Electromyographic evaluation of masticatory muscles in individuals with hemiparesis and temporomandibular disorder

Figures & data

Table 1. Prevalence of temporomandibular disorder in overall sample

	Frequency	%
Without TMD	20	40
With TMD	30	60
Muscle involvement (Group I)	19	38
Disc displacement (Group II)	4	8
Joint involvement (Group III)	1	2
Mixed	6	12
TOTAL	50	100

Figure 1. Comparison of EMG signal between right and left sides in individuals with complete or incomplete hemiparesis with mandible at rest.

Notes: Significant intra-group differences in both groups; p < 0.05.

Figure 2. Comparison of EMG signal between right and left sides in individuals with complete or incomplete hemiparesis during MVC.

Notes: No significant intra-group differences in either group; p > 0.05.

Figure 3. Comparison of EMG signal between right and left sides in individuals with complete or incomplete hemiparesis during isotonic contraction.

Notes: No significant intra-group differences in either group; p > 0.05.

Table 2. Analysis of EMG signal and both gender and time since stroke (complete hemiparesis)

	Isometric		Isotonic		Rest Position
	EMG R	EMG L	EMG R	EMG L	EMG R	EMG L
Time Stroke	0.6303	0.019*	0.7373	0.7587	0.2998	0.9696
MVC (gender)
Male	0.4736	0.3729	0.454	0.8048	0.024*	0.9011
Female	0.651	0.443	0.352	0.572	0.420	0.333
MVC (without TMD)	0.5472	0.9016	0.6358	0.5281	0.959	0.7137

Notes: Spearman correlation test corrected by Bonferroni Ryan- Holm stepdonw. R = Right, L = Left.

* p = < 0.05.

Table 3. Analysis of EMG signal and both gender and time since stroke (incomplete hemiparesis)

	Isometric		Isotonic		Rest Position
	EMG R	EMG L	EMG R	EMG L	EMG R	EMG L
Time Stroke	0.1898	0.2131	0.9383	0.9545	0.7783	0.5304
MVC (gender)
Male	0.6627	0.6449	0.4281	0.4529	0.8484	0.9708
Female	0.865	0.867	0.546	0.320	0.779	0.798
MVC (without TMD)	0.6449	0.6806	0.2128	0.2032	0.9384	0.8804

Notes: Spearman correlation test corrected by Bonferroni Ryan- Holm stepdonw. R = Right, L = Left.