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https://www.readbyqxmd.com/read/29129160/visual-but-not-motor-processes-predict-simple-visuomotor-reaction-time-of-badminton-players
#1
Thorben Hülsdünker, Heiko K Strüder, Andreas Mierau
The athlete's brain exhibits significant functional adaptations that facilitate visuomotor reaction performance. However, it is currently unclear if the same neurophysiological processes that differentiate athletes from non-athletes also determine performance within a homogeneous group of athletes. This information can provide valuable help for athletes and coaches aiming to optimize existing training regimes. Therefore, this study aimed to identify the neurophysiological correlates of visuomotor reaction performance in a group of skilled athletes...
November 12, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29126811/properties-of-tonic-episodes-of-masseter-muscle-activity-during-waking-hours-and-sleep-in-subjects-with-and-without-history-of-orofacial-pain
#2
Acing Habibie Mude, Shigehisa Kawakami, Seiya Kato, Shogo Minagi
PURPOSE: To provide a scientific data related to the tonic activity of masseter muscle in subjects with and without history of orofacial pain during their normal daily life. METHODS: Thirty-three subjects were divided into two groups, a pain history group (PHG) and a non-pain history group (non-PHG), based on their responses to the Research Diagnostic Criteria for Temporomandibular Disorders questionnaire. After excluding four subjects with incomplete recordings, full-day masseter muscle surface EMGs of 29 subjects (10 men, 19 women; mean age 24...
November 7, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29121510/emg-normalization-method-based-on-grade-3-of-manual-muscle-testing-within-and-between-day-reliability-of-normalization-tasks-and-application-to-gait-analysis
#3
Anne Tabard-Fougère, Kevin Rose-Dulcina, Vincent Pittet, Romain Dayer, Nicolas Vuillerme, Stéphane Armand
Electromyography (EMG) is an important parameter in Clinical Gait Analysis (CGA), and is generally interpreted with timing of activation. EMG amplitude comparisons between individuals, muscles or days need normalization. There is no consensus on existing methods. The gold standard, maximum voluntary isometric contraction (MVIC), is not adapted to pathological populations because patients are often unable to perform an MVIC. The normalization method inspired by the isometric grade 3 of manual muscle testing (isoMMT3), which is the ability of a muscle to maintain a position against gravity, could be an interesting alternative...
November 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29112784/clinical-and-genetic-features-of-patients-with-facial-sparing-facioscapulohumeral-muscular-dystrophy
#4
J-J He, X-D Lin, F Lin, G-R Xu, L-Q Xu, W Hu, D-N Wang, H-X Lin, M-T Lin, N Wang, Z-Q Wang
BACKGROUND AND PURPOSE: Facial-sparing scapular myopathy (SHD) is the most common atypical form of facioscapulohumeral muscular dystrophy (FSHD), clinically defined as those without apparent facial muscle weakness on neurologic examination. The clinical profiles and genetic features of SHD are limited. METHODS: A cohort of 21 Chinese patients with SHD were confirmed by PFGE-based molecular genetic analysis. The clinical assessments and methylation analysis were noted...
November 7, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29111113/understanding-the-relationship-between-brain-and-upper-limb-function-in-children-with-unilateral-motor-impairments-a-multimodal-approach
#5
Maya Weinstein, Dido Green, Julian Rudisch, Ingar M Zielinski, Marta Benthem-Muñiz, Marijtje L A Jongsma, Verity McClelland, Bert Steenbergen, Shelly Shiran, Dafna Ben Bashat, Gareth J Barker
Atypical brain development and early brain injury have profound and long lasting impact on the development, skill acquisition, and subsequent independence of a child. Heterogeneity is present at the brain level and at the motor level; particularly with respect to phenomena of bilateral activation and mirrored movements (MMs). In this multiple case study we consider the feasibility of using several modalities to explore the relationship between brain structure and/or activity and hand function: Electroencephalography (EEG), both structural and functional Magnetic Resonance Imaging (sMRI, fMRI), diffusion tensor imaging (DTI), transcranial magnetic stimulation (TMS), Electromyography (EMG) and hand function assessments...
