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J Electromyogr Kinesiol 2018 Nov 28;44:64-69. Epub 2018 Nov 28.

Research Center of Health, Physical Fitness & Sports, Nagoya University, Nagoya, Japan; Graduate School of Education and Human Development, Nagoya University, Nagoya, Japan.

We aimed to test the hypothesis that the magnitude of differences in muscle activation of the knee and hip extensor muscles between high-intensity interval exercise (HIE) and moderate-intensity constant exercise (CE) would be greater for the gluteus maximus than for the quadriceps femoris muscle. Participants were 11 male middle- or long-distance runners. The HIE (4 sets, 4-min induration, performed at 80-85%VO and followed by a 3-min period of cycling at < 30%VO) and CE (28-min, performed at or near 60%VO) were completed on different days, with the total exercise duration and work being identical for both protocols. Read More

Acta Bioeng Biomech 2018 ;20(4):123-131

Department of Kinesiology, Faculty of Physiotherapy, University School of Physical Education, Wrocław, Poland.

Purpose: The aim of this study was to determine an effect of myotonometric records' number on stiffness measurements' reliability in muscles at rest and contraction.

Methods: Muscle stiffness was measured using Myoton-3 device. Twenty records were taken for: (i) biceps (BB) and triceps brachii (TB) at rest and for BB at 10% of maximal voluntary contraction (MVC) in healthy elderlies (HE) and in Parkinson's disease patients (PD); and (ii) brachioradialis (BR) at rest and at 25, 50 and 80% MVC in healthy young (HY) subjects. Read More

Med Probl Perform Art 2018 Dec;33(4):231-237

Faculty of Physical Activity and Sport Sciences, Universidad Católica de Valencia, Ramiro de Maeztu 14, 46900 Torrent, Spain. Tel +34963637412.

Dancers are subjected to high-intensity workouts when they practice dancesport, and according to the literature, they are prone to injury, primarily of the lower limbs. The purpose of this study was to determine whether differences exist in relative activation amplitudes for dancers involved in dancesport due to muscle, gender, and type of dance. Measurements were carried out using surface electromyography equipment during the choreography of a performance in the following leg muscles: rectus femoris, biceps femoris, tibialis anterior, and gastrocnemius medialis. Read More

J Back Musculoskelet Rehabil 2018 Nov 23. Epub 2018 Nov 23.

Department of Rehabilitation Medicine, Daegu Veterans Health Service Medical Center, Daegu, Korea.

Background And Objective: Calcific tendinitis is commonly found in the rotator cuff; however, it is very rare in the long biceps tendon (LBT). Furthermore, calcific tendinitis involving the LBT in the hemiplegic shoulder after a stroke has not been previously reported.

Materials And Method: We present a case of a 63-year-old man who suffers from a stroke and atypical calcific tendinitis involving the LBT as a rare cause of hemiplegic shoulder pain. Read More

J Wildl Dis 2018 Dec 3. Epub 2018 Dec 3.

7 Dirección General de Medio Ambiente, Junta de Extremadura, Avda. de Luis Ramallo s/n, 06800 Mérida (Badajoz), Spain.

A free-ranging Iberian lynx ( Lynx pardinus) was found dead after 16 mo of being reintroduced. On gross necropsy, necrotic areas in the left biceps femoris and intercostal muscles were identified. Streptococcus canis was isolated from both groups of muscles and was confirmed by PCR, corroborating a necrotizing myositis diagnostic. Read More

Orthop J Sports Med 2018 Nov 27;6(11):2325967118810523. Epub 2018 Nov 27.

Division of Orthopaedic Surgery, McGill University Health Centre, Montreal, Quebec, Canada.

Background: Current repair techniques using cortical button fixation cannot achieve anatomic reconstruction of the distal biceps when performed through a single-incision anterior approach. We recently introduced a single-incision technique that uses flexible guide pins and flexible reamers to allow for an insertion point on the tuberosity that more closely approximates the anatomic footprint of the distal biceps.

