Annals of Biomedical Engineering

, Volume 37, Issue 11, pp 2402–2406 | Cite as

Detection of Peripheral Nerve and Skeletal Muscle Action Currents Using Magnetic Resonance Imaging

  • Ranjith S. WijesingheEmail author
  • Bradley J. Roth


Many researchers have attempted to detect neural currents directly using magnetic resonance imaging (MRI). The action currents of a peripheral nerve or skeletal muscle create their own magnetic field that can cause the phase of the spins to change. Our goal in this paper is to use the measured magnetic field of a nerve or muscle to estimate the resulting phase shift in the magnetic resonance signal. We examine four cases: the squid giant axon, the frog sciatic nerve, the human median nerve, and the rat EDL muscle. In each case, the phase shift is much less than one tenth of one degree, and will be very difficult to measure with current technology.


MRI Action currents Phase shift Nerve Muscle 



This research was supported by the National Institutes of Health Grant R01EB008421.


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Copyright information

© Biomedical Engineering Society 2009

Authors and Affiliations

  1. 1.Department of Physics and AstronomyBall State UniversityMuncieUSA
  2. 2.Department of PhysicsOakland UniversityRochesterUSA

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