Document Detail


Soft magnetic material based localized magnetic stimulation to cultured neuronal cells and modulation of network activities.
MedLine Citation:
PMID:  22254248     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Magnetic stimulation is able to modulate the neuronal network activity using the non-invasive magnetically induced current. However, it is unknown how stimulation modulates the neuronal network activity. Therefore, we considered that precise stimulation and evaluation of the modulation of network activities in the vicinity of stimulated sites is required. Here, to establish precisely magnetic stimulation, we developed a Mu-metal that has high magnetic permeability soft magnetic material based localized magnetic stimulation (LMS) system with micro-fabricated dual cell-culture chambers. And, combining this device with a microelectrode array (MEA) permitted the evaluation of the stimulus effects at the stimulated and non-stimulated sites. Here, the dual cell-culture chambers were arranged in a concentric circle manner. Between the inner and outer chambers, 4, 8 and 12 connecting microfluid channels were fabricated using polydimethylsiloxane (PDMS). Rat cortical neurons were separately cultured in outer and inner chambers. Through the micro-conduits, functional synaptic connections were formed. Mu-metal was aligned along the outer circle, which allowed us of focal magnetic stimulation to the cells in the outer chamber. Applying low frequency magnetic field to the Mu-metal, induced currents were generated and the electrical activity of the cells in the outer chamber was modified depending on the stimulation intensity. Following the modified activity in the outer circles, the cells in the inner chamber also showed slightly depressed activity patterns. These results suggested that our system would be promising for highly regulated neural stimulation.
Authors:
Atsushi Saito; Aki Saito; Miho Goto; Kenta Shimba; Hiroyuki Moriguchi; Kiyoshi Kotani; Yasuhiko Jimbo
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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. Annual Conference     Volume:  2011     ISSN:  1557-170X     ISO Abbreviation:  Conf Proc IEEE Eng Med Biol Soc     Publication Date:  2011  
Date Detail:
Created Date:  2012-01-18     Completed Date:  2012-06-07     Revised Date:  2014-08-21    
Medline Journal Info:
Nlm Unique ID:  101243413     Medline TA:  Conf Proc IEEE Eng Med Biol Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  51-4     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Action Potentials / physiology*
Animals
Cell Culture Techniques / instrumentation*
Cells, Cultured
Electric Stimulation / instrumentation*
Equipment Design
Equipment Failure Analysis
Hardness
Magnetics*
Microelectrodes*
Nerve Net / physiology*
Neurons / physiology*,  radiation effects
Rats
Rats, Wistar
Reproducibility of Results
Sensitivity and Specificity

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


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