|
KMID : 0355219970220010145
|
|
Journal of Korean Academy Oral Medicine
1997 Volume.22 No. 1 p.145 ~ p.156
|
|
|
EMG Power Spectral Analysis on Masticatory Muscle Fatigue in Chronic Muscle Pain Patients.
|
|
|
|
|
Abstract
|
|
|
The purpose of this study was to compare differences in endurance time and EMG power spectral characteristics of the masticatory muscles during sustained isomeric contraction between patients and controls.
15 CMD patients(8 women and 7 men, aged 15 to 38 years(24.1±7.5)), and 15 healthy volunteers(8 women and 7 men, aged 15 to 30 years(24.7±3.4)) without past history or present symptoms of CMD were included in this study. Sustained isometric contractions of masticatory muscles were performed as long as possible at 5090 level of maximum voluntary contr tion(MVC) of EMG activity via visual feedback, and the duration of sustained isometric contraction(end~.aance time) was examined The author performed EMG power spectral analysis in the myoelectric signals of masseter and anterior temporal muscles during sustained isometric contraction * in CMD patients with chronic muscle pain and healthy controls.
The author came to following conclusions from the results.
1. The endurance time of the patient group was shorter than the control group in sustained isometric contraction of masticatory muscles(p<0.01).
2. MF values of masticatory muscles with sustained isometric contraction during endurance time were decreased following regression line in both groups(p<0.01, r>0.9).
3. The amount of MF shift to lower frequency range exhibited no significant differences between the patient and the control group in sustained isometric contraction during endurance time.
4. SMF to lower frequency range of the patient group was steeper than the control group in sustained isometric contraction during endurance time(p<0.05).
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
 
|
|
|
Listed journal information
|
|
|