Journals / Romatizma Dergisi / 2000 / Cilt: 15 - Sayı: 2

Latency and amplitude of H and T reflex in the active sportsmen

Aktif sporcularda H-refleks ve T-refleks latans ve amplitüdleri

Pages
117–121
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In conclusion, the H-reflex amplitude recorded from trained muscle was significantly low and this could be due to lower number of motor neurons stimulated by type la fibers.

📌 3 Key Takeaways

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Objective & Hypothesis:The evaluation of proximal segments using classical electrophysiological methods for nerve conduction velocities is not sufficient.
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Key Findings & Data:H-reflex and T-reflex amplitude and latency values of 20 subjects (test group, 10 football player, and 10 volleyball player) who have been regularly exercising for 8.73±4.45 years and 20 students (control group) who have not been regularly exercised were measured.
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Conclusion & Impact:In conclusion, the H-reflex amplitude recorded from trained muscle was significantly low and this could be due to lower number of motor neurons stimulated by type la fibers.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Ekstremiteler · Kaslar · Kas-iskelet fizyolojisi

Abstract

The evaluation of proximal segments using classical electrophysiological methods for nerve conduction velocities is not sufficient. In this study, the effects of regular exercise on H-reflex and T-reflex amplitude and latency was investigated. H-reflex and T-reflex amplitude and latency values of 20 subjects (test group, 10 football player, and 10 volleyball player) who have been regularly exercising for 8.73±4.45 years and 20 students (control group) who have not been regularly exercised were measured. The H-reflex amplitude and latency values of test and control group were 3.71±1.6 mV and 27.98±2.16 ms; 6.83±2.23 mV and 27.69±2.0 msec, respectively. There was no statistically difference between the two groups in relation with H-reflex latencies (p>0.05). The amplitude of H-reflex was significantly higher in the control group (p<0.05). The T-reflex amplitude and latency values of test and control groups were 3.78±1.99 mV and 32.08±2.04 ms; 4.31±1.43 mV and 31.52±2.27 msec, respectively. Despite the amplitude of T-reflex was higher in the control group, the difference between the two groups with respect to amplitude and latency was not significantly different (P>0.05). There was no significant difference between volleyball and football players with respect to H and T-reflex amplitude and latency. In conclusion, the H-reflex amplitude recorded from trained muscle was significantly low and this could be due to lower number of motor neurons stimulated by type la fibers. This may be due to less efficiency of type la excitatory afferents on motor interneurones in trained subjects. Therefore, the level of exercise should be considered as an influencing parameter when evaluating the amplitude of H and T reflexes.

Özet

Elektrofizyoloji laboratuarlarında proksimal segmentlerinin klasik sinir iletim çalışması teknikleriyle değerlendirilmesi yeterli olmamaktadır. Bu çalışmada düzenli sportif faaliyetlerin H-refleks ve T-refleks latans ve amplitüdünü etkileyen bir değişken olup olmadığı araştırıldı. Bu amaçla ortalama 8.73 ± 4.45 yıldır spor yapmakta olan 20 öğrenci (10 futbolcu ve 10 voleybolcu) ile spor yapmayan 20 öğrencinin 80 alt ekstremitesinde H-refleks ve T-refleks latans ve amplitüdleri, uygun koşullar sağlanarak ölçüldü. Çalışma grubunun H-refleks amplitüdü 3.71 ±1.6 mV, latansı 27.98±2.16 ms, kontrol grubunun H-refleks amplitüdü 6.83±2.23 mV, latansı 27.69±2.0 ms bulundu. Gruplar arasında H-refleks latans ortalaması açısından fark gözlenmedi (p>0.05). Spor yapmayanlarda amplitüdün yaklaşık iki kat daha büyük olduğu ve gruplar arası farkın istatistiksel olarak anlamlı olduğu gözlendi (p 0.05). Çalışma grubu spor tipine göre karşılaştırıldığında futbolcular ve voleybolcuların H-refleks ve T-refleks verileri arasında fark bulunmadı (p>0.05). Sonuç olarak antrenmanlı kastan elde edilen H-refleks amplitüdünün antrenmansız kasa göre daha küçük bulunması tip la lifleri tarafından uyarılan motor nöron sayısının azlığına bağlı olabilir. Bu da spor yapanlarda tip la eksitatör afferentlerin ara motor nöronlar üzerindeki etkisinin az olmasından kaynaklanabilir. Bu nedenle refleks testlerin değerlendirilmesinde amplitüdü etkileyen değişkenler arasında kasın antrenman düzeyi de dikkate alınması gereken faktörlerdendir.

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Cite This Article

BULUT, S., ÖZMERDİVENLİ, R., KAMANLI, A., YOLDAŞ, T. K., KARACABEY, K., GÜNDOĞDU, C. (2000). Latency and amplitude of H and T reflex in the active sportsmen. Romatizma Dergisi, Cilt: 15 - Sayı: 2, 117–121. https://ajindex.com/articles/306078

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References (2)

  1. Stam J and Van Crevel H: Measurement of tendon reflexes by surface electromyography in normal subjects. J Neurol 1989; 236: 231-237. 2. Frijns CJM, Laman DM, Van Duijn MAJ and Van Duijn H: Normal values of patellar and ankle tendon refleks latencies. Clin Neurol Neurosurg 1997; 99:31-36 3. Kuruoglu R and Oh SJ: Ouantitation of tendon refleks in normal volunteers. Electromyogr Clin Neurophysiol 1993; 33:347-351. 4. Oh SJ: Clinical Electromyography: Nerve Conduction Studies.Second Edition.
  2. Baltimore, VVilliams & VVilkins, 1993. 5. Schimsheimer RJ, Ongerboer De Visser BW, Kemp B and Bour LJ: The flexor carpi radialis H reflex in polyneuropathy: relations to conduction velocities of the median nerve and the soleus H-reflex latency. J Neurol Neurosurg Psychiatry 1987; 50:447-452. 6. Kameyama O, Hayes KC and Wolfe D: Methodological considerations contributing to variabilfty of the quadriceps H-reflex. Am J Phis Med Rehabil 1989; 68: 277-282. 7. Simonsen EB and Dyhre-Poulsen P: Amplitude of the human soleus H-reflex during vvalking and running. J Physiol 1999; 515(3):929-939. 8. Verhagen WIM, Schrooten GJM, Schiphof PR and Van Ammers V: The H-reflex of the medial vastus muscle: a study in controls and patients with radiculopathy. EMG Clin Neurophysiol 1988; 28: 421-425. 9. Kuruoglu HR and Oh SJ: Tendon reflex testing in chronic demyelinating polyneuropathy. Muscle Nerve 1994; 17: 145-150. 10. Casabona A, Polizzi MC and Perciavalle V: Differences in Hreflex betvveen athletes trained for explosive contractions and non-trained subjects. Eur J Appl Physiol 1990; 61: 26-32. 11. Tesch PA and Karlsson J: Muscle fiber types and size in trained and untrained muscles of elite athletes. J Appl Physiol 1985; 59:1716-1720. 12. Hakkinen K, Komi PV and Alen M: Effect of explosive type strenght training on isometric force and relaxation time, electromyographic and muscle fiber characteristics of leg extensor muscles. Açta Physiol Scand 1985; 125: 587- 600. 13. Nardone A and Schieppati M: Shift of activity from slow to fast muscle during voluntary lengthening contractions of the triceps surae muscles in humans. J Physiol (Lond) 1988; 395: 363-381 14. Perot C, Goubel F and Mora I: ûuantification of T- and Hresponses before and after a period of endurance training. Eur J Appl Physiol 1991; 63: 368-375.