Purpose: To investigate the safety of this technique with regard to nerve injury by comparing the guide pin position relative to the posterior interosseous nerve in 16 cadaveric elbows through use of a flexible versus rigid reamer. Read More

Indian J Plast Surg 2018 May-Aug;51(2):137-144

Department of Plastic Surgery, Bombay Hospital and Institute of Medical Sciences, Mumbai, Maharashtra, India.

Objective: To study the correlation of compound muscle action potential of donor nerves with the recovery of elbow flexion in Oberlin transfer in brachial plexus injury.

Introduction: Distal nerve transfer using motor fascicle of ulnar or median nerve to restore elbow flexion is a part of reconstructive surgery after upper brachial plexus injury, first described by Oberlin . However, one of the most critical influences on functional outcome is number of functioning motor axons in donor fascicle which is reflected by its compound muscle action potential. Read More

Clinics (Sao Paulo) 2018 Nov 29;73:e438. Epub 2018 Nov 29.

Divisao de Endocrinologia, Universidade Federal do Triangulo Mineiro, Uberaba, MG, BR.

Objectives: The objective of this study was to describe the prevalence of overweight and obesity in school children and adolescents in a medium-sized Brazilian city.

Methods: In total, 1,125 children and adolescents between the ages of 5.6 and 18 years from public and private schools participated in the study. Read More

Artif Cells Nanomed Biotechnol 2018 Dec 4:1-12. Epub 2018 Dec 4.

a Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory , Ankara University Faculty of Science, and Ankara University Stem Cell Institute , Ankara , Turkey.

Repair of volumetric muscle loss (VML) injuries is a complicated endeavour which necessitates the collaborative use of different regenerative approaches and technologies. Herein is proposed the development of fibrin-based microbeads (FMs) alone or as a bone marrow mesenchymal stem cell (MSC) encapsulation matrix for modular muscle engineering. FMs were generated through the ionotropic gelation of alginate and fibrinogen obtained from the platelet-rich plasma of whole blood, and then removing the alginate by citrate treatment. Read More

J Musculoskelet Neuronal Interact 2018 Dec;18(4):446-462

School of Mechatronic Engineering, Universiti Malaysia Perlis (UniMAP), Malaysia.

This systematic review aims to categorically analyses the literature on the assessment of biceps brachii (BB) muscle activity through mechanomyography (MMG). The application of our search criteria to five different databases identified 319 studies. A critical review of the 48 finally selected records, revealed the diversity of protocols and parameters that are employed in MMG-based assessments of BB muscle activity. Read More

Appl Ergon 2019 Feb 21;75:91-98. Epub 2018 Sep 21.

Department of Biomedical Systems & Medical Physics, Tehran University of Medical Sciences, Iran.

Nursing is a physically demanding job characterized by a high prevalence of fatigue and musculoskeletal disorders. One of the high-exertion and repetitive nursing tasks is the manual connection of an infusion set to a medical fluid bottle. Such physical work can be eased by the design of new hand tools. Read More

Res Vet Sci 2018 Nov 12;122:118-123. Epub 2018 Nov 12.

School of Veterinary Medicine and Animal Science, University Estadual Paulista, Prof. Doutor Walter Mauricio Correa street, s/n, Unesp Campus de Botucatu, 18618-681, Rubião Jr., Botucatu, São Paulo, Brazil.

This study aimed to assess the influence of WBV exercise on muscles by means of infrared thermography and on resistive index (RI) of the femoral artery. The hypothesis was that WBV exercise protocol will induce increase of the muscle activity detected through skin surface temperature change and decreased of RI with WBV exercise. Ten adult healthy medium dogs, were submitted to WBV session. Read More

Int Orthop 2018 Nov 29. Epub 2018 Nov 29.

Department of Orthopaedic Surgery, Columbia University, New York, NY, USA.

