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Biomedical subjects

H Broman

Publications and source records attributed to H Broman.

27 records · Page 2Linked to original sources
PubMed1981

Evaluation and prediction of regenerative processes by quantitative analysis of the electromyographic response and biofeedback in peripheral nerve injuries.

The purpose of this study was to quantitatively and objectively evaluate and monitor regenerative processes in peripheral nerve lesions using a new electrophysiological method, and to develop and evaluate an electromyographic (EMG) biofeedback training programme for the rehabilitation of patients with such injuries. Five patients with traumatic unilateral brachial plexus injuries participated in the study longitudinally on a twice-weekly basis. The electrophysiological method was based on quantitative on-line analyses of the myoelectric signal from affected muscles of the upper limb. The biofeedback programme was developed and used to: (1) increase maximum voluntary centrally mediated neuromuscular activity; (2) dissociate desired and interfering neuromuscular activity; and (3) improve patient control over the neuromuscular activity. The electrophysiological results have differentiated clearly between muscles where regeneration can be assumed to be in progress and muscles where it is not in progress. This differentiation can be made prior to the occurrence of any observable contraction in muscle under study. The biofeedback training resulted in improved neuromuscular function in all patients.

Brachial Plexus↗
PubMed1975

The sitting posture: an electromyographic and discometric study.

The disc pressure of the third lumbar disc and the myoelectric activity of several muscles of the back were measured. Three standing and nine unsupported sitting positions were studied as well as eight support parameters and six sedentary tasks. 1. Myoelectric activity is about the same in standing and in relaxed unsupported sitting. In the unsupported sitting positions the highest level of activity is found in anterior sitting and the lowest in posterior sitting. In the muscles of the cervical and lumbar regions the activity is always lower than in the muscles of the thoracic region. The disc pressure is considerably higher in unsupported sitting than in standing. In the unsupported sitting positions the highest disc pressure is found in anterior sitting and the lowest in sitting straight. 2. Both the myoelectric activity and the disc pressure decrease when the back is supported. Of the support parameters, the backrest inclination is the most important, myoelectric activity and disc pressure both decreasing with an increase in inclination. The disc pressure is considerably reduced also when the lumbar support is increased and when armrests are used. 3. Myoelectric activity and disc pressure are both comparatively low in writing, higher in typing, and still higher in lifting. In the car driver's seat the disc pressure increases both when the gear is shifted and when the clutch pedal is depressed. When the gear is shifted, there is also an increase in myoelectric activity.

Adult↗