A preliminary analysis of EMG variance as an index of change in EMG biofeedback treatment of tension-type headache
The effectiveness of EMG biofeedback training for tension headache has been well established. Previous studies evaluating changes in an average EMG activity score from pre- to posttreatment have not consistently found a relationship between a reduction in average EMG activity and headache improvemen...
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| Veröffentlicht in: | Applied psychophysiology and biofeedback 2003-09, Vol.28 (3), p.205-215 |
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| container_title | Applied psychophysiology and biofeedback |
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| creator | ROKICKI, Lori A HOULE, Timothy T DHINGRA, Lara K WEINLAND, Stephan R URBAN, Amanda M BHALLA, Rishi K |
| description | The effectiveness of EMG biofeedback training for tension headache has been well established. Previous studies evaluating changes in an average EMG activity score from pre- to posttreatment have not consistently found a relationship between a reduction in average EMG activity and headache improvement at posttreatment. The current study is a preliminary analysis of the utility of EMG variance as another possible mechanism of change. Frontalis EMG average activity and variances from 6 chronic tension-type headache sufferers who demonstrated significant improvement in headache activity at posttreatment (at least 70%) and 6 chronic tension-type headache sufferes who did not demonstrate improvement (less than 30%) were examined across 6 sessions of biofeedback treatment. The improved group demonstrated larger time-specific EMG variance in relation to mean EMG amplitudes during all treatment sessions. A dramatic decline in time-specific variance was observed during the later treatment sessions for improved participants; this pattern was not observed in the group who demonstrated little or no improvement. Results from the current study suggest that the inclusion of both average EMG activity and EMG variance may provide a more comprehensive measure to evaluate possible physiological changes responsible for improvement in headache activity following EMG biofeedback training. |
| doi_str_mv | 10.1023/A:1024633230584 |
| format | Article |
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Previous studies evaluating changes in an average EMG activity score from pre- to posttreatment have not consistently found a relationship between a reduction in average EMG activity and headache improvement at posttreatment. The current study is a preliminary analysis of the utility of EMG variance as another possible mechanism of change. Frontalis EMG average activity and variances from 6 chronic tension-type headache sufferers who demonstrated significant improvement in headache activity at posttreatment (at least 70%) and 6 chronic tension-type headache sufferes who did not demonstrate improvement (less than 30%) were examined across 6 sessions of biofeedback treatment. The improved group demonstrated larger time-specific EMG variance in relation to mean EMG amplitudes during all treatment sessions. A dramatic decline in time-specific variance was observed during the later treatment sessions for improved participants; this pattern was not observed in the group who demonstrated little or no improvement. Results from the current study suggest that the inclusion of both average EMG activity and EMG variance may provide a more comprehensive measure to evaluate possible physiological changes responsible for improvement in headache activity following EMG biofeedback training.</description><identifier>ISSN: 1090-0586</identifier><identifier>EISSN: 1573-3270</identifier><identifier>DOI: 10.1023/A:1024633230584</identifier><identifier>PMID: 12964452</identifier><identifier>CODEN: APSBFZ</identifier><language>eng</language><publisher>Heidelberg: Springer</publisher><subject>Adolescent ; Adult ; Biofeedback, Psychology ; Biological and medical sciences ; Electromyography ; Endpoint Determination ; Female ; Humans ; Male ; Medical sciences ; Psychology. Psychoanalysis. 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Previous studies evaluating changes in an average EMG activity score from pre- to posttreatment have not consistently found a relationship between a reduction in average EMG activity and headache improvement at posttreatment. The current study is a preliminary analysis of the utility of EMG variance as another possible mechanism of change. Frontalis EMG average activity and variances from 6 chronic tension-type headache sufferers who demonstrated significant improvement in headache activity at posttreatment (at least 70%) and 6 chronic tension-type headache sufferes who did not demonstrate improvement (less than 30%) were examined across 6 sessions of biofeedback treatment. The improved group demonstrated larger time-specific EMG variance in relation to mean EMG amplitudes during all treatment sessions. A dramatic decline in time-specific variance was observed during the later treatment sessions for improved participants; this pattern was not observed in the group who demonstrated little or no improvement. Results from the current study suggest that the inclusion of both average EMG activity and EMG variance may provide a more comprehensive measure to evaluate possible physiological changes responsible for improvement in headache activity following EMG biofeedback training.</description><subject>Adolescent</subject><subject>Adult</subject><subject>Biofeedback, Psychology</subject><subject>Biological and medical sciences</subject><subject>Electromyography</subject><subject>Endpoint Determination</subject><subject>Female</subject><subject>Humans</subject><subject>Male</subject><subject>Medical sciences</subject><subject>Psychology. Psychoanalysis. Psychiatry</subject><subject>Psychopathology. Psychiatry</subject><subject>Relaxation. Biofeedback. Hypnosis. Selfregulation. 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Previous studies evaluating changes in an average EMG activity score from pre- to posttreatment have not consistently found a relationship between a reduction in average EMG activity and headache improvement at posttreatment. The current study is a preliminary analysis of the utility of EMG variance as another possible mechanism of change. Frontalis EMG average activity and variances from 6 chronic tension-type headache sufferers who demonstrated significant improvement in headache activity at posttreatment (at least 70%) and 6 chronic tension-type headache sufferes who did not demonstrate improvement (less than 30%) were examined across 6 sessions of biofeedback treatment. The improved group demonstrated larger time-specific EMG variance in relation to mean EMG amplitudes during all treatment sessions. A dramatic decline in time-specific variance was observed during the later treatment sessions for improved participants; this pattern was not observed in the group who demonstrated little or no improvement. Results from the current study suggest that the inclusion of both average EMG activity and EMG variance may provide a more comprehensive measure to evaluate possible physiological changes responsible for improvement in headache activity following EMG biofeedback training.</abstract><cop>Heidelberg</cop><pub>Springer</pub><pmid>12964452</pmid><doi>10.1023/A:1024633230584</doi><tpages>11</tpages></addata></record> |
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| subjects | Adolescent Adult Biofeedback, Psychology Biological and medical sciences Electromyography Endpoint Determination Female Humans Male Medical sciences Psychology. Psychoanalysis. Psychiatry Psychopathology. Psychiatry Relaxation. Biofeedback. Hypnosis. Selfregulation. Meditation Reproducibility of Results Tension-Type Headache - psychology Tension-Type Headache - therapy Treatment Outcome Treatments |
| title | A preliminary analysis of EMG variance as an index of change in EMG biofeedback treatment of tension-type headache |
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