Although relatively rare, post-operative nerve injuries may occur after cervical spine procedures. The most common post-operative neural disorder is C5 nerve palsy. The risk factors for C5 nerve palsy are male gender, OPLL, and posterior cervical approaches. Read More

Case Rep Orthop 2018 25;2018:6374784. Epub 2018 Oct 25.

Department of Orthopaedics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.

Tuberculous distal biceps tendon rupture is a rare condition in orthopedics. Musculoskeletal tuberculosis usually presents with bursitis, synovitis, myositis, and osteomyelitis, conditions which demonstrate an excellent response to antituberculosis chemotherapy. Tendon rupture is often associated with delayed diagnosis and treatment. Read More

J Electromyogr Kinesiol 2018 Nov 19;44:36-45. Epub 2018 Nov 19.

School of Health Sciences, University of Central Lancashire, Preston, Lancashire, United Kingdom.

Kinesiology-type tape (KTT) has become popular in sports for injury prevention, rehabilitation, and performance enhancement. Many cyclists use patella KTT; however, its benefits remain unclear, especially in uninjured elite cyclists. We used an integrated approach to investigate acute physiological, kinematic, and electromyographic responses to patella KTT in twelve national-level male cyclists. Read More

PLoS One 2018 29;13(11):e0205226. Epub 2018 Nov 29.

INEFC-Barcelona Sports Sciences Research Group, Institut Nacional d'Educació Física de Catalunya (INEFC), University of Barcelona, Barcelona, Spain.

Purpose: This study compared subcutaneous adipose tissue (SAT) measurements using a skinfold caliper and Renco Lean-Meater Series 12 A-mode portable ultrasound scanner (A-US). It aimed to assess their inter- and intra-rater reliability and measure the agreement between both methods.

Methods: Eighty-four volunteers of different fitness levels were divided into three groups by Ʃ6 skinfolds: G1 ≤ 55 mm (n = 33 males); G2 > 55 mm (n = 32 males); G3 = 98. Read More

JBJS Case Connect 2018 Nov 28. Epub 2018 Nov 28.

Western Orthopaedics, Denver, Colorado.

Case: A 49-year-old right-hand-dominant man sustained an auger-related injury that resulted in open dislocation at the left wrist and palm, with complete amputation of the distal aspect of the forearm and the hand. The injury at the elbow included instability with an ulnar coronoid fracture, posterior dislocation of the ulna, and posterolateral dislocation of the radius. To restore stability of the forearm stump and elbow, we performed a complete resection of the radius, open reduction and internal fixation of the coronoid tip, a repair of the lateral collateral ligament, and transfer of the distal biceps tendon to the coronoid. Read More

Sports (Basel) 2018 Nov 28;6(4). Epub 2018 Nov 28.

Faculdade de Educação Física e Dança, Universidade Federal de Goiás, Goiânia 74690-900, Brazil.

Background: The present study's aim was to compare the changes in muscle performance and anthropometric measures in trained women performing RT programs composed only of MJ exercises or programmes that involve the addition of SJ exercises.

Methods: Seventeen trained women were randomised to MJ or MJ+SJ. Both groups performed the same MJ exercises following a nonlinear periodisation model for 8 weeks. Read More

Orthop J Sports Med 2018 Nov 6;6(11):2325967118807131. Epub 2018 Nov 6.

Department of Orthopaedic Surgery, Wellstar Atlanta Medical Center, Atlanta, Georgia, USA.

Background: Dynamic compressive neuropathies around the elbow are a rare entity described by a relatively small body of literature, mostly consisting of single-case reports. No standardized diagnostic protocols have been described to date. To the authors' knowledge, this study represents the largest case series of dynamic compressive neuropathies in the upper extremity. Read More

J Sports Sci Med 2018 Dec 20;17(4):650-655. Epub 2018 Nov 20.

Graduate School of Health and Sport Sciences, Chukyo University, Aichi, Japan.

