Current Flow in the Human Body

  • Dorin Panescu
  • Robert A. Stratbucker*

Nonlethal weapons provide military and law enforcement personnel with a tool to resolve conflict with a proportionate, lawful, appropriate, and necessary use of force [1,2]. The CEW method of incapacitation is through electrical activation of skeletal muscle tissue innervated by peripheral nerves within the electric field created by the CEW [3]. The stimuli from a will override the motor nervous system and block the command and control of the human body. Conventional stun devices stimulate sensory neurons for pain compliance and can be overridden by a focused individual. The CEW directly stimulates preendplate motor nerves, causing incapacitation regardless of subject’s mental focus, training, size, or drug-induced dementia [4]. The most popular TASER CEW models supplied to law enforcement agencies are the M26 and X26.


Finite Element Modeling Right Ventricular Ventricular Fibrillation Current Density Distribution Current Density Threshold 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 1.
    Non-lethal Force, Wikipedia. Available at:
  2. 2.
    Council of Foreign Relations, Less-lethal Weapons and Capabilities, New York, NY, 2004. Available at:
  3. 3.
    TASER Technology Summary. Available at
  4. 4.
    Smith PW, Hand-held stun gun for incapacitating a human target, US Patent 6,636,412, October 21, 2003.Google Scholar
  5. 5.
    TASER International, M26E Series Electronic Control Device Specification. 2006.Google Scholar
  6. 6.
    TASER International, X26E Series Electronic Control Device Specification. 2006.Google Scholar
  7. 7.
    Reilly JP, Freeman VT, and Larkin WD. Sensory effects of transient electrical stimulation: Evaluation with a neuroelectric model. IEEE Trans Biomed Eng 1985; 32(12); 1001–1011.PubMedCrossRefGoogle Scholar
  8. 8.
    Reilly JP. Applied bioelectricity: from electrical stimulation to electropathology. New York: Springer, 1998.Google Scholar
  9. 9.
    Sun H and Webster JG. Estimating neuromuscular stimulation within the human torso with Taser® stimulus. Phys Med Biol 2007; 52; 6401–6411.PubMedCrossRefGoogle Scholar
  10. 10.
    Gehl J, Sorensen TH, Nielsen K, Raskmark P, Nielsen SL, Skovsgaard T, and Mir LM. In vivo electroporation of skeletal muscle: threshold, efficacy and relation to electric field distribution. BBA-General Subjects 1999; 1428(2–3); 233–240.PubMedCrossRefGoogle Scholar
  11. 11.
    Panescu D, Webster JG, and Stratbucker RA. A nonlinear finite element model of the electrode-electrolyte-skin system. IEEE Trans Biomed Eng 1994; 41(7); 681–687.PubMedCrossRefGoogle Scholar
  12. 12.
    Panescu D, Webster JG, Tompkins WJ, and Stratbucker RA. Optimization of cardiac defibrillation by three-dimensional finite element modeling of the human thorax. IEEE Trans Biomed Eng 1995; 42(2); 185–192.PubMedCrossRefGoogle Scholar
  13. 13.
    Structural Research & Analysis Corporation (SRAC), division of SolidWorks Corporation, COSMOS/M:
  14. 14.
    McDaniel W, Stratbucker RA, Nerheim M, and Brewer JE. Cardiac safety of neuromuscular incapacitating defensive devices. PACE 2004; 28; S1–S4.Google Scholar
  15. 15.
    McDaniel W, Stratbucker RA, and Smith RW. Surface application of TASER stun guns does not cause ventricular fibrillation in canines. Proc IEEE-EMBS Ann Intl Conf 2000.Google Scholar
  16. 16.
    Geddes LA and Baker LE. Principles of applied biomedical instrumentation, 3rd ed. New York: John Wiley & Sons, 1989.Google Scholar
