Act it Today, Think it Tomorrow
Donderdag 6 december 2007 16:30
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Brain-Computer Interface (BCI) can restore some function in paralysed patients by allowing them to use software to communicate or operate devices. Development of this technology has accelerated since researchers succeeded in having a non-human primate control a robotic arm by thinking about moving his real arm.Brain-Computer Interface (BCI) can restore some function in paralysed patients by allowing them to use software to communicate or operate devices. Development of this technology has accelerated since researchers succeeded in having a non-human primate control a robotic arm by thinking about moving his real arm. A microelectrode array was placed in the primary motor cortex and signals were registered and converted to instructions for the robotic arm. Later, a similar setup was succesful in several totally paralysed human patients. These invasive BCI systems complement non-invasive systems that use scalp EEG signals, where subjects are able to control a cursor in two dimensions.
Invasive BCI systems currently progress towards fully implantable low-maintenance solutions, but many issues need to be resolved, including choice of signal and therefore electrode type, biocompatibility of materials, signal feature detection algorithms, reliability etc.
I will first present examples of BCI in healthy controls and in patients. Then, I will present research where we want to identify foci on the cortical surface of the human brain that can be used for BCI, before implanting an electrode. For this we use functional MRI and specific tasks to reveal such foci, such as moving specific fingers (motor system), thinking about specific words (language system) or information processing (working memory system). Accuracy of fMRI-based localization, and amenability of these foci for cursor control are investigated in epilepsy patients who have an electrode grid implanted for diagnostic purposes (localization of the source of seizures).
- Wie:
- Nick F Ramsey PhD
- Wat:
- Act it Today, Think it Tomorrow: towards implantable neuroprosthetic brain devices
- Waar:
- Von Ronnenzaal k2-052 in the LUMC, Leiden
- Wanneer:
- 06-12-2007 van 16:30 tot 17:30
- Kosten:
- geen