Hamstring strain injury is a multifactorial and complex problem involving interactions among various factors. Information about risk factors for this injury is inconsistent among studies because the strong effects of confounding factors and injury situations are often ignored. We investigated the relationship between hamstring strain induced by high-speed running and intrinsic risk factors, including hip muscle morphology and function, by excluding the influences of confounding factors. Read More

J Sports Sci Med 2018 Dec 20;17(4):599-606. Epub 2018 Nov 20.

Physical Education and Sports Science Academic Group, National Institute of Education, Nanyang Technological University, Singapore.

It is commonly believed that massage can reduce muscle stiffness and is desirable for recovery from exercise. However, the effect massage on muscle stiffness following eccentric exercises is currently unknown. This study aimed to examine the effect of post-exercise massage on passive muscle stiffness over a five-day period. Read More

JBJS Essent Surg Tech 2015 Sep 12;5(3):e15. Epub 2015 Aug 12.

Department of Traumatology and Orthopaedics, Stadtspital Waid, Tieche Strasse 99, 8037 Zurich, Switzerland. E-mail address for M. Dietrich:

Introduction: We describe the surgical technique for open reduction and internal fixation (ORIF) of proximal humeral fractures with a locking plate.

Step 1 Preoperative Planning: To choose the right candidate, obtain a full understanding of the patient's fracture pattern, activity level and demands, and bone quality; be aware of predictors of complications and poor outcomes.

Step 2 Patient Positioning: Place the patient in the beach-chair position with the arm draped free or in a hydraulic device with good access for the image intensifier. Read More

JBJS Essent Surg Tech 2015 Sep 22;5(3):e14. Epub 2015 Jul 22.

Department of Orthopedic Surgery, Seoul St. Mary's Hospital, The Catholic University of Korea, 505 Banpo-dong, Seocho-gu, Seoul 137-701, South Korea. E-mail address for Y-S. Kim: E-mail address for H-J. Lee:

Introduction: Among many treatments for shoulder stiffness, which is a common debilitating condition, arthroscopic capsular release is an effective surgical method for patients who have not responded to conservative treatment, as it provides visual control of the capsular release with a lower risk of potential traumatic damage than manipulation under anesthesia.

Step 1 Position The Patient: Place the patient either in the lateral decubitus position or in the beach-chair position, depending on one's preference.

Step 2 Portal Placement: Create a standard posterior viewing portal, an anterior portal, and a lateral portal for approaching the glenohumeral joint and the subacromial space. Read More

Eur J Neurosci 2018 Nov 25. Epub 2018 Nov 25.

Radboud University Nijmegen, Donders Institute for Brain, Cognition and Behaviour, The Netherlands.

Feedback corrections in reaching have been shown to be task-dependent for proprioceptive, visual and vestibular perturbations, in line with predictions from optimal feedback control theory. Mechanical perturbations have been used to elicit proprioceptive errors, but have the drawback to actively alter the limb's trajectory, making it non-trivial to dissociate the subject's compensatory response from the perturbation itself. In contrast, muscle vibration provides an alternative tool to perturb the muscle afferents without changing the hands trajectory, inducing only changes in the estimated, but not the actual, limb position and velocity. Read More

Clin Neurophysiol 2018 Oct 31;130(1):12-19. Epub 2018 Oct 31.

Academic Center for Epileptology Kempenhaeghe, Sterkselseweg 65, 5591 VE Heeze, The Netherlands.

Objective: Fibromyalgia (FM) is characterized by widespread muscle pain and central neural deregulation. Previous studies showed increased muscle fiber conduction velocity (CV) in non-painful muscles of FM patients. This study investigates the relationship between central activation and the CV in FM. Read More

Sci Rep 2018 Nov 23;8(1):17284. Epub 2018 Nov 23.

IGOID Research Group, University of Castilla-La Mancha, Toledo, Spain.

The aim of this study was to evaluate the effect of a repeated sprint ability (RSA) test on the contractile properties of the muscles in elite futsal players. A total of 20 elite players completed the RSA test (7 × 30 m), and the contractile response from the rectus femoris (RF) and biceps femoris (BF) of both legs were analysed pre and post through tensiomyography. There was a significant increment in 30-m times from the third sprint onwards (p < 0. Read More

Gait Posture 2018 Nov 13;68:88-94. Epub 2018 Nov 13.

