Holger Nahrstaedt

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A neuroprosthetic device for treating swallowing disorders requires an implantable measurement system capable to analysing the timing and quality of the swallowing process in real time. A combined EMG bioimpedance (EMBI) measurement system was developed and is evaluated here. The study was planned and performed as a case–control study. The studies were(More)
INTRODUCTION Developing an automated diagnostic and therapeutic instrument for treating swallowing disorders requires procedures able to reliably detect and evaluate a swallow. We tested a two-stage detection procedure based on a combined electromyography/bioimpedance (EMBI) measurement system. EMBI is able to detect swallows and distinguish them from(More)
The topic of this contribution is iterative learning control of a drop-foot stimulator in which a predefined angle profile during the swing phase is realized. Ineffective dorsiflexion is compensated by feedback-controlled stimulation of the muscle tibialis anterior. The ankle joint measurement is based on changes in the bioimpedance (BI) caused by leg(More)
Der Schluckvorgang verschließt für die Nahrungspassage den Kehlkopf und unterbricht den Atemstrom. Der Zeitpunkt der Atemunterbrechung und die Körperposition können Einfluss auf das Ergebnis des Schluckvorgangs haben. Der Einfluss der Körperposition auf den Schluckvorgang und die Atem-Schluck-Koordination (ASK) wird untersucht. Die Untersuchungen wurden als(More)
Dieser Beitrag beschreibt den Entwurf einer linearen Iterativ Lernenden Regelung (ILR) im Zeitbereich für die automatische Anpassung einer Neuroprothese bei Schlaganfallpatienten. Eine unzureichende Fußhebung in der Schwungphase des Ganges soll durch die gezielte Stimulation des Fußhebers kompensiert werden. Für die Erfassung des Gelenkwinkels wird ein(More)
In order to support swallowing, the efficacy of functional electrical stimulation for different stimulation settings of the submental musculature has been investigated. The stimulation was administrated at rest and synchronously to voluntary initiated swallows. The onset of a swallow was detected in real-time by a combined electromyography/ bioimpedance(More)
In dysphagia the ability of elevating the larynx and hyoid is usually impaired. Electromyography (EMG) and Bioimpedance (BI) measurements at the neck can be used to trigger functional electrical stimulation (FES) of swallowing related muscles. Nahrstaedt et al.1 introduced an algorithm to trigger the stimulation in phase with the voluntary swallowing to(More)
In the last years an increased interest in the electrical stimulation has consisted in the treatment of dysphagia. In the article we introduce the anatomical and physiological premises for the method. In a critical analysis the present state of art is represented, the clinical results are checked and the chances for the future are examined.
At the Institute for Process Control and Robotics reactive grasping skills are developed to enhance the Multifingered SCHUNK Dextrous Hand 2 (SDH2) in order to fulfill industrial needs. Therefore, RTAI Linux and Matlab Simulink RTW are used as application development system (RTAI, 2010),(Mathworks, 2010). The exchange of data between the Multi-fingered hand(More)
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