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https://www.readbyqxmd.com/read/27855311/effect-of-aging-on-regional-neuromuscular-regulation-within-human-rectus-femoris-muscle-during-stair-ascent-and-descent
#1
Kohei Watanabe, Motoki Kouzaki, Toshio Moritani
Our recent studies showed the rectus femoris (RF) muscle is regionally regulated during the level walking and this unique neuromuscular activation pattern is influenced by aging (Watanabe et al., 2014, 2016 J Biomech). We aimed to investigate and compare regional neuromuscular activation patterns along the RF muscle between the young and elderly during the stair walking. Fourteen young men (age: 20.4±1.0years) and 14 elderly men (age: 73.8±5.9years) performed the stair ascent and descent. Fifteen trials of three steps were performed for both stair ascent and descent...
November 10, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27799694/the-effect-of-intervention-according-to-muscle-contraction-type-on-the-cerebral-cortex-of-the-elderly
#2
Jeong-Il Kang, Dae-Keun Jeong, Hyun Choi
[Purpose] Here we investigated the activity of the cerebral cortex after resistance training in the elderly. We evaluated the clinical neuropsychological basis of 2 contractile types, and determined the usefulness of a movement-related cortical potential (MRCP) from an electroencephalography (EEG). [Subjects and Methods] The subjects were 11 females and 11 males aged between 65 and 70 years. The subjects were randomly assigned into a group that performed an eccentric contraction exercise (experimental group I, n=11) and a group that performed a concentric contraction exercise (experimental group II, n=11)...
September 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27720736/the-effect-of-a-crunchy-pseudo-chewing-sound-on-perceived-texture-of-softened-foods
#3
Hiroshi Endo, Shuichi Ino, Waka Fujisaki
Elderly individuals whose ability to chew and swallow has declined are often restricted to unpleasant diets of very soft food, leading to a poor appetite. To address this problem, we aimed to investigate the influence of altered auditory input of chewing sounds on the perception of food texture. The modified chewing sound was reported to influence the perception of food texture in normal foods. We investigated whether the perceived sensations of nursing care foods could be altered by providing altered auditory feedback of chewing sounds, even if the actual food texture is dull...
October 5, 2016: Physiology & Behavior
https://www.readbyqxmd.com/read/27632533/altered-emg-patterns-in-diabetic-neuropathic-and-not-neuropathic-patients-during-step-ascending-and-descending
#4
Fabiola Spolaor, Zimi Sawacha, Gabriella Guarneri, Silvia Del Din, Angelo Avogaro, Claudio Cobelli
Diabetic peripheral neuropathy (DPN) causes motor control alterations during daily life activities. Tripping during walking or stair climbing is the predominant cause of falls in the elderly subjects with DPN and without (NoDPN). Surface Electromyography (sEMG) has been shown to be a valid tool for detecting alterations of motor functions in subjects with DPN. This study aims at investigating the presence of functional alterations in diabetic subjects during stair climbing and at exploring the relationship between altered muscle activation and temporal parameter...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27616640/electromyography-evaluation-of-masseter-and-temporalis-bite-force-and-quality-of-life-in-elderly-patients-during-the-adaptation-of-mandibular-implant-supported-overdentures
#5
Mariana Vilela Sônego, Marcelo Coelho Goiato, Daniela Micheline Dos Santos
OBJECTIVES: The aim of this study was to investigate the outcomes of the installation of two implant-supported overdentures until such treatment is complete. Although this treatment is well established in the literature, there are no studies comparing what happens to muscles and the quality of life (QoL) of patients during the treatment. METHODS: We selected 13 completely edentulous patients, according to inclusion and exclusion criteria, to rehabilitate with mandibular overdentures retained by two dental implants and a complete denture as antagonists...