The Józef Piłsudski University of Physical Education, Faculty of Rehabilitation, Marymoncka 34, Warsaw, 00-968, Poland.

Background: Pathological movement patterns are characterized by abnormal kinematics, kinetics and muscle activations that alter the distribution of muscle forces during walking.

Aim: The objective of this study was to identify what compensatory strategy is evident in muscle force distribution in patients with drop-foot, in response to weakness in the dorsiflexor muscles.

Methods: A sample of 10 patients with drop-foot were evaluated by a computerized gait analysis system and compared to a group of 10 healthy subjects. Read More

Appl Physiol Nutr Metab 2018 Nov 23. Epub 2018 Nov 23.

Memorial University of Newfoundland , School of Human Kinetics , St. Johns, Newfoundland and Labrador, Canada , A1C 5S7 ;

Crossover and non-local muscle fatigue (NLMF) has generally focused on large muscle groups. It is unclear whether fatigue of a small muscle can result in NLMF of a larger muscle. The purpose of the present study was to examine the effect of small muscle (first dorsal interosseous; FDI) fatigue on the force and activation of contralateral homologous and larger heterologous muscles (biceps brachii, BB). Read More

Clin Drug Investig 2018 Nov 21. Epub 2018 Nov 21.

Pharmacovigilance and Epidemiology Department, European Medicines Agency, London, UK.

Background And Objective: Tendon rupture can result from fluoroquinolone exposure. The objective of this study was to quantify relative and absolute risk and determine how risk is affected by timing of exposure.

Methods: The UK Health Improvement Network primary care database was used to perform a nested case-control study measuring the association between fluoroquinolone exposure and tendon rupture. Read More

J Phys Ther Sci 2018 Nov 6;30(11):1381-1385. Epub 2018 Nov 6.

Department of Rehabilitation Medicine, Fukui General Hospital, Japan.

[Purpose] The aim of this study was to clarify the optimal timing for increasing muscle activity in the paralyzed lower limb of stroke survivors by evaluating the relationship between gait muscle activity patterns and gait parameters. [Participants and Methods] Electromyography of the tibialis anterior, soleus, rectus femoris, and biceps femoris on the paralyzed side and spatiotemporal gait parameters were evaluated in 40 chronic post-stroke patients as they walked at a comfortable speed. The normalized average amplitude and asymmetry indexes of each gait phase were calculated. Read More

J Anim Sci Biotechnol 2018 15;9:82. Epub 2018 Nov 15.

2Department of Animal Sciences, Washington State University, Pullman, WA 99164 USA.

Background: Vitamin A and its metabolite, retinoic acid (RA), are important regulators of cell differentiation and organ morphogenesis. Its impact on beef cattle muscle growth remains undefined.

Method: Angus steer calves were administrated with 0 (control) or 150,000 IU vitamin A (retinyl palmitate in glycerol, i. Read More

J Clin Densitom 2018 Oct 25. Epub 2018 Oct 25.

Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory, The University of Mississippi, University, MS, USA. Electronic address:

Introduction/background: To determine the influence of ultrasound probe tilt on reliability and overall changes in muscle thickness and echo-intensity.

Materials And Methods: Thirty-six individuals had a total of 15 images taken on both the biceps brachii and tibialis anterior muscles. These images were taken in 2° increments with the probe tilted either upward (U) or downward (D) from perpendicular (0°) to the muscle (U6°, U4°, U2°, 0°, D2°, D4°, and D6°). Read More

J Ultrason 2018 ;18(74):234-239

Oxford University and St Lukes Radiology Oxford Ltd, Oxford, UK.

Diagnosis is crucial in decision-making when treating a patient with shoulder pain. Ultrasound is also very important in the diagnostic and therapeutic pathway, especially when surgery is being considered. This article outlines the diagnostic pathway using the patient's history, physical examination and ultrasound examination. Read More

J Clin Orthop Trauma 2018 Oct-Dec;9(4):312-316. Epub 2017 Oct 7.

