Relevance of stimulus duration for activation of motor and sensory fibers: implications for the study of H-reflexes and magnetic stimulation - PubMed (original) (raw)
Relevance of stimulus duration for activation of motor and sensory fibers: implications for the study of H-reflexes and magnetic stimulation
M Panizza et al. Electroencephalogr Clin Neurophysiol. 1992 Feb.
Abstract
Electric stimuli with durations of 0.5-1.0 msec are optimal for studies of H-reflexes. It is more difficult to obtain H-reflexes with shorter duration stimuli or with magnetic stimulation. In order to understand this behavior, we studied the excitation thresholds for motor and sensory fibers in the ulnar, median and tibial nerves using both electric and magnetic stimulation. For short duration electrical stimuli (0.1 msec) the threshold for motor fibers is lower than for sensory fibers. For longer duration electric stimuli (1.0 msec) the threshold for sensory fibers is lower. For magnetic stimulation the threshold for motor fibers is much lower than for sensory fibers. Thus, stimulus duration is a critical parameter for sensory fiber excitation, and current magnetic stimulators are not optimal.
Similar articles
- The time constants of motor and sensory peripheral nerve fibers measured with the method of latent addition.
Panizza M, Nilsson J, Roth BJ, Rothwell J, Hallett M. Panizza M, et al. Electroencephalogr Clin Neurophysiol. 1994 Apr;93(2):147-54. doi: 10.1016/0168-5597(94)90078-7. Electroencephalogr Clin Neurophysiol. 1994. PMID: 7512921 - Magnetic stimulation of peripheral nerve; site of stimulation estimated from H reflex.
Oishi M, Takasu T. Oishi M, et al. Electromyogr Clin Neurophysiol. 1992 Jan-Feb;32(1-2):81-5. Electromyogr Clin Neurophysiol. 1992. PMID: 1541250 - Determining the site of stimulation during magnetic stimulation of a peripheral nerve.
Nilsson J, Panizza M, Roth BJ, Basser PJ, Cohen LG, Caruso G, Hallett M. Nilsson J, et al. Electroencephalogr Clin Neurophysiol. 1992 Aug;85(4):253-64. doi: 10.1016/0168-5597(92)90114-q. Electroencephalogr Clin Neurophysiol. 1992. PMID: 1380913 - Peripheral nerve stimulation by induced electric currents: exposure to time-varying magnetic fields.
Reilly JP. Reilly JP. Med Biol Eng Comput. 1989 Mar;27(2):101-10. doi: 10.1007/BF02446217. Med Biol Eng Comput. 1989. PMID: 2689806 Review. - Theoretical evaluation of peripheral nerve stimulation during MRI with an implanted spinal fusion stimulator.
Reilly JP, Diamant AM. Reilly JP, et al. Magn Reson Imaging. 1997;15(10):1145-56. doi: 10.1016/s0730-725x(97)00162-8. Magn Reson Imaging. 1997. PMID: 9408135 Review.
Cited by
- Heteronymous feedback from quadriceps onto soleus in stroke survivors.
Cuadra C, Wolf SL, Lyle MA. Cuadra C, et al. Res Sq [Preprint]. 2024 Jun 27:rs.3.rs-4540327. doi: 10.21203/rs.3.rs-4540327/v1. Res Sq. 2024. PMID: 38978589 Free PMC article. Preprint. - Treatment of Upper Limb Paresis With Repetitive Peripheral Nerve Sensory Stimulation and Motor Training: Study Protocol for a Randomized Controlled Trial.
Conforto AB, Machado AG, Menezes I, Ribeiro NHV, Luccas R, Pires DS, Leite CDC, Plow EB, Cohen LG. Conforto AB, et al. Front Neurol. 2020 Mar 25;11:196. doi: 10.3389/fneur.2020.00196. eCollection 2020. Front Neurol. 2020. PMID: 32269549 Free PMC article. - The hoffmann reflex: methodologic considerations and applications for use in sports medicine and athletic training research.
Palmieri RM, Ingersoll CD, Hoffman MA. Palmieri RM, et al. J Athl Train. 2004 Jul;39(3):268-77. J Athl Train. 2004. PMID: 16558683 Free PMC article. - Intramuscular Electrical Stimulation for the Treatment of Trigger Points in Patients with Chronic Migraine: A Protocol for a Pilot Study Using a Single-Case Experimental Design.
Perreault T, Arendt-Nielson L, Fernández-de-Las-Peñas C, Dommerholt J, Herrero P, Hubbard R. Perreault T, et al. Medicina (Kaunas). 2023 Jul 28;59(8):1380. doi: 10.3390/medicina59081380. Medicina (Kaunas). 2023. PMID: 37629671 Free PMC article. - Pre-synaptic modulation of quadriceps arthrogenic muscle inhibition.
Palmieri RM, Weltman A, Edwards JE, Tom JA, Saliba EN, Mistry DJ, Ingersoll CD. Palmieri RM, et al. Knee Surg Sports Traumatol Arthrosc. 2005 Jul;13(5):370-6. doi: 10.1007/s00167-004-0547-z. Epub 2005 Feb 1. Knee Surg Sports Traumatol Arthrosc. 2005. PMID: 15685462 Clinical Trial.
MeSH terms
LinkOut - more resources
Other Literature Sources