October 12, 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/29101910/spatial-electromyography-distribution-pattern-of-the-vastus-lateralis-muscle-during-ramp-up-contractions-in-parkinson-s-disease-patients
#6
Yuichi Nishikawa, Kohei Watanabe, Tetsuya Takahashi, Naoya Orita, Hiroaki Kimura, Masayasu Matsumoto, Hirofumi Maruyama
Parkinson's disease (PD) related decreases in muscle strength may result from both central and peripheral factors. However, the effect of PD on the neuromuscular system, such as motor unit activation properties, remains unclear. The purpose of the present study was to compare the spatial distribution pattern of electromyographic activity during sustained contractions in healthy subjects and PD patients. Twenty-five female PD patients and 25 healthy age-matched female control subjects performed ramp submaximal contractions during an isometric knee extension from 20% to 80% of the maximal voluntary contraction (MVC)...
October 19, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29101844/early-corticospinal-tract-damage-in-prodromal-sca2-revealed-by-eeg-emg-and-emg-emg-coherence
#7
Luis Velázquez-Pérez, Johannes Tünnerhoff, Roberto Rodríguez-Labrada, Reidenis Torres-Vega, Yusely Ruiz-Gonzalez, Paolo Belardinelli, Jacqueline Medrano-Montero, Nalia Canales-Ochoa, Yanetza González-Zaldivar, Yaimeé Vazquez-Mojena, Georg Auburger, Ulf Ziemann
OBJECTIVE: Clinical data suggest early involvement of the corticospinal tract (CST) in spinocerebellar ataxia type 2 (SCA2). Here we tested if early CST degeneration can be detected in prodromal SCA2 mutation carriers by electrophysiological markers of CST integrity. METHODS: CST integrity was tested in 15 prodromal SCA2 mutation carriers, 19 SCA2 patients and 25 age-matched healthy controls, using corticomuscular (EEG-EMG) and intermuscular (EMG-EMG) coherence measures in upper and lower limb muscles...
October 20, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29080325/rapid-facial-reactions-in-response-to-happy-and-angry-expressions-in-7-month-old-infants
#8
Amy Datyner, Julie D Henry, Jenny L Richmond
Humans rapidly and spontaneously activate muscles in the face when viewing emotional facial expressions in others. These rapid facial reactions (RFRs) are thought to reflect low-level, bottom-up processes, and are theorized to assist an observer to experience and share the affect of another individual. It has been assumed that RFRs are present from birth; however to date, no study has investigated this response in children younger than 3 years of age. In the present study, we used facial electromyography (EMG) to measure corrugator supercilii (brow) and zygomaticus major (cheek) muscle activity in 7-month-old infants while they viewed happy and angry facial expressions...
October 28, 2017: Developmental Psychobiology
https://www.readbyqxmd.com/read/29080098/gait-bradykinesia-in-parkinson-s-disease-a-change-in-the-motor-program-which-controls-the-synergy-of-gait
#9
Tateo Warabi, Hiroyasu Furuyama, Eri Sugai, Masamichi Kato, Nobuo Yanagisawa
This study examined how gait bradykinesia is changed by the motor programming in Parkinson's disease. Thirty-five idiopathic Parkinson's disease patients and nine age-matched healthy subjects participated in this study. After the patients fixated on a visual-fixation target (conditioning-stimulus), the voluntary-gait was triggered by a visual on-stimulus. While the subject walked on a level floor, soleus, tibialis anterior EMG latencies, and the y-axis-vector of the sole-floor reaction force were examined. Three paradigms were used to distinguish between the off-/on-latencies...
October 27, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29073175/dissociation-between-behavior-and-motor-cortical-excitability-before-and-during-ballistic-wrist-flexion-and-extension-in-young-and-old-adults
#10
Tibor Hortobágyi, Adinda Mieras, John Rothwell, Miguel Fernandez Del Olmo
PURPOSE: Aging is associated with slow reactive movement generation and poor termination. OBJECTIVE: We examined the hypothesis that the build-up of excitability in the primary motor cortex in the agonist muscle to generate ballistic wrist flexion and extension and in the antagonist to stop the movement, is lower and slower in old compared with young adults. METHODS: We measured the size of the motor potentials evoked (MEP) produced by transcranial magnetic stimulation (TMS), background integrated EMG (iEMG), and the MEP:iEMG ratio in healthy young (23 y, n = 14) and old adults' (73 y, n = 14) wrist flexors and extensors as they rapidly flexed or extended the wrist in response to an auditory cue...
