Wyniki wyszukiwania dla: Matija Strbac

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artykuł

Improving electrotactile communication with a multi‐pad electrode under cognitive load

Fabricio A. Jure, Erika G. Spaich, Laura Petrini, Jovana Malešević, więcej

Background Electrotactile systems are compact interfaces that can be used to convey information through the skin by producing a range of haptic sensations. In many applications, however, the user needs to perceive and interpret haptic stimulation while being engaged in parallel activities. Developing methods that ensure reliable recognition of electrotactile messages despite additional cognitive...

artykuł

Encoding of spatial patterns using electrotactile stimulation via a multi‐pad electrode placed on the torso

Fabricio A. Jure, Erika G. Spaich, Jovana Malešević, Miloš Kostić, więcej

Artificial Organs > 46 > 10 > 2044 - 2054

Background Tactile stimulation can be used to convey information to a user in different scenarios while avoiding overloading other senses. Tactile messages can be transmitted as spatial patterns, potentially allowing for a high information throughput. The aim of the present study was to design and test different encoding schemes to determine the best approach for conveying spatial patterns. Methods...

artykuł

Design of multi‐pad electrotactile system envisioned as a feedback channel for supernumerary robotic limbs

Tanja Boljanić, Milica Isaković, Jovana Malešević, Domenico Formica, więcej

Artificial Organs > 46 > 10 > 2034 - 2043

Background Providing real‐time haptic feedback is an important, but still not sufficiently explored aspect of the use of supernumerary robotic limbs (SRLs). We present a multi‐pad electrode for conveying multi‐modal proprioceptive and sensory information from SRL to the user's thigh and propose a method for stimuli calibration. Methods Within two pilot tests, we investigated return electrode configuration...

artykuł

Design and Fabrication of Printed Human Skin Model Equivalent Circuit: A Tool for Testing Biomedical Electrodes without Human Trials

Nikola Peřinka, Matija Štrbac, Milos Kostić, Jovana Malešević, więcej

Advanced Engineering Materials > 24 > 2 > n/a - n/a

Within the efforts of developing a new generation of biomedical electrodes with embedded switching logics, developing safe and simple procedures for testing these novel systems is tackled. The development and demonstration of an all‐printed flexible testbed for automated validation and testing of multi pad systems is presented. The system is based on a Human model equivalent circuit (HMEC), which,...

artykuł

Temporal and Spatial Variability of Surface Motor Activation Zones in Hemiplegic Patients During Functional Electrical Stimulation Therapy Sessions

Jovana Malešević, Matija Štrbac, Milica Isaković, Vladimir Kojić, więcej

Artificial Organs > 41 > 11 > E166 - E177

The goal of this study was to investigate surface motor activation zones and their temporal variability using an advanced multi‐pad functional electrical stimulation system. With this system motor responses are elicited through concurrent activation of electrode matrix pads collectively termed “virtual electrodes” (VEs) with appropriate stimulation parameters. We observed VEs used to produce selective...

artykuł

Short- and Long-Term Learning of Feedforward Control of a Myoelectric Prosthesis with Sensory Feedback by Amputees

Matija Strbac, Milica Isakovic, Minja Belic, Igor Popovic, więcej

IEEE Transactions on Neural Systems and Rehabilitation Engineering > 2017 > 25 > 11 > 2133 - 2145

Human motor control relies on a combination of feedback and feedforward strategies. The aim of this study was to longitudinally investigate artificial somatosensory feedback and feedforward control in the context of grasping with myoelectric prosthesis. Nine amputee subjects performed routine grasping trials, with the aim to produce four levels of force during four blocks of 60 trials across five...

artykuł

A System for Electrotactile Feedback Using Electronic Skin and Flexible Matrix Electrodes: Experimental Evaluation

Marta Franceschi, Lucia Seminara, Strahinja Dosen, Matija Strbac, więcej

IEEE Transactions on Haptics > 2017 > 10 > 2 > 162 - 172

Myoelectric prostheses are successfully controlled using muscle electrical activity, thereby restoring lost motor functions. However, the somatosensory feedback from the prosthesis to the user is still missing. The sensory substitution methods described in the literature comprise mostly simple position and force sensors combined with discrete stimulation units. The present study describes a novel...

artykuł

Multichannel Electrotactile Feedback With Spatial and Mixed Coding for Closed-Loop Control of Grasping Force in Hand Prostheses

Strahinja Dosen, Marko Markovic, Matija Strbac, Minja Belic, więcej

IEEE Transactions on Neural Systems and Rehabilitation Engineering > 2017 > 25 > 3 > 183 - 195

Providing somatosensory feedback to the user of a myoelectric prosthesis is an important goal since it can improve the utility as well as facilitate the embodiment of the assistive system. Most often, the grasping force was selected as the feedback variable and communicated through one or more individual single channel stimulation units (e.g., electrodes, vibration motors). In the present study, an...

rozdział

Kinect in neurorehabilitation: Computer vision system for real time hand and object detection and distance estimation

Matija Strbac, Marko Markovic, Dejan B. Popovic

11th Symposium on Neural Network Applications in Electrical Engineering > 127 - 132

2012 11th Symposium on Neural Network Applications in Electrical Engineering (NEUREL 2012)

This paper presents image processing and scene analysis methods that can provide artificial vision that is of interest for automatic selection of hand trajectory and prehension. The new algorithm, which uses data from the Kinect sensor, allows real-time detection of the hand of the person grasping an object at working table in front of that person. The outputs are real world coordinates of the hand...

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Wyniki wyszukiwania dla: Matija Strbac

Improving electrotactile communication with a multi‐pad electrode under cognitive load

Encoding of spatial patterns using electrotactile stimulation via a multi‐pad electrode placed on the torso

Design of multi‐pad electrotactile system envisioned as a feedback channel for supernumerary robotic limbs

Design and Fabrication of Printed Human Skin Model Equivalent Circuit: A Tool for Testing Biomedical Electrodes without Human Trials

Temporal and Spatial Variability of Surface Motor Activation Zones in Hemiplegic Patients During Functional Electrical Stimulation Therapy Sessions

Short- and Long-Term Learning of Feedforward Control of a Myoelectric Prosthesis with Sensory Feedback by Amputees

A System for Electrotactile Feedback Using Electronic Skin and Flexible Matrix Electrodes: Experimental Evaluation

Multichannel Electrotactile Feedback With Spatial and Mixed Coding for Closed-Loop Control of Grasping Force in Hand Prostheses

Kinect in neurorehabilitation: Computer vision system for real time hand and object detection and distance estimation

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