Browsing by Author "Guzman Cabrera, Rafael"

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Citation Count: Fraga, T.C., Chiapas, J.M.D., Oliva, H.A.P., Moreles, M.A.M., Alayli, Y., Alvarado, J.D.B., Baleanu, D., Cabrera, R.G. (2016). A micro magnetic stimulator. Revista De Chimie, 67(8), 1534-1537.
A micro magnetic stimulator
(Chiminform Data S A, 2016) Cordova Fraga, Teodoro; De La Roca Chiapas, Jose Maria; Perez Oliva, Hueztin Aaron; Maldonado Moreles, Martin Alejandro; Alayli, Yasser; Alvarado, Jose De Jesus Bernal; Baleanu, Dumitru; Guzman Cabrera, Rafael
Transcranial magnetic stimulus is a non-invasive method for electrically stimulating the cerebral cortex applying squared pulses with certain frequency, during variable time intervals, over particular regions of the cranium. Some specific stimuli are able to depolarize neurons and produce measurable effects such that chains of these stimuli may modify the cortical excitability of both the stimulated zone and the related remote areas through functional anatomic connections. This allows an efficient tool on treating neurological and psychiatric conditions such as depression. In this work we present a novel stimulation architecture that allows localizing the magnetic field over small spatial regions such that the field amplitude is on the order of micro-Tesla, which is three orders of magnitude less than that used in the current technology. Besides localizing the stimuli, this novel architecture will help to reduce the secondary effects of the treatment due to the low field intensity.
Citation Count: Cordova Fraga, Teodoro...et al. (2018). "Magnetic Stimulation on Human Blood Electromotive force analysis", Revista de Chimie, Vol. 69, No. 11, pp. 3037-3041.
Magnetic Stimulation on Human Blood Electromotive force analysis
(Chiminform Data SA, 2018) Cordova Fraga, Teodoro; Maria Magdaleno, Dulce; Gomez Aguilar, Jose Francisco; Olivia Murillo, Blanca; Sosa, Modesto; Baleanu, Dumitru; Guzman Cabrera, Rafael; 56389
In this work a comparative theoretical analysis vs. experimental study on human blood under a magnetic field stimulation is presented. Twenty samples of leukoreduced human blood were stimulated alternant magnetic field using a Helmholtz coil system; this magnetic field induced an electromotive force in them. Theoretical calculations were performed for the induced electromotive force in a simple model of blood tissue under magnetic stimulation at frequencies: 50 Hz, 100 Hz, 800 Hz, and 1500 Hz. Experimental measurement was performed at the same frequencies for comparison purposes. Results show a high correlation between theoretical and experimental study, as well as effects of agglutination in the stimulated blood cells.