 50-100 ms) latencies. When presented in a simple reaction time (RT) task, the perturbation can also elicit a preprogrammed voluntary response at a latency (< 100 ms) that overlaps the M2 response. This early appearance of the voluntary response following a proprioceptive stimulus causing muscle stretch is called a triggered reaction. Recent work has demonstrated that a perturbation also elicits activity in sternocleidomastoid (SCM) over a time-course consistent with the startle response and it was, therefore, proposed that the StartReact effect underlies triggered reactions (Ravichandran et al...
November 18, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29140159/athletes-rated-as-poor-single-leg-squat-performers-display-measureable-differences-in-single-leg-squat-biomechanics-compared-to-good-performers
#2
Lachlan E Garrick, Bryce C Alexander, Anthony G Schache, Marcus G Pandy, Kay M Crossley, Natalie J Collins
CONTEXT: It is important to validate single-leg squat visual rating criteria used in clinical practice and research. Foot orthoses may improve single-leg squat performance in those who demonstrate biomechanics associated with increased risk of lower-limb injury. OBJECTIVE: Validate visual rating criteria proposed by Crossley et al, by determining whether athletes rated as poor single-leg squat performers display different single-leg squat biomechanics than good performers; and evaluate immediate effects of foot orthoses on single-leg squat biomechanics in poor performers...
November 15, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29136548/wavelet-coherence-analysis-a-new-approach-to-distinguish-organic-and-functional-tremor-types
#3
G Kramer, A M M Van der Stouwe, N M Maurits, M A J Tijssen, J W J Elting
OBJECTIVE: To distinguish tremor subtypes using wavelet coherence analysis (WCA). WCA enables to detect variations in coherence and phase difference between two signals over time and might be especially useful in distinguishing functional from organic tremor. METHODS: In this pilot study, polymyography recordings were studied retrospectively of 26 Parkinsonian (PT), 26 functional (FT), 26 essential (ET), and 20 enhanced physiological (EPT) tremor patients. Per patient one segment of 20 s in duration, in which tremor was present continuously in the same posture, was selected...
October 14, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29102253/square-biphasic-pulse-deep-brain-stimulation-for-essential-tremor-the%C3%A2-bip-tremor-study
#4
Sol De Jesus, Leonardo Almeida, Leili Shahgholi, Daniel Martinez-Ramirez, Jaimie Roper, Chris J Hass, Umer Akbar, Aparna Wagle Shukla, Robert S Raike, Michael S Okun
BACKGROUND: Conventional deep brain stimulation (DBS) utilizes regular, high frequency pulses to treat medication-refractory symptoms in essential tremor (ET). Modifications of DBS pulse shape to achieve improved effectiveness is a promising approach. OBJECTIVES: The current study assessed the safety, tolerability and effectiveness of square biphasic pulse shaping as an alternative to conventional ET DBS. METHODS: This pilot study compared biphasic pulses (BiP) versus conventional DBS pulses (ClinDBS)...
October 20, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28981951/-progress-in-genetic-research-on-essential-tremor
#5
Yuwen Zhao, Qiying Sun, Kai Li, Jifeng Guo, Beisha Tang, Xinxiang Yan
Essential tremor (ET) is one of the most common movement disorders. Its clinical manifestations not only include typical kinetic and/or postural tremors, but also other non-motor symptoms such as cognitive dysfunction, sleep disturbance, and dysosmia. The exact etiology and pathogenesis of ET is still unknown. Approximately 60% of ET patients have a family history, and genetic factor plays an important role in the onset of the disease. Researchers have so far identified 3 genetic loci (ETM 1-3) through family studies, and proposed additional causative genes such as FUS, HTRA2, TENM4, NOS3 and susceptibility genes such as LINGO, SLC1A2, and GABA...
