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Total 332 results found since Jan 2013.
Sensors, Vol. 22, Pages 2728: Temporal Synergies Detection in Gait Cyclograms Using Wearable Technology
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The human gait can be described as the synergistic activity of all individual components of the sensory–motor system. The central nervous system (CNS) develops synergies to execute endpoint motion by coordinating muscle activity to reflect the global goals of the endpoint trajectory. This paper proposes a new method for assessing temporal dynamic synergies. Principal component analysis (PCA) has been applied on the signals acquired by wearable sensors (inertial measurement units, IMU and ground reaction force sensors, GRF mounted on feet) to detect temporal synergies in the space of two-dimensional PCA ...
Source: Sensors - April 2, 2022 Category: Biotechnology Authors: Marija M. Gavrilovi ć Milica M. Jankovi ć Tags: Article Source Type: research
Sensors, Vol. 22, Pages 2693: Biomechanical Assessment of Post-Stroke Patients & rsquo; Upper Limb before and after Rehabilitation Therapy Based on FES and VR
Sensors, Vol. 22, Pages 2693: Biomechanical Assessment of Post-Stroke Patients’ Upper Limb before and after Rehabilitation Therapy Based on FES and VR
Sensors doi: 10.3390/s22072693
Authors:
Daniela Montoya
Patricio Barria
Carlos A. Cifuentes
Luis F. Aycardi
André MorÃs
Rolando Aguilar
José M. AzorÃn
Marcela Múnera
Stroke is a medical condition characterized by the rapid loss of focal brain function. Post-stroke patients attend rehabilitation training to prevent the degeneration of physical function and improve upper limb movements and functional status after stroke. Promising rehabilit...
Source: Sensors - March 31, 2022 Category: Biotechnology Authors: Daniela Montoya Patricio Barria Carlos A. Cifuentes Luis F. Aycardi Andr é MorÃs Rolando Aguilar Jos é M. AzorÃn Marcela M únera Tags: Article Source Type: research
Sensors, Vol. 22, Pages 2691: Three-Dimensional Microwave Head Imaging with GPU-Based FDTD and the DBIM Method
We present a preliminary study of microwave head imaging using a three-dimensional (3-D) implementation of the distorted Born iterative method (DBIM). Our aim is to examine the benefits of using the more computationally intensive 3-D implementation in scenarios where limited prior information is available, or when the target occupies an area that is not covered by the imaging array’s transverse planes. We show that, in some cases, the 3-D implementation outperforms its two-dimensional (2-D) counterpart despite the increased number of unknowns for the linear problem at each DBIM iteration. We also discuss how ...
Source: Sensors - March 31, 2022 Category: Biotechnology Authors: Pan Lu Panagiotis Kosmas Tags: Article Source Type: research
Sensors, Vol. 22, Pages 2414: Sensing System for Plegic or Paretic Hands Self-Training Motivation
inik
Patients after stroke with paretic or plegic hands require frequent exercises to promote neuroplasticity and to improve hand joint mobilization. Available devices for hand exercising are intended for persons with some level of hand control or provide continuous passive motion with limited patient involvement. Patients can benefit from self-exercising where they use the other hand to exercise the plegic or paretic one. However, post-stroke neuropsychological complications, apathy, and cognitive impairments such as forgetfulness make regular self-exercising difficult. This paper describes Przypominajka v2&md...
Source: Sensors - March 21, 2022 Category: Biotechnology Authors: Igor Zubrycki Ewa Pr Ä…czko-Pawlak Ilona Dominik Tags: Article Source Type: research
Sensors, Vol. 22, Pages 2302: Investigation of Flow Changes in Intracranial Vascular Disease Models Constructed with MRA Images
This study aimed to develop a magnetic resonance imaging (MRI)-compatible flow delivery system and individualized models of circle of Willis (CoW), which include 50% and 100% blockage in internal carotid artery (ICA50 and ICA100), and 100% blockage in vertebral artery (VA100). Images were obtained using 3D time-of-flight and phase-contrast magnetic resonance angiography (MRA) sequences, and changes in velocity and flow direction at CoW models were analyzed. For the ICA50 and VA100 models, the flow was similar to that of the normal model. For the ICA 50 model, it was found that 50% blockage did not affect cerebral blood flo...
