Abstract:
:Biomechanical models used to estimate joint loads often predict that antagonistic muscles are inactive or underestimate their contributions [3, 5]. This can result in systematic underestimation of muscle force predictions and joint contact forces. To test the feasibility of employing an empirical co-activation ratio to improve shoulder muscle force modeling estimates, it was purposed to define the co-activation relationship between humeral internal and external rotator muscles in young healthy adults. Electromyography was recorded from rotator cuff and shoulder musculature of 20 adults. Participants performed 54 submaximal voluntary force exertions of humeral internal and external rotation at various humeral abduction and rotation postures. Empirical co-activation relationships for aggregates of humeral internal and external rotators (non-weighted and PCSA-weighted versions) were well characterized by regression models (r (2) = 0.62-0.70) during internal rotation exertions, but only moderately well (r (2) = 0.35-0.42) during external rotation exertions. Humeral abduction and intensity were important predictors in both exertion types. There was no or minimal improvement in r (2) using PCSA-weighted CIs, suggesting low utility. Quantification and implementation of shoulder co-activation into biomechanical models may improve muscle force and joint load estimates, which could assist in more reliable injury risk and tissue load predictions.
journal_name
Med Biol Eng Computjournal_title
Medical & biological engineering & computingauthors
Brookham RL,Dickerson CRdoi
10.1007/s11517-013-1081-2subject
Has Abstractpub_date
2014-03-01 00:00:00pages
257-64issue
3eissn
0140-0118issn
1741-0444journal_volume
52pub_type
杂志文章abstract::Variations in the amplitude and period of essential and Parkinsonian tremors were studied. It was found that the variations in frequency (or period) were mostly similar to the white noise, with the standard deviation typically less than 10% of the mean, whereas the variations in amplitude were much larger, with standa...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02344710
更新日期:2004-05-01 00:00:00
abstract::The aim of the study was to compare experimentally conduction velocity (CV) estimates obtained with different estimation methods based on surface electromyogram (EMG) signals detected using five spatial filters. The filters investigated were the longitudinal single and double differential, transverse single and double...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02348440
更新日期:2003-05-01 00:00:00
abstract::From adult data, it is known that numerous factors, such as age, state of the autonomic nervous system, diurnal rhythms or mean R-R interval mRR, influence heart rate variability (HRV). The aim of this study was the examination of the influence of gestational age, mRR, gender and time of day on fetal HRV. The analysis...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02344729
更新日期:2005-07-01 00:00:00
abstract::A method for the identification of the breast boundary in mammograms is presented. The method can be used in the preprocessing stage of a system for computer-aided diagnosis (CAD) of breast cancer and also in the reduction of image file size in picture archiving and communication system applications. The method starte...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02344632
更新日期:2004-03-01 00:00:00
abstract::Smoothing and differentiation of noisy signals are common problems whenever it is difficult or impossible to obtain derivatives by direct measurement. In biomechanics body displacements are frequently assessed and these measurements are affected by noise. To avoid high-frequency noise magnification, data filtering bef...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02441963
更新日期:1990-09-01 00:00:00
abstract::The advent of multifunctional nanoparticle has enabled numerous innovative strategies in diagnostics, imaging, and cancer therapy. Despite the intense research efforts in developing new nanoparticles and surface bonding ligands, one major obstacle in achieving highly effective treatment, including minimizing detriment...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-018-1818-z
更新日期:2018-11-01 00:00:00
abstract::Electroencephalography (EEG) has been widely utilized to measure the depth of anaesthesia (DOA) during operation. However, the EEG signals are usually contaminated by artifacts which have a consequence on the measured DOA accuracy. In this study, an effective and useful filtering algorithm based on multivariate empiri...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-016-1598-2
更新日期:2017-08-01 00:00:00
abstract::Segmentation and classification of low-quality and noisy ultrasound images is challenging task. In this paper, a new approach is proposed for robust segmentation and classification of carotid artery ultrasound images and consequently, detecting cerebrovascular disease. The proposed technique consists of two phases, in...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-016-1481-1
更新日期:2016-12-01 00:00:00
abstract::Selective internal radiation therapy (SIRT) using Yttrium-90 loaded glass microspheres injected in the hepatic artery is an emerging, minimally invasive therapy of liver cancer. A personalized intervention can lead to high concentration dose in the tumor, while sparing the surrounding parenchyma. We propose a computat...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-017-1703-1
更新日期:2018-03-01 00:00:00
abstract::Computational modeling of the brain is crucial for the study of traumatic brain injury. An anatomically accurate model with refined details could provide the most accurate computational results. However, computational models with fine mesh details could take prolonged computation time that impedes the clinical transla...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-020-02262-1
更新日期:2020-11-01 00:00:00
abstract::Thousands of patients receive human tissue grafts every year. Developments in cell and tissue engineering have also increased considerably the number of available products of human origin. France has very strict regulations, in part stimulated by problems of public health and ethics that have emerged in recent years a...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02344783
更新日期:2000-03-01 00:00:00
abstract::Trabecular bone has a complicated porous microstructure and consists of interconnected plates and rods known as trabeculae. The microarchitecture of the trabeculae contributes to load distribution capacity and, particularly, the optimal bone strength. Many previous studies have shown that morphological parameters are ...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-012-0951-3
更新日期:2012-10-01 00:00:00
abstract::This study is based on the hypothesis that the pressure within the arterial network can be usefully decomposed as the sum of a reservoir pressure and an excess pressure. The reservoir pressure waveform is defined to be the same in each vessel but delayed by the wave travel time from the root of the aorta. Using calcul...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-012-0872-1
更新日期:2012-04-01 00:00:00