2017: PloS One
https://www.readbyqxmd.com/read/29072643/-correlation-of-functional-state-of-dental-system-and-emotional-stress-in-young-adults
#11
L P Gerasimova, M F Kabirova, N S Kuznetzova, L V Farhutdinova, R R Khaibullina
The aim of the study was to evaluate correlation of dental system functional status and emotional stress level in young adults. The study involved 164 patients aged 20-25 years. TMJ dysfunction was diagnosed according to M. Ahlers and H. Jakstat criteria (2000). All patients underwent electromyography (EMG) of mastication muscles at rest and by functional test. Emotional stress and anxiety were assessed by Holmes and Rahe stress scale, Jakhin-Mendeleevich clinical questionnaire and State-Trait Anxiety Inventory...
2017: Stomatologii︠a︡
https://www.readbyqxmd.com/read/29053659/impact-of-temporomandibular-disorders-on-the-stomatognathic-system-in-children
#12
K-V Díaz-Serrano, T-M Dias, P Vasconcelos, L-G Sousa, S Siéssere, S Regalo, M Palinkas
BACKGROUND: To evaluate the EMG activity and thickness of right masseter (RM), left masseter (LM), right temporal (RT) and left temporal (LT) muscles and bite force in children with temporomandibular disorders (TMD). MATERIAL AND METHODS: Forty five children (mean age 8.8 years; 22 boys and 23 girls) were examined on the basis of the RDC/TMD and the Faces Pain Scale-Revised (FPS-R) was used to determine the level of severity of the signs and symptoms of TMD, resulting in four groups: GI - without TMD (n=10); GII - with mild TMD (n=18), GIII: with moderate TMD (n=12) and GIV: with severe TMD (n=5)...
November 1, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/29016480/revisiting-the-single-visit-protocol-for-determining-the-electromyographic-fatigue-threshold
#13
Fatin L Khan, Jordan M Lawal, Drew O Kapture, Joseph D Swingle, Moh H Malek
The electromyographic fatigue threshold (EMGFT) has been shown to demarcate between non-fatiguing and fatiguing exercise workloads. One potential limitation of incorporating the single EMGFT test in a clinical setting is the 2-min stage increment inherit to the protocol. In most rehabilitation clinics time with the client is limited and any testing procedures need to consider this factor. The purpose of this study, therefore, was to determine whether or not the estimation of the EMGFT is influenced by reducing the incremental stage to 1-min intervals...
October 7, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28988262/playing-the-clarinet-influence-of-body-posture-on-muscle-activity-and-sound-quality
#14
V Ae Baadjou, Mdf van Eijsden-Besseling, Jamcf Verbunt, R A de Bie, Rpj Geers, Rjem Smeets, Ham Seelen
Musculoskeletal complaints are highly prevalent in clarinetists and are related to high arm load while playing. It is hypothesized that postural exercise therapy may be used to adapt muscle activity patterns while playing and thus contribute to better sound quality. The goal of the present study was to investigate the relationship between body posture, muscle activity, and sound quality in clarinetists while playing the instrument in two different postures, their habitual sitting posture (control, CO) vs an experimental sitting posture (EXP) based on Mensendieck postural exercise therapy, method Samama...
September 2017: Medical Problems of Performing Artists
https://www.readbyqxmd.com/read/28984294/perinatal-immune-activation-produces-persistent-sleep-alterations-and-epileptiform-activity-in-male-mice
#15
Galen Missig, Emery L Mokler, James O Robbins, Abigail J Alexander, Christopher J McDougle, William A Carlezon
Increasing evidence suggests a role for inflammation in neuropsychiatric conditions including autism spectrum disorder (ASD). Previous work in rodents has established that immune activation during critical developmental periods can cause phenotypes that reproduce core features of ASD, including decreased social interaction, aberrant communication, and increased repetitive behavior. In humans, ASD is frequently associated with co-morbid medical conditions including sleep disorders, motor hyperactivity, and seizures...
