Table 8.

Correlation of the ultrasonographic cross-sectional thickness of the masseter, anterior temporalis and orbicularis oris muscles in the contracted state with amplitude of electromyography in Groups I–IV and the control group

Group	Masseter muscle		Anterior temporalis muscle		Orbicularis oris muscle
	Correlation (r)	p-value	Correlation (r)	p-value	Correlation (r)	p-value
Group I	0.05	0.89, NS, p > 0.05	−0.13	0.72, NS, p > 0.05	−0.36	0.30, NS, p > 0.05
Group II	0.36	0.29, NS, p > 0.05	0.32	0.35, NS, p > 0.05	0.08	0.81, NS, p > 0.05
Group III	0.49	0.15, NS, p > 0.05	−0.07	0.84, NS, p > 0.05	0.30	0.38, NS, p > 0.05
Group IV	−0.75	0.01, S, p < 0.05	−0.32	0.35, NS, p > 0.05	0.003	0.99, NS, p > 0.05
Control group	−0.03	0.89, NS, p > 0.05	0.19	0.41, NS, p > 0.05	−0.05	0.82, NS, p > 0.05

NS, not significant; S, significant.