Visual Input Effect on EMG Activity of Sternocleidomastoid and Masseter Muscles in Healthy Subjects and in Patients with Myogenic Cranio-Cervical-Mandibular Dysfunction

Effects of myogenous facial pain on muscle activity of head and neck

“…The results of sEMG activity at rest observed in the healthy group, comparing closed and open eye conditions, agree with those of HOLMGREN et al 8 who did not find any significant change in resting masseter activity when visual input was varied, and disagree with the studies of MIRALLES that found a significant decrease in sEMG values of the above mentioned muscles in the closed eye condition 19 . Different methods could explain the discrepancy between the present results and those of MIRALLES.…”

“…sEMG activity could show such adaptation. With the eyes open, a significant increase in rest sEMG activity was observed in the temporal anterioris muscles 11,19,28 . The visual input effect on the sEMG activity of the sternocleidomastoid and masseter muscles at rest has also been proved 29 .…”

Measurement and analysis of surface electromyographic signals on patients wearing eyeglasses

“…The goal of the present research activity is the analysis of the surface electromyographic signals on patients wearing eyeglasses [8,9,10,11]. In detail, our experimental activity has been focused on the acquisition and analysis of the left anterior temporal muscle SEMG signals in rest mandible conditions, in occurrence with some particular voluntary and involuntary movements of the patient, such as closed-open eyes condition; those signals cannot be acquired with a traditional SEMG measurement apparatus, because of the presence of pass-band filters and of the electronic noise, which could mask the closedopen eyes effect [1,2,12].…”

New Measurement Techniques of Surface Electromyographic Signals in Rest Position for Application in the Ophthalmological Field

“…The goal of the present research is the analysis of the surface electromyographic signals on patients wearing eyeglasses (Miralles et al, 1998;Kawamura, 1967;Shahani, 1977;). In detail, our experimental activity has been focused on the acquisition and analysis of the SEMG signals of anterior temporalis muscles at mandible rest conditions, in occurrence with some particular voluntary and involuntary movements of the patient, such as closed-open eyes condition; those signals can not be acquired with a traditional SEMG measurement apparatus, because of the presence of pass-band filters and of the electronic noise, which could mask the closed-open eyes effect (Airi Oksanen et al, 2007;Sharifi et al, 1998).…”

“…Those signals varied by subject, but were constant for the same person, during the same recording session www.intechopen.com EMG Methods for Evaluating Muscle and Nerve Function 510 and without changing the recording apparatus or the electrodes themselves; furthermore, this variation was independent from the state of the eyes. In the electromyographic measurement practice, keeping open or closed the eyes is usually required for about 15 s at a time (Miralles et al, 1998;Kawamura, 1967). From the preliminary measurements, the voltage amplitude of the investigated signals seems to be related to the sequence of the open-eyes and closed-eyes conditions.…”