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ISSN 2522-9028 (Print)
ISSN 2522-9036 (Online)
DOI: https://doi.org/10.15407/fz

Fiziologichnyi Zhurnal

is a scientific journal issued by the

Bogomoletz Institute of Physiology
National Academy of Sciences of Ukraine

Editor-in-chief: V.F. Sagach

The journal was founded in 1955 as
1955 – 1977 "Fiziolohichnyi zhurnal" (ISSN 0015 – 3311)
1978 – 1993 "Fiziologicheskii zhurnal" (ISSN 0201 – 8489)
1994 – 2016 "Fiziolohichnyi zhurnal" (ISSN 0201 – 8489)
2017 – "Fiziolohichnyi zhurnal" (ISSN 2522-9028)

Fiziol. Zh. 2019; 65(4): 59-65


CHANGES IN PHYSIOLOGICAL TREMOR PARAMETERS OF THE BRUSH FOR DIFFERENT HUMAN UPPER LIMB MUSCLE ACTIVITY

I.Yu. Gnatchuk, V. V. Manko

  1. Ivan Franko National University of Lviv, Ukraine
DOI: https://doi.org/10.15407/fz65.04.059

Abstract

Influence of different types of activity of muscles of the upper limb on the frequency and amplitude of physiological tremor in 40 females of 18-19 years old was investigated. Tests were carried out in two positions of the brush (palm down and palm rib down) as well as in three positions (at rest, in postural condition, and during loading). In the position of the brush with the palm down in the rest, the frequency of the physiological tremor was along the x-axis 7.74±0.28 Hz, y-axis - 7.38±0.34 Hz, z-axis - 7.47±0.22 Hz, whereas the amplitude was 0.12±0.01, 0.22±0.02 and 0.24±0.02 mm, respectively. As a result of displacement of the brush to the postural condition, the frequency of physiological tremor increased along the z-axis, which coincides with the force of gravity, to 8.10±0.18 Hz, and the amplitude increased along three axes by 33%, 90%, and 216%, respectively. Applying the load 100 and 200 g led to a decrease in the frequency and amplitude of the physiological tremor in this position of the brush. In the position of the brush with a palm rib down, the frequency data also varied only along the axis, which coincides with the force of gravity, whereas changes in the amplitude were not detected, which is explained by the features of the radial-wrist joint structure. The results could be explained by different activity and alternation of the muscles involved in the work when maintaining the brush in a given position. Consequently, in the state of rest, regardless of the position of the brush, the muscle tone supporting the radial-wrist joint practically does not affect the frequency and amplitude of the physiological tremor. When transferring the limb to the postural condition, in both cases, statistically significant changes in the frequency of the physiological tremor are observed only along the axis, which coincides with the force of gravity. The tremor amplitude also depends on the load of the limb, but only in the position of the hand with the palm down.

Keywords: physiological tremor; frequency and amplitude of physiological tremor; hand brush position; load; radiocarpal joint; accelerometer

References

  1. McAuley J, Rothwell J, Marsden C. Frequency peaks of tremor, muscle vibration and electromyographic activity at 10 Hz, 20 Hz and 40 Hz during human finger muscle contraction may reflect rhythmicities of central neural firing. Exp Brain Res. 1997;114(3):525-41. CrossRef PubMed
  2.  
  3. Elble R, Randal G. Mechanistic components of normal hand tremor. Electroencephalogr Clin Neurophysiol. 1978;44(1):72-82. 3. HoYomberg V, Hefter H, Reiners K, Freund H. Differential effects of changes in mechanical limb properties on physiological and pathological tremor. J Neurol Neurosurg Psychiatry. 1987; 50(5):568-79. CrossRef PubMed PubMedCentral
  4.  
  5. Stiles R, Randall J. Mechanical factors in human tremor frequency. J Appl Physiol. 1967;23(3):324-30. CrossRef PubMed
  6.  
  7. Andrade A. Practical applications in biomedical engineering. London: IntechOpen; 2013. Chapter 2. Human Tremor: Origins, Detection and Quantification: 1-24.
  8.  
  9. Takanokura M, Sakamoto K, Neuromuscular control of physiological tremor during elastic load. Med Sci Monit. 2005;11(4):CR143-52.
  10.  
  11. Sturman M, Vaillancourt D, Corcos D. Effects of aging on the regularity of physiological tremor. J Neurophysiol. 2005;93(6):3064-74. CrossRef PubMed
  12.  
  13. Lakie M, Vernooij C, Osborne T, Reynolds R. The resonant component of human physiological hand tremor is altered by slow voluntary movements. J Physiol. 2012;590(10):2471-83. CrossRef PubMed PubMedCentral
  14.  
  15. Duval C, Jones J. Assessment of the amplitude of oscillations associated with high-frequency components of physiological tremor: impact of loading and signal diferentiation. Exp Brain Res. 2005;163:261-6. CrossRef PubMed
  16.  
  17. Marsden C, Meadows J, Lange G, Watson R. The relation between physiological tremor of the two hands in healthy subjects. Electroenceph Clin Neurophysiol. 1969;27(2):179-85. CrossRef  
  18. Raethjen J, Pawlas F, Lindemann M, Wenzelburger R, Deuschl G. Determinants of physiologic tremor in a large normal population. Clin Neurophysiol. 2000;111(10):1825-37. CrossRef  
  19. Yazdi N, Farrokh A, Khalil N. Micromachined inertial sensors. Proc. IEEE. 1998;86:1640-59. CrossRef  
  20. Vernooij C, Reynolds R, Lakie M. A dominant role for mechanical resonance in physiological finger tremor revealed by selective minimization of voluntary drive and movement. J Neurophysiol. 2013;109(9):2317-26. CrossRef PubMed
  21.  
  22. Mehta A, Brittain J, Brown P. The selective influence of rhythmic cortical versus cerebellar transcranial stimulation on human physiological tremor. J Neurosci. 2014; 34(22):7501-8. CrossRef PubMed PubMedCentral
  23.  
  24. Hulka O. Dynamics of spectral indexes of heart variability rate of the students with different character of the educational loading. Fiziol Zh. 2015;61(4):98-104. [Ukrainian]. CrossRef PubMed
  25.  
  26. Crawford P, Zimmerman E. Tremor: Sorting Through the Differential Diagnosis. Am Fam Physician. 2018 Feb 1;97(3):180-6.
  27.  
  28. Kapanji A. Upper limb. Physiology of the joints. Moscow; 2009. [Russian].
  29.  
  30. Deuschl G, Bain P, Brin M. Consensus statement of the movement disorder society on tremor. Ad hoc scientific committee. Mov Disord. 1998;13 Suppl 3:2-23. CrossRef  
  31. Deuschl G, Raethjen J, Lindemann M, Krack P. The pathophysiology of tremor. Muscle Nerve. 2001;24(6):716-35. CrossRef PubMed
  32.  
  33. McAuley J, Marsden C. Physiological and pathological tremors and rhythmic central motor control. Brain. 2000;123 (Pt 8):1545-67. CrossRef PubMed
  34.  
  35. Hagbarth K, Young R. Participation of the stretch reflex in human physiological tremor. Brain. 1979;102(3):509-26. CrossRef PubMed
  36.  
  37. Williams E, Soteropoulos D, Baker S. Spinal interneuron circuits reduce approximately 10-Hz movement discontinuities by phase cancellation. Proc Natl Acad Sci USA. 2010;107(24):11098-103. CrossRef PubMed PubMedCentral

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