Department of Radiology, University of Miami Miller School of Medicine, Jackson Memorial Hospital, Miami, FL, United States.

Maintaining anterolateral rotational stability of the knee requires a complex set of structures, most notably the anterior cruciate ligament. However, lateral knee structures such as the anterolateral ligament (ALL) also play an important role. There has been controversy over the role the ALL plays in an ACL deficient knee to maintain rotational stability. Read More

J Electromyogr Kinesiol 2018 Nov 9;44:1-7. Epub 2018 Nov 9.

School of Rehabilitation and Communication Sciences, Division of Physical Therapy, Ohio University, USA.

Time to task failure (TTF) on the Sørensen test predicts low back pain (LBP), but mechanisms driving TTF may vary in those with and without recurrent LBP. To determine the physiological and psychological predictors of TTF, 48 sex, age, and BMI matched participants (24 Healthy, 24 LBP) completed psychological surveys, maximal strength assessments, and the Sørensen test. A two-way ANOVA revealed no significant effects of group (p = 0. Read More

Skeletal Radiol 2018 Nov 16. Epub 2018 Nov 16.

Orthopaedic Department, Chiltern Hospital, Great Missenden, UK.

Objective: To describe and evaluate the outcome following shoulder manipulation under rotator interval block for the treatment of adhesive capsulitis.

Materials And Methods: Patients with adhesive capsulitis referred by our local orthopaedic shoulder surgeons consented to targeted ultrasound-guided injection of the glenohumeral joint via the rotator interval. Inclusion criteria included a failure to respond to conservative treatment and the absence of a full-thickness rotator cuff tear. Read More

J Hand Surg Am 2018 Nov 13. Epub 2018 Nov 13.

Department of Orthopedic Surgery, The Rothman Institute, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA. Electronic address:

Purpose: The reported incidence of postoperative complications after distal biceps tendon repairs (DBTRs) has been determined largely by retrospective studies. We hypothesized that a large prospective cohort study of DBTRs would demonstrate increased complication rates relative to existing literature values. Secondarily, we hypothesized that most complications would be transient and self-limiting, regardless of the surgical technique employed for the repair. Read More

Clin Orthop Relat Res 2018 Nov 5. Epub 2018 Nov 5.

D. Becker, N. Hammer, Anatomy Department, University of Otago, Dunedin, New Zealand F. A. Lopez-Marambio, Hamilton Hospital, Hamilton, New Zealand N. Hammer, Department of Orthopedic and Trauma Surgery, University of Leipzig, Germany Fraunhofer IWU, Dresden, Germany D. Kieser, Orthopaedics Department, Christchurch Public Hospital, Christchurch, New Zealand.

Background: The posterior interosseous nerve (PIN) is occasionally damaged during distal biceps tendon repair. But to our knowledge, no studies have examined the position of the PIN in relation to the bicipital tuberosity in full supination, which is the recommended position during single-incision distal biceps repair or reconstruction QUESTIONS/PURPOSES: (1) What is the anterior safe zone when exposing the anterior tuberosity with the arm in supination? (2) When drilling the radial tuberosity for bicortical button placement in full supination, how should the drill be angled to avoid PIN injury?

Methods: Fifteen adult cadaver elbows had the PIN dissected around the proximal radius. The position of the PIN was measured relative to the most ulnar aspect of the radius at three sites in full supination: at the bicipital tuberosity (bicipital tuberosity-PIN), 10 mm proximal to the bicipital tuberosity (bicipital tuberosity-proximal), and 10 mm distal to the bicipital tuberosity (bicipital tuberosity-distal). Read More