abstract::A new algorithm to resolve superimposed motor unit action potentials (MUAPs) is described, which uses a reduced search space and is based on the peel off approach. Knowledge specific to the problem domain, such as temporal relationships between and within motor unit action potential trains and MUAP energy information,...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02637020
更新日期:1996-01-01 00:00:00
abstract::Neuronal excitability is determined in a complex way by several interacting factors, such as membrane dynamics, fibre geometry, electrode configuration, myelin impedance, neuronal terminations[Formula: see text] This study aims to increase understanding in excitability, by investigating the impact of these factors on ...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-018-1799-y
更新日期:2018-09-01 00:00:00
abstract::Deep brain stimulation (DBS) surgery is extensively used in the treatment of movement disorders. Nevertheless, methods to evaluate the clinical response during intraoperative stimulation tests to identify the optimal position for the implantation of the chronic DBS lead remain subjective. In this paper, we describe a ...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-016-1559-9
更新日期:2017-05-01 00:00:00
abstract::The passive and active properties of the cochlear outer hair cell are studied. The outer hair cell is currently considered the major candidate for the active component of mammalian hearing. Understanding of its properties may explain the amplification and sharp frequency selectivity of the ear. To analyse the cell beh...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02513294
更新日期:1999-03-01 00:00:00
abstract::Quantitative analysis and detection of electroencephalogram (EEG) recordings during evoked activities is essential for clinical diagnosis on neurological disorders. However, the process of interpreting EEG is time consuming for electroencephalographers (EEGers). In this study, an automatic EEG interpretation system co...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-010-0688-9
更新日期:2011-02-01 00:00:00
abstract::A new method of stimulation of the lower extremities was devised that automatically adjusts the stimulation conditions at any angle of the knee joint. An M-wave is considered to indicate the stimulation conditions, because it is the waveform that results from direct stimulation to the axon of the alpha motor neuron. T...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02351018
更新日期:2004-01-01 00:00:00
abstract::Neurofilaments are organised into parallel bundles in axons through crossbridges formed by lateral projections of neurofilament subunits. Pure neurofilaments form gels in vitro, consisting of interconnected parallel arrays of filaments regulated by the phosphorylation level of neurofilament subunits. Neurofilament-ass...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02522486
更新日期:1998-05-01 00:00:00
abstract::Fluctuation analysis has great potential to contribute to pulmonary clinical science and practice. We evaluated the relationship between asthma and the respiratory impedance recurrence period density entropy (RPDEnZrs) and the variability (SDZrs). A non-invasive and simple protocol for assessing respiratory mechanics ...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-012-0957-x
更新日期:2012-12-01 00:00:00
abstract::Mammography is a widely used screening tool and is the gold standard for the early detection of breast cancer. The classification of breast masses into the benign and malignant categories is an important problem in the area of computer-aided diagnosis of breast cancer. A small dataset of 57 breast mass images, each wi...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-006-0077-6
更新日期:2006-08-01 00:00:00
abstract::High-intensity noises are a health hazard for industrial workers, and hearing protection is necessary to prevent hearing loss. Passive methods, such as ear muffs, are ineffective against low-frequency noise. Moreover, many hearing-impaired workers must wear hearing aids to enable communication at their workplace, and ...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02430951
更新日期:2005-11-01 00:00:00
abstract::A method is presented for automatic analysis of the P-wave, based on lead II of a 12-lead standard ECG, in resting conditions during a routine examination for the detection of patients prone to atrial fibrillation (AF), one of the most prevalent arrhythmias. First, the P-wave was delineated, and this was achieved in t...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02347697
更新日期:2002-01-01 00:00:00
abstract::Reactive hyperaemia is the term given to the temporary increase in blood flow that follows release of an occlusion of the arterial supply. Measurement of reactive hyperaemia in the leg below the knee is useful in assessment of the vascular system, as resting flows remain unaffected even in the presence of quite severe...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/BF02515312
更新日期:1994-09-01 00:00:00
abstract::We introduce a novel method for an automatic classification of subjects to those with or without neuromuscular disorders. This method is based on multiscale entropy of recorded surface electromyograms (sEMGs) and support vector classification. The method was evaluated on a single-channel experimental sEMGs recorded fr...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-010-0629-7
更新日期:2010-08-01 00:00:00
abstract::This paper presents a novel hybrid medical stent device. This hybrid stent device formed by fractal mesh structures provides a flow-diverting effect and stent-assisted coil embolization. Flow-diverter stents decrease blood flow into an aneurysm to prevent its rupture. In general, the mesh size of a flow-diverter stent...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-015-1374-8
更新日期:2016-05-01 00:00:00
abstract::Spinal cord injury patients are under daily risk for developing deep tissue injury which is a severe pressure ulcer that initiates in soft tissues at the bones' proximity. We aimed to formulate a patient-specific biomechanical model that can continuously monitor internal tissue stresses in real time. We adopted a form...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-011-0754-y
更新日期:2011-04-01 00:00:00
abstract::A computer-assisted human peripheral blood leukocyte image classification method based on Siamese network is proposed. Firstly, a Siamese network with two identical convolutional neural network (CNN) sub-networks and a logistic regression for leukocyte five classification is designed, which can learn not only distingu...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-020-02180-2
更新日期:2020-07-01 00:00:00
abstract::A simple inertial measurement unit (IMU) incorporating rate gyroscopes and accelerometers has been tested to investigate the trunk kinematics during the sit-to-stand. It was affixed at trunk L5 level and used for sit-to-stand position and orientation reconstruction. The method was validated with standard optoelectroni...
journal_title:Medical & biological engineering & computing
pub_type: 杂志文章
doi:10.1007/s11517-007-0224-8
更新日期:2007-10-01 00:00:00