Magnetic field of a nerve impulse: first measurements

Science. 1980 Apr 4;208(4439):53-5. doi: 10.1126/science.7361105.


The magnetic field of the action potential from an isolated frog sciatic nerve was measured by a SQUID magnetometer with a novel room-temperature pickup coil. The 1.2 x 10(-10) tesla field was measured 1.3 millimeters from the nerve with a signal-to-noise ratio of 40 to 1.

MeSH terms

  • Action Potentials*
  • Animals
  • Anura
  • Magnetics*
  • Neural Conduction*
  • Sciatic Nerve / physiology