September 11, 2016: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/27534548/modulation-of-upper-esophageal-sphincter-ues-relaxation-and-opening-during-volume-swallowing
#6
Charles Cock, Corinne A Jones, Michael J Hammer, Taher I Omari, Timothy M McCulloch
UES opening occurs following cricopharyngeus deactivation and submental muscle contraction causing hyolaryngeal elevation and UES distraction. During impedance manometry, the inverse of impedance (admittance) can be used to measure bolus presence and infer UES opening. We hypothesized that the temporal relationship between UES relaxation, opening and hyolaryngeal elevation would change with increasing bolus volume. Simultaneous intramuscular cricopharyngeal (CP) electromyography (EMG), surface submental EMG (SM-EMG), and high-resolution impedance manometry were recorded in eight (aged 27 ± 7 years, 5 M) healthy volunteers, while swallowing 0...
August 17, 2016: Dysphagia
https://www.readbyqxmd.com/read/27446781/emg-activity-of-masseter-muscles-in-the-elderly-according-to-rheological-properties-of-solid-food
#7
Au Jin Kang, Don-Kyu Kim, Si Hyun Kang, Kyung Mook Seo, Hyoung Su Park, Ki-Hwan Park
OBJECTIVE: To assess the impact of aging on masticatory muscle function according to changes in hardness of solid food. METHODS: Each of fifteen healthy elderly and young people were selected. Subjects were asked to consume cooked rice, which was processed using the guidelines of the Universal Design Foods concept for elderly people (Japan Care Food Conference 2012). The properties of each cooked rice were categorized as grade 1, 2, 3 and 4 (5×10(3), 2×10(4), 5×10(4), and 5×10(5) N/m(2)) respectively...
June 2016: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/27189591/effects-of-age-and-sex-on-neuromuscular-mechanical-determinants-of-muscle-strength
#8
Rui Wu, Eamonn Delahunt, Massimiliano Ditroilo, Madeleine Lowery, Giuseppe De Vito
The aim of this study was to concurrently assess the effect of age on neuromuscular and mechanical properties in 24 young (23.6 ± 3.7 years) and 20 older (66.5 ± 3.8 years) healthy males and females. Maximal strength of knee extensors (KE) and flexors (KF), contractile rate of torque development (RTD) and neural activation of agonist-antagonist muscles (surface EMG) were examined during maximal voluntary isometric contraction (MVIC). Tissue stiffness (i.e. musculo-articular stiffness (MAS) and muscle stiffness (MS)) was examined via the free-oscillation technique, whereas muscle architecture (MA) of the vastus lateralis and subcutaneous fat were measured by ultrasonography...
June 2016: Age (2005-)
https://www.readbyqxmd.com/read/27177097/forward-and-inverse-dynamic-study-during-pedaling-comparison-between-the-young-and-the-elderly
#9
Jeongwoo Seo, Jinseung Choi, Dongwon Kang, Seungtae Yang, Daehyeok Kim, Gyerae Tack
BACKGROUND: As it is not easy to investigate various variables that affect exercise efficacies and cause injuries while pedaling in the actual experiment, especially for the elderly, the musculoskeletal model simulation with a comparison of measured electromyography (EMG) data could be used to minimize experimental trials. OBJECTIVE: The measured EMG data were compared with the muscle activities from the musculoskeletal model through forward (FD) and inverse dynamic (ID) analysis...
April 29, 2016: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/27105700/the-effect-of-vertical-whole-body-vibration-on-lower-limb-muscle-activation-in-elderly-adults-influence-of-vibration-frequency-amplitude-and-exercise
#10
Freddy M H Lam, L R Liao, Timothy C Y Kwok, Marco Y C Pang
OBJECTIVE: This study aimed to investigate how whole-body vibration (WBV) and exercise and their interactions influenced leg muscle activity in elderly adults. STUDY DESIGN: An experimental study with repeated measures design that involved a group of ambulatory, community-dwelling elderly adults (n=30; 23 women; mean age=61.4±5.3years). MAIN OUTCOME MEASURES: Muscle activity of the vastus lateralis (VL), biceps femoris (BF), tibialis anterior (TA), and gastrocnemius (GS) was measured by surface electromyography (EMG), while participants were performing seven different exercises during 4 WBV conditions (condition 1: frequency=30Hz, amplitude=0...
