bioelectric phenomenona

8/13/2019 bioelectric phenomenona

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INTRODUCTION TOBIOELECTRICPHENOMENA


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BIOELECTROMAGNETISM

Bioelectromagnetism (discipline) examineselectric, electromagnetic, and magneticphenomena in biological tissues. Thesephenomena include:

The behavior of excitable tissue (the sources)The electric currents and potentials in the volumeconductorThe magnetic field at and beyond the bodyThe response of excitable cells to electric andmagnetic field stimulationThe intrinsic electric and magnetic properties of the


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BIOELECTROMAGNETISMBEN = bioengineering,

BPH = biophysics,BEM =bioelectromagnetism,MPH = medical physics,MEN = medicalengineering,MEL = medical

electronics.Interdisciplinary fields that associat

engineering with medicine an


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BIOELECTROMAGNETISM

Medic al e lectro nic s : A division of biomedicaengineering: electronic devices and methods inmedicine.

Medica l ph ys ics : A science based upon physicproblems in clinical medicine.

Bio m edical eng ineer ing : An engineeringdiscipline concerned with the application of scienc

and technology (devices and methods) to b


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BIOELECTROMAGNETISM

Bioelectromagnetism is subdivided ontheoretical grounds(two universal

principles):Maxwell's equations

(electromagnetics)The principle ofreciprocity .

Maxw ell 's Equa t ionsBioelectricity,

Bioelectromagnetism(biomagnetism),

Biomagnetism.

Reciproci tymeasurement of fields

stimulation and magn

measurement of intrinand magnetic properti


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Bioelectromagnetism (Reciprocity : measurement of fields)


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(Reciprocity : stimulation andmagnetization)


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(Reciprocity : measurement of intrinsicProperties)


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Bioelectromagnetis

m may besubdivided on theground of LeadField TheoreticalApproach


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oe ec r c y oe ec r cPhenomena

Bioelectric PhenomenaNerve cell and Musclecell

Neuron

Cell Membrane(Potential)Synapse (axon to cell)Muscle cell (involuntary)

e.g.: Myocardiac Muscle


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AnEukaryotic

Cell andcell

organelles


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Plasma-membrane/

Cellmembrane


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u osa c o e eMembrane)

Ions may traveltowards theconcentrationgradient createdbetween ECM andICM(Cytosol)


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Gated Ion Channels (Membrane)

most ion channelsare "gated" , meansthat they allowregulated diffusionthrough the pore


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Actionpotential and

restingpotential of

Neuron

bioelectric phenomenona

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