October 6, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28981143/effect-of-very-old-age-on-anconeus-motor-unit-loss-and-compensatory-remodelling
#16
Kevin J Gilmore, Eric A Kirk, Timothy J Doherty, Charles L Rice
INTRODUCTION: It is not known how the process of compensatory remodeling through collateral reinnervation continues into very old age (>80 years) or whether there is a limit to effective motor unit (MU) reinnervation. Therefore, we explore electrophysiological properties related to motor unit number estimates (MUNEs) in very old participants (79-90 years of age) compared with young controls (25-29 years of age). METHODS: Decomposition-enhanced spike-triggered averaging was used to collect surface and intramuscular electromyography information from the anconeus to derive a MUNE...
October 5, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28975819/surgical-and-clinical-decision-making-in-isolated-long-thoracic-nerve-palsy
#17
Shelley S Noland, Emily M Krauss, John M Felder, Susan E Mackinnon
BACKGROUND: Isolated long thoracic nerve palsy results in scapular winging and destabilization. In this study, we review the surgical management of isolated long thoracic nerve palsy and suggest a surgical technique and treatment algorithm to simplify management. METHODS: In total, 19 patients who required surgery for an isolated long thoracic nerve palsy were reviewed retrospectively. Preoperative demographics, electromyography (EMG), and physical examinations were reviewed...
October 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28966227/childhood-onset-anti-3-hydroxy-3-methylglutaryl-coenzyme-a-reductase-anti-hmgcr-necrotizing-myopathy-needs-to-be-distinguished-from-muscular-dystrophy-a-case-study
#18
Yuka Hama, Madoka Mori-Yoshimura, Hirofumi Komaki, Shigeaki Suzuki, Hitoshi Kohsaka, Ichizo Nishino, Yuji Takahashi
A 24-year-old woman visited our hospital with a complaint of walking disability. She had no family history of consanguineous marriage, and her developmental history was unremarkable, with good physical performance just before the onset. At the age of 13, she developed difficulty in walking and visited a pediatrician. Her serum CK level was 10,000 IU/l and she was diagnosed with muscular dystrophy by muscle biopsy. At the age of 16, she became wheelchair dependent and was admitted to our hospital. Physical examination revealed diffuse muscle atrophy and proximal weakness, with no calf hypertrophy or selectivity of muscle involvement...
October 27, 2017: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/28949820/pilates-and-proprioceptive-neuromuscular-facilitation-methods-induce-similar-strength-gains-but-different-neuromuscular-adaptations-in-elderly-women
#19
Fabiana Teixeira de Carvalho, Laiana Sepúlveda de Andrade Mesquita, Rafael Pereira, Osmar Pinto Neto, Renato Amaro Zangaro
Background/Study Context: The aging process is associated with a decline in muscle mass, strength, and conditioning. Two training methods that may be useful to improve muscle function are Pilates and proprioceptive neuromuscular facilitation (PNF). Thus, the present study aimed to compare the influence of training programs using Pilates and PNF methods with elderly women. METHODS: Sixty healthy elderly women were randomly divided into three groups: Pilates group, PNF group, and control group...
September 26, 2017: Experimental Aging Research
https://www.readbyqxmd.com/read/28948090/predictors-of-symptomatic-myelopathy-in-degenerative-cervical-spinal-cord-compression
#20
Zdenek Kadanka, Blanka Adamova, Milos Kerkovsky, Zdenek Kadanka, Ladislav Dusek, Barbora Jurova, Eva Vlckova, Josef Bednarik
OBJECTIVES: To update a previously established list of predictors for neurological cervical cord dysfunction in nonmyelopathic degenerative cervical cord compression (NMDCCC). MATERIAL AND METHODS: A prospective observational follow-up study was performed in a cohort of 112 consecutive NMDCCC subjects (55 women and 57 men; median age 59 years, range 40-79 years), either asymptomatic (40 subjects) or presenting with cervical radiculopathy or cervical pain (72 subjects), who had completed a follow-up of at least 2 years (median duration 3 years)...
September 2017: Brain and Behavior
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