October 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28936167/a-somatic-movement-approach-to-fostering-emotional-resiliency-through-laban-movement-analysis
#6
Rachelle P Tsachor, Tal Shafir
Although movement has long been recognized as expressing emotion and as an agent of change for emotional state, there was a dearth of scientific evidence specifying which aspects of movement influence specific emotions. The recent identification of clusters of Laban movement components which elicit and enhance the basic emotions of anger, fear, sadness and happiness indicates which types of movements can affect these emotions (Shafir et al., 2016), but not how best to apply this knowledge. This perspective paper lays out a conceptual groundwork for how to effectively use these new findings to support emotional resiliency through voluntary choice of one's posture and movements...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28931792/effects-of-prenatal-methylmercury-exposure-from-minamata-disease-to-environmental-health-studies
#7
REVIEW
Mineshi Sakamoto, Takaaki Itai, Katsuyuki Murata
Methylmercury, the causative agent of Minamata disease, can easily penetrate the brain, and adult-type Minamata disease patients showed neurological symptoms according to the brain regions where the neurons, mainly in the cerebrum and cerebellum, were damaged. In addition, fetuses are exposed to methylmercury via the placenta from maternal fish consumption, and high-level exposure to methylmercury causes damage to the brains of infants. Typical patients with fetal-type Minamata disease (i.e., serious poisoning caused by in utero exposure to methylmercury) were born during the period of severe methylmercury pollution in 1955-1959, although they showed no abnormality during gestation nor at delivery...
2017: Nihon Eiseigaku Zasshi. Japanese Journal of Hygiene
https://www.readbyqxmd.com/read/28884038/differential-diagnosis-of-parkinson-disease-essential-tremor-and-enhanced-physiological-tremor-with-the-tremor-analysis-of-emg
#8
Jie Zhang, Yan Xing, Xiuli Ma, Liqun Feng
We investigate the differential diagnostic value of tremor analysis of EMG on Parkinson's disease (PD), essential tremor (ET), and enhanced physiological tremor (EPT). Clinical data from 25 patients with PD, 20 patients with ET, and 20 patients with EPT were collected. The tremor frequency and muscle contraction pattern of the resting, posture, and 500 g and 1000 g overload were recorded. The frequency of PD tremor was 4-6 Hz, and the frequency of ET was also in this range; the frequency of EPT is 6-12 hz having some overlap with PD...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28817495/nursing-management-of-the-patient-undergoing-focused-ultrasound-a-new-treatment-option-for-essential-tremor
#9
Katherine Dale Shaw, Amy Sue Johnston, Shelly Rush-Evans, Susan Prather, Kathy Maynard
Essential tremor (ET) is among the most common neurological movement disorders that causes postural or action tremors, with an estimated prevalence nationwide of less than 3% of the population. The incidence of ET increases with age but often affects younger adults and has a familial trait association. Depending on disease progression, ET can cause significant limitations for individuals, in many cases, significantly limiting their ability to perform activities of daily living and occupational responsibilities...
October 2017: Journal of Neuroscience Nursing: Journal of the American Association of Neuroscience Nurses
https://www.readbyqxmd.com/read/28803518/a-feminist-intervention-that-hurt-women-biological-differences-ergonomics-and-occupational-health-une-intervention-f%C3%A3-ministe-qui-a-nui-aux-femmes-diff%C3%A3-rences-biologiques-%C3%A3-galit%C3%A3-ergonomie-et-sant%C3%A3-au-travail
#10
Karen Messing
The University of Québec in Montréal has agreements with trade unions providing access to university resources. Researchers involved in this program worked in partnership with union women's and health and safety committees for more than twenty years. Not all studies succeeded in improving women's working conditions. One joint project involved observational studies of tasks done by health-care workers, complemented by interviews and questionnaires. We found that task assignments, movements, postures, and work-related musculoskeletal disorders varied by gender/sex and made recommendations for change...
