Bismillahirrahmanirrahim.
As
this semester begins, I need to start all of the designation and construction
of my Final Year Project’s circuit. So, I need to prepare all of the components
needed for the circuit construction.
As
this week start, I am doing research about the electrodes which I will use for
the input of my circuit.
Surface
electrodes detect biopotential signals from the body and transmit the signals
through connector. Biopotential is an electric quantity of voltage or current
or field strength, caused by chemical reactions of charged ions. Another use of
the term lies in describing the transfer of information between and within
cells, as in signal transduction. Biopotential is an electric potential that is
measured between points in living cells, tissues, and organisms, and which
accompanies all biochemical processes. Also describes the transfer of
information between and within cells.
Surface
electrode is a conductor or medium by which an electric current is conducted to
or from any medium, such as a cell, body, solution, or apparatus. For this
project, the electrode is place at five different part of eye area. Two at left
and right of the eyes, another two at upper part and lower part of either left
or right eye. The last electrode is placed in the middle of forehead. I had explained
this before. Usually, Ag-AgCl (silver-silver chloride) electrode type used
because of it produces the lowest and most stable junction potentials.
The
surface electrode is then connected to a circuit which will amplify the small
signal received from the biopotential signal of eyes. The figure is the types
of surface electrode used in biopotential recordings.
Barakallah.
