In Study 1, normative data were collected on masseter muscle activity in 25 MPDS and 25 nonMPDS patients to determine if there were significant differences in overall EMG activity, and if there was a significant difference between left and right EMG activity in either or both groups. Data were collected using a Myotronics EM2 Electromyograph. Masseter EMG levels were in the predicted direction (MPDS $>$ nonMPDS), but the difference between the groups was not significant. There was a significant difference between left and right masseter activity for both groups. However, there was no difference between groups in the magnitude of the bilateral differential. In Study 2, the effectiveness of unilateral, bilateral, and false feedback in reducing masseter EMG activity were compared. Sixty-five subjects received 20 minutes of biofeedback during two training sessions. A follow-up session was conducted one week after treatment completion. Perceived jaw and general muscle tension were also assessed using a SUDS-type scale. Data were collected using a Cyborg Biolab and an Apple II plus computer. Results showed that for all groups, EMG activity decreased from session one to session two. There was no difference between the unilateral and bilateral group in the amount of EMG reduction across the two experimental sessions. The reduction of EMG activity across sessions one and two was significantly greater for the unilateral + bilateral group as compared to the false feedback group. Treatment effects maintained at the follow-up session for subjects in the bilateral + unilateral group, but not for the false feedback group. EMG activity in the unilateral + bilateral group decreased significantly from session two to the follow-up session, whereas EMG activity for the false feedback group increased from session two to the follow-up. For the subjective measures of jaw and / general muscle tension, the changes in ratings across sessions did not differ as a function of feedback group. There were no significant correlations between EMG activity and muscle tension ratings for the unilateral + bilateral group or for the false feedback group. / Source: Dissertation Abstracts International, Volume: 52-03, Section: B, page: 1726. / Major Professor: Jack G. May, Jr. / Thesis (Ph.D.)--The Florida State University, 1990.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_78443 |
| Contributors | Linden, Terri Ann., Florida State University |
| Source Sets | Florida State University |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | 116 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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