January 1, 2017: New Solutions: a Journal of Environmental and Occupational Health Policy: NS
https://www.readbyqxmd.com/read/28706360/osteoporosis-prevention-and-management
#11
Muralidhar V Pai
Osteoporosis, defined by BMD at the hip or lumbar spine that is less than or equal to 2.5 standard deviations below the mean BMD of a young-adult reference population, is the most common bone disease in humans affecting both sexes and all races. It's a silent killer affecting the quality of life due to fractures and postural changes. In osteoporosis there is an imbalance between bone formation and bone resorption in favor of latter. Preventive measures and treatments are available to combat this evil. Counseling is the integral part of prevention as well as treatment of osteoporosis...
August 2017: Journal of Obstetrics and Gynaecology of India
https://www.readbyqxmd.com/read/28693401/formulating-autism-systemically-part-1-a-review-of-the-published-literature-and-case-assessments
#12
Patricia M Crittenden
Autism is a psychiatric disorder of unknown aetiology. In this article, the literature on genetic, neurological, psychological, relational and cultural causes of autism is reviewed, beginning with the 2014 review of Crittenden, Dallos, Landini et al. (pp. 64-70) up to and including recent publications in 2017. Some of the findings were unexpected; others led to new questions. The unexpected findings were the minimal contribution of genes to autism, the extremely evident neurological differences, the interpersonal quality of the psychological findings (that lacked evidence of parents' behaviour), the relational evidence that mothers' childhood trauma, perinatal stress and marital stress increased the risk of autism, and the reciprocal relation between funding for treatment of autism and diagnoses of autism...
July 2017: Clinical Child Psychology and Psychiatry
https://www.readbyqxmd.com/read/28688367/postural-motor-learning-in-parkinson-s-disease-the-effect-of-practice-on-continuous-compensatory-postural-regulation
#13
Karen Van Ooteghem, James S Frank, Fay B Horak
INTRODUCTION: Although balance training is considered the most effective treatment for balance impairments in Parkinson's disease (PD), few studies have examined if learning for balance control remains intact with PD. This study aimed to determine if learning for automatic postural responses is preserved in people with PD. METHODS: Eleven participants with moderate PD (68±6.4years; H&Y: 2-3) on their usual medication maintained balance on a platform that oscillated forward and backward with variable amplitude and constant frequency...
September 2017: Gait & Posture
https://www.readbyqxmd.com/read/28668186/an-active-balance-board-system-with-real-time-control-of-stiffness-and-time-delay-to-assess-mechanisms-of-postural-stability
#14
Denise R Cruise, James R Chagdes, Joshua J Liddy, Shirley Rietdyk, Jeffrey M Haddad, Howard N Zelaznik, Arvind Raman
Increased time-delay in the neuromuscular system caused by neurological disorders, concussions, or advancing age is an important factor contributing to balance loss (Chagdes et al., 2013, 2016a,b). We present the design and fabrication of an active balance board system that allows for a systematic study of stiffness and time-delay induced instabilities in standing posture. Although current commercial balance boards allow for variable stiffness, they do not allow for manipulation of time-delay. Having two controllable parameters can more accurately determine the cause of balance deficiencies, and allows us to induce instabilities even in healthy populations...
June 21, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28576604/task-dependent-variability-of-essential-tremor
#15
Nicole Schuhmayer, Corinna Weber, Markus Kieler, Bernhard Voller, Walter Pirker, Eduard Auff, Dietrich Haubenberger
INTRODUCTION: In Essential Tremor (ET), tremor characteristics and the impairment caused by tremor may vary from task to task. A variability of tremor frequency between postural and kinetic tasks has been proposed in ET, suggesting either multiple central oscillating networks, or peripheral or proprioceptive feedback-mechanisms. This electrophysiological study aimed to assess tremor frequencies and amplitudes in tasks involving postural and kinetic tremor, and compare findings within and across tasks, to delineate physiological differences underlying individually affected manual tasks in ET...