Source: Sensors - March 16, 2022 Category: Biotechnology Authors: Jeong-Heon Kim Ju-Yeon Jung Yeong-Bae Lee Chang-Ki Kang Tags: Article Source Type: research
Sensors, Vol. 22, Pages 2273: Determinants of Different Aspects of Upper-Limb Activity after Stroke
We examined factors associated with different aspects of upper-limb (UL) activity in chronic stroke to better understand and improve UL activity in daily life. Three different aspects of UL activity were represented by four sensor measures: (1) contribution to activity according to activity ratio and magnitude ratio, (2) intensity of activity according to bilateral magnitude, and (3) variability of activity according to variation ratio. We combined data from a Belgian and Danish patient cohort (n = 126) and developed four models to determine associated factors for each sensor measure. Results from standard multiple regress...
Source: Sensors - March 15, 2022 Category: Biotechnology Authors: Bea Essers Camilla Biering Lundquist Geert Verheyden Iris Charlotte Brunner Tags: Article Source Type: research
Sensors, Vol. 22, Pages 2143: Investigation of Underwater Shoulder Muscle Activity during Manikin-Carrying in Young Elite Lifesaving Athletes
ng So
Manikin carrying is a lifesaving sports technique, in which athletes stroke with one arm and carry a manikin of 60 kg with the other arm as they swim. Stabilizing the manikin exerts great demand on the shoulder muscles of the carrying arm; thus, this study aimed to investigate the muscle activation of the carrying shoulder and the possible factors associated with it. This was a cross-sectional study, in which 20 young elite lifesaving athletes were recruited from the Hong Kong Lifesaving Society. The muscle activity of the posterior deltoid (PD), teres major (TM), and middle trapezius (MT) were recorded with wire...
Source: Sensors - March 10, 2022 Category: Biotechnology Authors: Daniel Hon-Ting Tse Wan-Yu Kwok Billy Chun-Lung So Tags: Article Source Type: research
Sensors, Vol. 22, Pages 2060: Hand Measurement System Based on Haptic and Vision Devices towards Post-Stroke Patients
ubrycki
Diagnostics of a hand requires measurements of kinematics and joint limits. The standard tools for this purpose are manual devices such as goniometers which allow measuring only one joint simultaneously, making the diagnostics time-consuming. The paper presents a system for automatic measurement and computer presentation of essential parameters of a hand. Constructed software uses an integrated vision system, a haptic device for measurement, and has a web-based user interface. The system provides a simplified way to obtain hand parameters, such as hand size, wrist, and finger range of motions, using the homogen...
Source: Sensors - March 7, 2022 Category: Biotechnology Authors: Katarzyna Koter Martyna Samowicz Justyna Redlicka Igor Zubrycki Tags: Article Source Type: research
Sensors, Vol. 22, Pages 1776: Compressed Deep Learning to Classify Arrhythmia in an Embedded Wearable Device
In conclusion, Mobilenet would be a more efficient model than Resnet to classify arrhythmia in an embedded wearable device.
Source: Sensors - February 24, 2022 Category: Biotechnology Authors: Kwang-Sig Lee Hyun-Joon Park Ji Eon Kim Hee Jung Kim Sangil Chon Sangkyu Kim Jaesung Jang Jin-Kook Kim Seongbin Jang Yeongjoon Gil Ho Sung Son Tags: Article Source Type: research
Sensors, Vol. 22, Pages 1769: The Application of Biological Feedback in the Rehabilitation of Patients after Ischemic Stroke
ka Cyganik
Balance disorders are the main concern for patients after an ischemic stroke. They are caused by an abnormal force on the affected side or paresis, which causes uneven loading and visuospatial disorders. Minimizing the effects of stroke is possible through properly conducted rehabilitation. One of the known ways to achieve this objective is biological feedback. The lack of proper muscle tone on one side of the body is manifested by the uneven pressure of the lower extremities on the ground. The study and control groups were composed of two equal groups of 92 people each, in which the same set of kinesiothera...
Source: Sensors - February 24, 2022 Category: Biotechnology Authors: Marzena Ma Å„dziuk Marlena Krawczyk-Suszek Ryszard Maciejewski Jerzy Bednarski Andrzej Kotyra Weronika Cyganik Tags: Article Source Type: research
Sensors, Vol. 22, Pages 1676: Single-Trial Classification of Error-Related Potentials in People with Motor Disabilities; A Study in Cerebral Palsy, Stroke, and Amputees
In conclusion, ErrPs can be detected in participants with motor impairments; this may have implications for developing adaptive BCIs or automatic error correction.
