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Modulation of Cortical Excitability by Detection of Motor Intention and Artificial Afferent Feedback

Published on Dec 03, 20122812 Views

Dario Farina

Brain-computer interfaces (BCI) have applications in function restoration, function replacement, and communication. A further potential application of BCI systems, which has been less extensively inve

BBCI Workshop 2012 - Berlin

Related categories

NeuroscienceNeurotechnology

Chapter list

Modulation of Cortical Excitability by Detection of Motor Intention and Artificial Afferent Feedback00:00
Outline (1)01:27
Outline (2)01:57
BCI Operation Characteristics01:58
BCI Applications for communication/ restoration/replacement of function02:22
Movement-Related Cortical Potential (MRCP) (1)02:51
Movement-Related Cortical Potential (MRCP) (2)03:57
Movement-Related Cortical Potential (MRCP) (3)04:29
Focus on BCI for neuromodulation04:49
Outline (3)05:24
Outline (4)05:27
Paired associative stimulation (PAS)05:38
Criticality of the time delay06:39
PAS: Classic paradigm07:46
A new intervention based on brain activity07:55
MRCP-triggered stimulation: Effect of delay POST08:57
Experimental set-up09:50
Representative MEPs10:20
Intervention 1: Prior to PN = PN (ms) – SD (ms) – 50ms10:51
Intervention 2: At PN = PN (ms) - 50ms (time for ES to reach MCx)11:26
Intervention 3: After PN = PN (ms) + SD (ms) – 50ms11:37
Control experiments12:40
Online detection of MRCP with small latency needed13:21
Can MRCPs be detected from single-trial EEG ?14:12
Method14:34
Performance in detection14:45
Detection latency15:32
Subject-specific training is not needed16:37
MRCPs can be detected online with 80% ...17:30
Self-paced imagination18:07
Online detection and stimulation at peak negativity18:57
Asynchronous Imagery19:05
Group Data (TA muscle)19:36
Online detection has sufficient accuracy ...20:18
Outline (5)20:48
Outline (6)20:49
Patients characteristics20:58
Stability of the MRCP (one patient)21:29
Detection latency in patients22:20
Changes in motor evoked potential (MEP) following the intervention (3 weeks, 3 times per week) (1)22:51
Changes in motor evoked potential (MEP) following the intervention (3 weeks, 3 times per week) (2)23:32
Statistics and control conditions23:33
Functional improvement (10 m walk)24:24
Control of robotic devices with MRCPs25:51
Detection of gait initiation27:56
Step initiation detection by MRCPs28:44
Outline (7)29:46