May 20, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28553249/yoga-poses-increase-subjective-energy-and-state-self-esteem-in-comparison-to-power-poses
#16
Agnieszka Golec de Zavala, Dorottya Lantos, Deborah Bowden
Research on beneficial consequences of yoga focuses on the effects of yogic breathing and meditation. Less is known about the psychological effects of performing yoga postures. The present study investigated the effects of yoga poses on subjective sense of energy and self-esteem. The effects of yoga postures were compared to the effects of 'power poses,' which arguably increase the sense of power and self-confidence due to their association with interpersonal dominance (Carney et al., 2010). The study tested the novel prediction that yoga poses, which are not associated with interpersonal dominance but increase bodily energy, would increase the subjective feeling of energy and therefore increase self-esteem compared to 'high power' and 'low power' poses...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28536547/the-stance-leads-the-dance-the-emergence-of-role-in-a-joint-supra-postural-task
#17
Tehran J Davis, Gabriela B Pinto, Adam W Kiefer
Successfully meeting a shared goal usually requires co-actors to adopt complementary roles. However, in many cases, who adopts what role is not explicitly predetermined, but instead emerges as a consequence of the differences in the individual abilities and constraints imposed upon each actor. Perhaps the most basic of roles are leader and follower. Here, we investigated the emergence of "leader-follower" dynamics in inter-personal coordination using a joint supra-postural task paradigm (Ramenzoni et al., 2011; Athreya et al...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28522756/influence-of-sex-menstrual-cycle-and-oral-contraceptives-on-cerebrovascular-resistance-and-cardiorespiratory-function-during-valsalva-or-standing
#18
Syed Abidi, Misha Nili, Stephania Serna, Simon Kim, Christopher Hazlett, Heather Edgell
Women experience orthostatic intolerance more than men, and experience faintness more in the early follicular (i.e. low hormone (LH)) compared to the luteal (i.e. high hormone (HH)) phase of the menstrual cycle. Men (n=13, age: 25.8±1.8) and women in the LH (day 2-5; placebo) and HH) (day 18-24; high dose) phases of the menstrual cycle with (OC; n=14, age: 22.0±0.8) or without oral contraceptives (NOC; n=12, age: 21.8±0.5) underwent the Valsalva maneuver and a supine-sit-stand protocol. Blood pressure, normalized stroke volume (SVi), cardiac output index (Qi), heart rate (HR), end-tidal carbon dioxide (ET-CO2), and middle cerebral artery blood velocity (MCA) were measured...
May 18, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28521951/validation-of-the-anybody-full-body-musculoskeletal-model-in-computing-lumbar-spine-loads-at-l4l5-level
#19
Tito Bassani, Elena Stucovitz, Zhihui Qian, Matteo Briguglio, Fabio Galbusera
In the panorama of available musculoskeletal modeling software, AnyBody software is a commercial tool that provides a full body musculoskeletal model which is increasingly exploited by numerous researchers worldwide. In this regard, model validation becomes essential to guarantee the suitability of the model in representing the simulated system. When focusing on lumbar spine, the previous works aimed at validating the AnyBody model in computing the intervertebral loads held several limitations, and a comprehensive validation is to be considered as lacking...
May 5, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28504361/alterations-of-resting-state-fmri-measurements-in-individuals-with-cervical-dystonia
#20
Zhihao Li, Cecília N Prudente, Randall Stilla, K Sathian, H A Jinnah, Xiaoping Hu
Cervical dystonia (CD) is a neurological disorder with typical symptoms of involuntary and abnormal movements and postures of the head. CD-associated alterations of functional brain networks have not been well characterized. Previous studies of CD using resting-state functional MRI (rfMRI) are limited in two aspects: (i) the analyses were not directly focused on the functional brain network related to head movement and (ii) rfMRI measurements other than functional connectivity (FC) were not investigated. The present study examined alterations of FC in CD by capitalizing on newly identified brain regions supporting isometric head rotation (Prudente et al...
August 2017: Human Brain Mapping
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