Document Detail


High-density EEG and independent component analysis mixture models distinguish knee contractions from ankle contractions.
MedLine Citation:
PMID:  22255264     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Decoding human motor tasks from single trial electroencephalography (EEG) signals can help scientists better understand cortical neurophysiology and may lead to brain computer interfaces (BCI) for motor augmentation. Spatial characteristics of EEG have been used to distinguish left from right hand motor imagery and motor action. We used independent component analysis (ICA) of EEG to distinguish right knee action from right ankle action. We recorded 264-channel EEG while 5 subjects performed a variety of knee and ankle exercises. An adaptive mixture independent component analysis (ICA) algorithm generated two distinct mixture models from a merged set of EEG signals (including both knee and ankle actions) without prior knowledge of the underlying exercise. The ICA mixture models parsed EEG signals into maximally independent component (IC) processes representing electrocortical sources, muscle sources, and artifacts. We calculated a spatially fixed equivalent current dipole for each IC using an inverse modeling approach. The fit of the models to the single trial EEG signals distinguished knee exercises from ankle exercise with 90% accuracy. For 3 of 5 subjects, accuracy was 100%. Electrocortical current dipole locations revealed significant differences in the knee and ankle mixture models that were consistent with the somatotopy of the tasks. These data demonstrate that EEG mixture models can distinguish motor tasks that have different somatotopic arrangements, even within the same brain hemisphere.
Authors:
Joseph T Gwin; Daniel Ferris
Related Documents :
6520874 - The change of the free energy of atp hydrolysis during global ischemia and anoxia in th...
12395964 - The assessment of brain injury with measurement of calcium fluorescent intensity of a v...
7587344 - Hemorrhagic shock.
14609594 - Effect of atorvastatin on exercise-induced myocardial ischemia in patients with stable ...
2335174 - The effect of hypoxia on performance during 30 s or 45 s of supramaximal exercise.
6520874 - The change of the free energy of atp hydrolysis during global ischemia and anoxia in th...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference     Volume:  2011     ISSN:  1557-170X     ISO Abbreviation:  Conf Proc IEEE Eng Med Biol Soc     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2012-01-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101243413     Medline TA:  Conf Proc IEEE Eng Med Biol Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4195-8     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  An automatic ocular artifacts removal method based on wavelet-enhanced canonical correlation analysi...
Next Document:  Calibrating EEG-based motor imagery brain-computer interface from passive movement.