June 2016: Maturitas
https://www.readbyqxmd.com/read/26963478/a-method-for-early-detection-of-the-initiation-of-sit-to-stand-posture-transitions
#11
Abul Doulah, Xiangrong Shen, Edward Sazonov
A powered lower extremity orthotic brace can potentially be used to assist frail elderly during daily activities. This paper presents a method for an early detection of the initiation of sit-to-stand (SiSt) posture transition that can be used in the control of the powered orthosis. Unlike the methods used in prosthetic devices that rely on surface electromyography (EMG), the proposed method uses only sensors embedded into the orthosis brace attached to the limb. The method was developed and validated using data from a human study with 10 individuals...
April 2016: Physiological Measurement
https://www.readbyqxmd.com/read/26909030/the-effects-of-tai-chi-practice-on-intermuscular-beta-coherence-and-the-rubber-hand-illusion
#12
Catherine E Kerr, Uday Agrawal, Sandeep Nayak
Tai Chi (TC) is a slow-motion contemplative exercise that is associated with improvements in sensorimotor measures, including decreased force variability, enhanced tactile acuity, and improved proprioception, especially in elderly populations. Here, we carried out two studies evaluating the effect of TC practice on measures associated with sensorimotor processing. In study 1, we evaluated TC's effects on an oscillatory parameter associated with motor function, beta rhythm (15-30 Hz) coherence, focusing specifically on beta rhythm intermuscular coherence (IMC), which is tightly coupled to beta corticomuscular coherence (CMC)...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/26899564/the-involvement-of-ankle-muscles-in-maintaining-balance-in-the-upright-posture-is-higher-in-elderly-fallers
#13
T Cattagni, G Scaglioni, D Laroche, V Gremeaux, A Martin
The purpose of this study was to determine whether the mechanical contribution of ankle muscles in the upright stance differed among young adults (YA) (n=10, age: ~24.3), elderly non-fallers (ENF) (n=12, age: ~77.3) and elderly fallers (EF) (n=20, age: ~80.7). Torque and electromyographic (EMG) activity were recorded on the triceps surae and tibialis anterior during maximum and submaximum contractions in the seated position. EMG activity was also recorded in subjects standing still. Plantar flexor (PF) and dorsal flexor (DF) torques generated in the upright posture were estimated from the torque-EMG relationship obtained during submaximum contractions in the seated position...
May 2016: Experimental Gerontology
https://www.readbyqxmd.com/read/26737681/age-related-motor-unit-remodeling-in-the-tibialis-anterior
#14
Ariba Siddiqi, Dinesh Kumar, Sridhar Arjunan
Limited studies exist on the use of surface electromyogram (EMG) signal features to detect age-related motor unit remodeling in the Tibialis Anterior. Motor unit remodeling leads to declined muscle strength and force steadiness during submaximal contractions which are factors for risk of falls in the elderly. This study investigated the remodeling phenomena in the Tibialis Anterior using sample entropy and higher order statistics. Eighteen young (26.1 ± 2.9 years) and twelve elderly (68.7 ± 9.0 years) participants performed isometric dorsiflexion of the ankle at 20% maximal voluntary contraction (MVC) and their Tibialis Anterior (TA) EMG was recorded...
2015: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/26714981/effects-of-photobiomodulation-on-the-fatigue-level-in-elderly-women-an-isokinetic-dynamometry-evaluation
#15
P G Vassão, R L Toma, H K M Antunes, H T Tucci, A C M Renno
Aging is responsible by a series of morphological and functional modifications that lead to a decline of muscle function, particularly in females. Muscle tissue in elderly people is more susceptible to fatigue and, consequently, to an increased inability to maintain strength and motor control. In this context, therapeutic approaches able of attenuating muscle fatigue have been investigated. Among these, the photobiomodulation demonstrate positive results to interacts with biological tissues, promoting the increase in cell energy production...