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:5970-5973

We analyzed the sensitivity of Non-negative Matrix Factorization (NMF) of dynamic surface electromyograms (EMG) to muscle shortening. We first identified Motor unit action potentials (MUAPs) by decomposing experimentally recorded EMG signals during slow shortening of biceps brachii muscle in five young healthy males. We then used these MUAPs to generate different synthetic EMG signals with different muscle shortening and excitation profiles. Read More

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:5966-5969

It has been widely accepted that the central nervous system (CNS) modulates muscle synergies to simplify motion control. However, it is still unclear that if there is a synergistic recruitment strategy to organize oscillation components of surface electromyography (sEMG) signals for limb movement. The sEMG signals were recorded from bilateral biceps brachii (BB) and triceps brachii (TB) muscles during infant crawling. Read More

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:5656-5659

Modelling and analysis of surface Electromyogram (sEMG) signal has gained increasing attention in bio-signal processing for medical and healthcare applications. This research reports the study to examine the complexity in surface electromyogram signal measured from different muscles to identify the properties of muscles. Experiments were conducted to study the properties of the four muscle groups representing four sizes in length and complexities: Zygomaticus (facial), biceps, quadriceps and flexor digitorum superficialis (FDS). Read More

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:5648-5651

Median frequency (MDF) is widely used for detection and tracking of muscle fatigue using surface electromyography (sEMG). However, MDF does not behave consistently or accurately distinguish fatigued from non-fatigued states. In this paper, we study the concept of low-level fatigue and propose increasing average ratio (IAR) and trigger pattern index (TPI) based on discrete wavelet transform (DWT) for distinguishing low-level muscle fatigue. Read More

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:4705-4709

A central challenge for myoelectric limb prostheses resides in the fact that, as the level of amputation becomes more proximal, the number of functions to be replaced increases, while the number of muscles available to collect input signals for control decreases. Differential activation of compartments from a single muscle could provide additional control sites. However, such feat is not naturally under voluntary control. Read More

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:4693-4696

Botulinum toxin (BT) is widely prescribed by physicians for managing spasticity post stroke. In an ongoing study, we examine the spatial pattern of muscle activity in biceps brachii of stroke survivors before and after receiving BT, examined over the course of 11 weeks (2 weeks before - 9 weeks after). We hypothesize that BT alters muscle electrophysiology by disrupting fiber neuromuscular transmission in an inhomogeneous manner and we seek to detect these changes using grid surface electromyography (sEMG). Read More

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:2659-2662

Muscle fatigue is the inability to exert the required force. Surface Electromyography (sEMG) is a technique used to study the muscle's electrical property. These generated signals are complex and nonstationary in nature. Read More

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:2470-2474

Deweighting of the limb is commonly performed for patients with a neurological injury, such as stroke, as it allows these patients with limited muscle activity to perform movements. Deweighting has been implemented in exoskeletons and other multi-contact devices, but not on an end-effector based device with single contact point between the assisting robot and the human limb being assisted. This study inves-tigates the effects of deweighting using an end-effector based device on healthy subjects. Read More

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:2325-2328

In this study we developed a technique for identifying noisy electrodes in high density surface electromyography (HD-sEMG). The technique finds the spatial similarity of each electrode in the electrode array by counting the number of interactions the electrode has. Using this information the technique identifies noisy electrodes by finding electrodes that are significantly dissimilar to the other electrodes. Read More

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:2304-2307

Rehabilitation training combined with human psychological and physiological information can enhance patients' neural engagement. For this purpose, a racial expression and muscle fatigue based rehabilitation training method is proposed in this paper. Signals from major zygomaticus and corrugator supercilii muscles are used for racial expression recognition, and signals from rectus femoris and biceps femoris muscles are used for fatigue level analysis. Read More

Conf Proc IEEE Eng Med Biol Soc 2018 Jul;2018:2292-2295

In addition to changes in the central nervous system, many changes can occur in the composition and structure of skeletal muscles after a hemispheric stroke. The mechanical behavior of skeletal muscles is linked to the density and structural arrangement of key constituents. Yet, little is known about changes in post-stroke muscle mechanical properties such as viscoelasticity. Read More