I. J. Robotics and Automation. 01/2011; 26.
Conference Proceeding: Polymer sensorised microgrippers using SMA actuation.2007 IEEE International Conference on Robotics and Automation, ICRA 2007, 10-14 April 2007, Roma, Italy; 01/2007
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ABSTRACT: We present data from cuff electrode recordings from a mixed sensory-/motor nerve as expressed during walking in chronically implanted Göttingen mini-pigs. Our results show that it is possible to filter out residual electromyographic interference and that the energy content of the resulting electroneurographic (ENG) signals modulate clearly with gait. The approach may be used to detect heel strike from cuff electrode measurements to control the timing of stimulation in implantable foot drop correction systems.Conference proceedings: ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference 08/2011; 2011:2280-3.
Article: Symmetry of post-movement beta-ERS and motor recovery from stroke: a low-resolution EEG pilot study.[show abstract] [hide abstract]
ABSTRACT: The inter-hemispheric symmetry of electroencephalographic (EEG) post-movement beta-event-related synchronization (PMBS) after movements on a drawing board was studied in eight acute stroke subjects with mild hemiparesis and eight normal subjects. A follow-up testing was conducted 3 months after the initial recordings with a twofold purpose: (1) to validate the reproducibility of the experimental protocol in normal subjects; and (2) to study changes of inter-hemispheric PMBS-symmetry as a response to recovery of motor function. PMBS values were calculated and their topographic distributions illustrated at various time instances following movement offset. Significant PMBS patterns were present in all normal subjects, with only minor differences within consecutive recordings. The side of hemiparesis in acute stroke subjects could be distinguished (P = 0.04) on the basis of the signed symmetry index, a quantitative measure of lateralization. The follow-up testing on three recovered stroke subjects revealed a trend of changes in the lateralization towards the contralateral side of movement, an indication that the cortical organization of movement following recovery turned out as reported for normal subjects. Further clinical investigations need to be carried out to evaluate the relationship between recovery and PMBS symmetry on a large number of subjects, using the method presented here.European Journal of Neurology 01/2007; 13(12):1312-23. · 3.69 Impact Factor
Article: Novel haptic tool and input device for real time bilateral biomanipulation addressing endoscopic surgery.[show abstract] [hide abstract]
ABSTRACT: In this paper a sensorised polymer microgripper is presented which can be used as a suitable end effector on an endoscopic microinstrument for robot-assisted and possibly teleoperated surgery to enable the operator to receive haptic feedback information on the forces generated during the procedure. A novel tweezers- like haptic input device is also described, which gives the operator the ability to remotely feel these forces generated by grasping operations with the microgripper. This feedback is used to control the amount of force applied in manipulation of tissues during the procedure. The mechanical and electronic design of the microgripper, microinstrument and haptic tweezers is also presented and preliminary results detailed.Conference proceedings: ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference 02/2007; 2007:198-201.