ASSESSMENT AND COMPARISON OF F WAVE AND H REFLEX LATENCIES OF SOLEUS MUSCLE IN NORMAL SUBJECTS

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ALAVIAN GHAVANINI M.R.; HAJI ALIASGAR SH.; AKRAMI SH.

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Journal: JOURNAL OF MEDICAL RESEARCH (JMR) Year:2003 | Volume:1 | Issue:3 Page(s): 50-55

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Title

ASSESSMENT AND COMPARISON OF F WAVE AND H REFLEX LATENCIES OF SOLEUS MUSCLE IN NORMAL SUBJECTS

Author(s)

ALAVIAN GHAVANINI M.R. | HAJI ALIASGAR SH. | AKRAMI SH. | Issue Writer Certificate

Keywords

F WAVEQ4

H REFLEXQ4

NERVE CONDUCTION VELOCITYQ4

Abstract

Background: Afferent and efferent pathways of F WAVE and efferent pathway of H REFLEX are composed of alpha motor neurons. Afferent neurons of H REFLEX are large sensory fibers. Despite the well-accepted opinion that sensory fibers generally conduct impulses faster than motor fibers, histologic examination of the peripheral nerves have revealed similar diameters for both motor and sensory nerves suggesting similar conduction velocities. Materials and Methods: In this study tibial nerves of eighty-one healthy volunteers with an age range of 20 to 30 years were stimulated in order to measure Hand F WAVE latencies of soleus muscles.. Electrodes of electromyography were in8erted in the popliteal fossa of the patients. Maximum height of H REFLEX was measured with an increasing direct current starting with 1 milliamper for one millisecond. H REFLEX latency was measured from the time of stimulation. In the same way, F WAVE and its latency was also measured. Results: Mean latency of F WAVE was 28.3 millisecond (23.2-35.6 millisecond). Mean latency of H REFLEX was 27.6 millisecond (22-30.8 millisecond). Mean difference of F and H waves (F-H) was 8 milliseconds. Turn around time for motor neuron reactivation in the spinal cord was 1 millisecond, which is at least 0.3 milliseconds shorter than synaptic transmission time of H REFLEX. Conclusion: It can be concluded that H wave conduction velocity is faster than F WAVE in healthy subjects. The findings also shown that large sensory neurons are faster than motor neurons.

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APA: Copy

ALAVIAN GHAVANINI, M.R., HAJI ALIASGAR, SH., & AKRAMI, SH.. (2003). ASSESSMENT AND COMPARISON OF F WAVE AND H REFLEX LATENCIES OF SOLEUS MUSCLE IN NORMAL SUBJECTS. JOURNAL OF MEDICAL RESEARCH (JMR), 1(3), 50-55. SID. https://sid.ir/paper/105821/en

Vancouver: Copy

ALAVIAN GHAVANINI M.R., HAJI ALIASGAR SH., AKRAMI SH.. ASSESSMENT AND COMPARISON OF F WAVE AND H REFLEX LATENCIES OF SOLEUS MUSCLE IN NORMAL SUBJECTS. JOURNAL OF MEDICAL RESEARCH (JMR)[Internet]. 2003;1(3):50-55. Available from: https://sid.ir/paper/105821/en

IEEE: Copy

M.R. ALAVIAN GHAVANINI, SH. HAJI ALIASGAR, and SH. AKRAMI, “ASSESSMENT AND COMPARISON OF F WAVE AND H REFLEX LATENCIES OF SOLEUS MUSCLE IN NORMAL SUBJECTS,” JOURNAL OF MEDICAL RESEARCH (JMR), vol. 1, no. 3, pp. 50–55, 2003, [Online]. Available: https://sid.ir/paper/105821/en

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