Electromyography as a Means of Assessing Masticatory Muscle Activity in Patients with Pain-Related Temporomandibular Disorders

Table 4

Electrical activity of the temporalis and masseter muscles during maximum voluntary contraction (MVC) for the examined groups of children.

Region	Variable	Gender	TMD-pain group			Pain-free TMD group			Non-TMD group
			n	Mean	SD	n	Mean	SD	n	Mean	SD
TA	EA	Girls	16	101.80	29.80	14	113.70	35.50	15	130.00	35.20
		Boys	14	94.70	21.60	16	115.00	27.80	15	129.10	51.20
		Total	30	98.49	31.61	30	114.38	31.09	30	129.57	43.20
	AI	Girls	16	14.74	8.58	14	11.29	5.51	15	16.56	9.83
		Boys	14	7.86	4.99	16	9.59	4.82	15	9.24	5.03
		Total	30	11.53	7.90	30	10.38	5.01	30	12.90	6.80
MM	EA	Girls	16	96.20	28.80	14	110.20	43.70	15	118.50	25.20
		Boys	14	94.50	29.40	16	102.10	32.60	15	120.40	45.90
		Total	30	95.42	28.58	30	105.88	37.71	30	119.43	36.42
	AI	Girls	16	13.85	8.95	14	9.41	5.65	15	9.24	6.83
		Boys	14	9.51	5.49	16	6.10	4.09	15	7.27	4.54
		Total	30	11.82	6.26	30	7.64	4.08	30	8.26	4.59

TA: temporalis anterior muscles; MM: masseter muscles; EA: electrical activity (μV/μV%); AI: asymmetry index (%).