Holger Nahrstaedt

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This contribution describes the design of linear Iterative Learning Control (ILC) in the time-domain for the automatic adaptation of a drop-foot neuroprosthesis for stroke patients. Ineffective dorsi flexion during gait swing phase is compensated by controlled stimulation of the M. tibials anterior. The ankle-joint measurement is based on a new method in(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)
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)
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 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)
BACKGROUND To allow passage of food, the swallowing process closes off the larynx and interrupts respiratory flow. Both the timing of the interruption of respiratory flow and the body position can affect the results of the swallowing process. OBJECTIVE The effect of body position on the swallowing process and the coordination of breathing and swallowing(More)
At the Institute for Process Control and Robotics reactive grasping skills are developed to enhance the Multi-fingered 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(More)
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