  17. 17.
    Sun H, Wu JY, Abdallah R, and Webster JG. Electromuscular incapacitating device safety. Proc IFMBE, 3rd EMBE Conference, Prague 2005; 11(1).Google Scholar
  18. 18.
    Lakkireddy D, Wallick D, Ryschon K, Chung MK, Butany J, Martin D, Saliba W, Kowalewski W, Natale A, and Tchou PJ. Effects of cocaine intoxication on the threshold for stun gun induction of ventricular fibrillation. J Am Col Cardiol 2006; 48; 805–811.CrossRefGoogle Scholar
  19. 19.
    Sun H. Models of ventricular fibrillation probability and neuromuscular stimulation after Taser® use in humans. PhD thesis: University of Wisconsin, 2007. Available online:
  20. 20.
    Wu J-Y, Sun H, O’Rourke A, Huebner S, Rahko PS, Will JA, and Webster JG. TASER dart-to-heart distance that causes ventricular fibrillation in pigs. IEEE Trans Biomed Eng 2007; 54; 503–508.PubMedCrossRefGoogle Scholar
  21. 21.
    Wu J-Y, Sun H, O’Rourke A, Huebner S, Rahko PS, Will JA, and Webster JG. TASER blunt dart-to-heart distance causing ventricular fibrillation in pigs. IEEE Trans Biomed Eng 2007; in press.Google Scholar
  22. 22.
    Stratton SJ, Rogers C, Brickett K, and Gruzinski G. Factors associated with sudden death of individuals requiring restraint from excited delirium. Am J Emerg Med 2001; 19; 187–191.PubMedCrossRefGoogle Scholar
  23. 23.
    Walcott GP, Walker RG, Cates AW, et al. Choosing the optimal monophasic and biphasic waveforms for ventricular defibrillation. J Cardiovasc Electrophysiol 1995; 6; 737–750.PubMedCrossRefGoogle Scholar
  24. 24.
    Ideker RE and Dosdall DJ. Can the direct cardiac effects of the electric pulses generated by the TASER X26 cause immediate or delayed sudden cardiac arrest in normal adults? Am J Forensic Med Pathol 2007; 28; 195–201.PubMedCrossRefGoogle Scholar
  25. 25.
    Knisley SB, Smith WM, and Ideker RE. Effect of field stimulation on cellular repolarization in rabbit myocardium. Implications for reentry induction. Circ Res 1992; 70(4); 707–715.PubMedGoogle Scholar
  26. 26.
    Knisley SB, Smith WM, and Ideker RE. Prolongation and shortening of action potentials by electrical shocks in frog ventricular muscle. Am J Physiol 1994; 266(6 Pt 2); H2348–2358.PubMedGoogle Scholar
  27. 27.
    Bien H, Yin L, and Entcheva E. Calcium instabilities in mammalian cardiomyocyte networks. Biophys J Jan 6, 2006.Google Scholar
  28. 28.
    Zarlink Semiconductor, Medical Surge Protection: Technical Documentation,
  29. 29.
    BSI British Standards. BS EN 60601-1:2006 Medical electrical equipment. General requirements for basic safety and essential performance. 2006.Google Scholar
  30. 30.
    Panescu D, Webster JG, Tompkins WJ, and Stratbucker RA. Optimization of transcutaneous cardiac pacing by three-dimensional finite element modeling of the human thorax. Med Biol Eng Comput 1995; 33(6); 769–775.PubMedCrossRefGoogle Scholar
  31. 31.
    Panescu D, Webster JG, and Stratbucker RA. Modeling current density distribution during transcutaneous cardiac pacing. IEEE Trans Biomed Eng 1994; 41(6); 549–555.PubMedCrossRefGoogle Scholar
  32. 32.
    Deale OC and Lerman BB. Intrathoracic current flow during transthoracic defibrillation in dogs. Circ Res 1990; 67(6); 1405–1419.PubMedGoogle Scholar
  33. 33.
    TASER International, “Facts.” Available at:

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Chief Technical Officer with NewCardio, Inc.Santa Clara

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