February 2016: Lasers in Medical Science
https://www.readbyqxmd.com/read/26684024/muscle-fiber-conduction-velocity-and-fractal-dimension-of-emg-during-fatiguing-contraction-of-young-and-elderly-active-men
#16
Gennaro Boccia, Davide Dardanello, Matteo Beretta-Piccoli, Corrado Cescon, Giuseppe Coratella, Nicoletta Rinaldo, Marco Barbero, Massimo Lanza, Federico Schena, Alberto Rainoldi
Over the past decade, linear and nonlinear surface electromyography (EMG) variables highlighting different components of fatigue have been developed. In this study, we tested fractal dimension (FD) and conduction velocity (CV) rate of changes as descriptors, respectively, of motor unit synchronization and peripheral manifestations of fatigue. Sixteen elderly (69  ±  4 years) and seventeen young (23  ±  2 years) physically active men (almost 3-5 h of physical activity per week) executed one knee extensor contraction at 70% of a maximal voluntary contraction for 30 s...
January 2016: Physiological Measurement
https://www.readbyqxmd.com/read/26610353/regional-neuromuscular-regulation-within-human-rectus-femoris-muscle-during-gait-in-young-and-elderly-men
#17
Kohei Watanabe, Motoki Kouzaki, Toshio Moritani
Recently, we demonstrated region-specific electromyography (EMG) responses along the rectus femoris (RF) muscle during gait in healthy young men (Watanabe et al., 2014b). For the RF muscle, regional EMG response should be tested to characterize neuromuscular control and/or to assess its dysfunction and/or pathology during gait. We aimed to identify spatial distribution of EMG pattern within the RF muscle in elderly during gait. Seven young men (age: 20.4±1.0 years) and 8 elderly men (age: 73.8±5.9 years) walked on treadmill with three different speed: slow (preferred -1km/h), preferred, and fast (preferred +1km/h)...
January 4, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/26544817/pudendal-neuropathy-alone-results-in-urge-incontinence-rather-than-in-complete-fecal-incontinence
#18
COMPARATIVE STUDY
Maxime M van Meegdenburg, Erik Heineman, Paul M A Broens
BACKGROUND: Conscious external anal sphincter contraction is mediated by the pudendal nerve. Pudendal neuropathy is, therefore, believed to result in fecal incontinence. Until urge sensation is experienced, fecal continence is maintained by unconscious external anal sphincter contraction, which is regulated by the anal-external sphincter continence reflex. The innervation of unconscious contraction is yet unknown. OBJECTIVE: We aimed to determine whether unconscious contraction is mediated by the pudendal nerve and whether age influences unconscious contraction...
December 2015: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/26385200/postural-stability-and-the-influence-of-concurrent-muscle-activation-beneficial-effects-of-jaw-and-fist-clenching
#19
COMPARATIVE STUDY
Steffen Ringhof, Timo Leibold, Daniel Hellmann, Thorsten Stein
Recent studies reported on the potential benefits of submaximum clenching of the jaw on human postural control in upright unperturbed stance. However, it remained unclear whether these effects might also be observed among active controls. The purpose of the present study, therefore, was to comparatively examine the influence of concurrent muscle activation in terms of submaximum clenching of the jaw and submaximum clenching of the fists on postural stability. Posturographic analyses were conducted with 17 healthy young adults on firm and foam surfaces while either clenching the jaw (JAW) or clenching the fists (FIST), whereas habitual standing served as the control condition (CON)...
October 2015: Gait & Posture
https://www.readbyqxmd.com/read/26157253/effects-of-combined-exercise-on-changes-of-lower-extremity-muscle-activation-during-walking-in-older-women
#20
Jaehyun Park, Joongsook Lee, Jeongok Yang, Bomjin Lee, Dongwook Han
[Purpose] The purpose of this study was to demonstrate the effects of combined exercise for a period of 12 weeks on the changes in lower extremity muscle activation during walking in older women. [Subjects] The subjects of this study were 22 elderly women who were 65 years of age or older and living in B-City. The subjects had no nervous system or muscular system diseases that might affect walking in the previous two years. [Methods] Muscle activation was measured by using surface EMG (QEMG-8, Laxtha, Daejeon, Republic of Korea)...
May 2015: Journal of Physical Therapy Science
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