Source: Sensors - February 21, 2022 Category: Biotechnology Authors: Nayab Usama Imran Khan Niazi Kim Dremstrup Mads Jochumsen Tags: Article Source Type: research
Sensors, Vol. 22, Pages 1409: Usability of Functional Electrical Stimulation in Upper Limb Rehabilitation in Post-Stroke Patients: A Narrative Review
ubim Santos
Stroke leads to significant impairment in upper limb (UL) function. The goal of rehabilitation is the reestablishment of pre-stroke motor stroke skills by stimulating neuroplasticity. Among several rehabilitation approaches, functional electrical stimulation (FES) is highlighted in stroke rehabilitation guidelines as a supplementary therapy alongside the standard care modalities. The aim of this study is to present a comprehensive review regarding the usability of FES in post-stroke UL rehabilitation. Specifically, the factors related to UL rehabilitation that should be considered in FES usability, as well ...
Source: Sensors - February 12, 2022 Category: Biotechnology Authors: Andreia S. P. Sousa Juliana Moreira Cl áudia Silva In ês Mesquita Rui Macedo Augusta Silva Rubim Santos Tags: Review Source Type: research
Sensors, Vol. 22, Pages 1419: Integrated Timing of Stroking, Breathing, and Kicking in Front-Crawl Swimming: A Novel Stroke-by-Stroke Approach Using Wearable Inertial Sensors
atteo Cortesi
Quantitative evaluation of synergic action among the different body segments is fundamental to swimming performance. The aim of the present study was to develop an easy-to-use tool for stroke-by-stroke evaluation of a swimmer’s integrated timing of stroking, kicking, and breathing. Twelve swimmers were evaluated during one trial of 100 m front-crawl swimming at self-selected speed. Five three-axial inertial sensors were mounted on the head, wrists, and ankles. Algorithms for the wrist entry into the water, the lower limb beat during the downward action, and the exit/entry of the face from/in...
Source: Sensors - February 12, 2022 Category: Biotechnology Authors: Silvia Fantozzi Vittorio Coloretti Maria Francesca Piacentini Claudio Quagliarotti Sandro Bartolomei Giorgio Gatta Matteo Cortesi Tags: Article Source Type: research
Sensors, Vol. 22, Pages 1386: A Wearable System Composed of FBG-Based Soft Sensors for Trunk Compensatory Movements Detection in Post-Stroke Hemiplegic Patients
In this study, a novel wearable system for the identification of compensatory trunk movements (CTMs) in post-stroke hemiplegic patients is presented. The device is composed of seven soft sensing elements (SSEs) based on fiber Bragg grating (FBG) technology. Each SSE consists of a single FBG encapsulated into a flexible matrix to enhance the sensor’s robustness and improve its compliance with the human body. The FBG’s small size, light weight, multiplexing capability, and biocompatibility make the proposed wearable system suitable for multi-point measurements without any movement restriction. Fir...
Source: Sensors - February 11, 2022 Category: Biotechnology Authors: Daniela Lo Presti Martina Zaltieri Marco Bravi Michelangelo Morrone Michele Arturo Caponero Emiliano Schena Silvia Sterzi Carlo Massaroni Tags: Article Source Type: research
Sensors, Vol. 22, Pages 1374: Artificial Neural Network Detects Hip Muscle Forces as Determinant for Harmonic Walking in People after Stroke
ni Morone
Many recent studies have highlighted that the harmony of physiological walking is based on a specific proportion between the durations of the phases of the gait cycle. When this proportion is close to the so-called golden ratio (about 1.618), the gait cycle assumes an autosimilar fractal structure. In stroke patients this harmony is altered, but it is unclear which factor is associated with the ratios between gait phases because these relationships are probably not linear. We used an artificial neural network to determine the weights associable to each factor for determining the ratio between gait phases and ...
Source: Sensors - February 11, 2022 Category: Biotechnology Authors: Marco Iosa Maria Grazia Benedetti Gabriella Antonucci Stefano Paolucci Giovanni Morone Tags: Article Source Type: research
