Magnetomyography
Encyclopedia
Magnetomyography is a technique for mapping muscle activity by recording magnetic field
s produced by electrical currents occurring naturally in the muscle
s, using arrays of SQUID
s (superconducting quantum interference devices). It has a better capability than electromyography
for detecting slow or direct currents.
Magnetic field
A magnetic field is a mathematical description of the magnetic influence of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude ; as such it is a vector field.Technically, a magnetic field is a pseudo vector;...
s produced by electrical currents occurring naturally in the muscle
Muscle
Muscle is a contractile tissue of animals and is derived from the mesodermal layer of embryonic germ cells. Muscle cells contain contractile filaments that move past each other and change the size of the cell. They are classified as skeletal, cardiac, or smooth muscles. Their function is to...
s, using arrays of SQUID
SQUID
A SQUID is a very sensitive magnetometer used to measure extremely weak magnetic fields, based on superconducting loops containing Josephson junctions....
s (superconducting quantum interference devices). It has a better capability than electromyography
Electromyography
Electromyography is a technique for evaluating and recording the electrical activity produced by skeletal muscles. EMG is performed using an instrument called an electromyograph, to produce a record called an electromyogram. An electromyograph detects the electrical potential generated by muscle...
for detecting slow or direct currents.