Medical Instrumentation
There are many categories of medical instruments ranging from those used in surgery to the ECG for monitoring the cardiovascular system.
In this article,we will be mostly concerned with medical instruments which record physiological signals including the ECG,EMG,and EEG that measure the voltage potentials on the skin.
These measurements are done by placing electrodes on specific locations of the body.Non evasive electrodes are surface electrodes,that can be placed on the skin whereas needle electrodes are evasive in the sense that they must pierce the area to obtain measurements.
