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Biomedical subjects

J O Bailey

Publications and source records attributed to J O Bailey.

13 recordsLinked to original sources
PubMed1995

Occlusal adjustment.

Only an overview of the techniques for occlusal adjustment has been presented. A more thorough explanation can be found in the text Occlusion by Ramfjord and Ash, on which most of this material is based.

Bruxism↗
PubMed1985

Evaluation of the effect of anxiety on the masseteric silent period duration.

The duration of the masseteric silent period (SPD) and environmental stress are parameters which have been associated with the symptoms of masticatory dysfunction. In this study, the relationship between differing levels of anxiety and the masseteric silent period duration, for nineteen subjects reporting a history of symptoms of mandibular dysfunction, was evaluated by a stress model based on the Sta X-1 anxiety test. The results suggest that the durations of masseteric silent periods were not significantly affected by differing levels of anxiety.

Anxiety↗
PubMed1981

The effect of bite force on the duration and latency of the menton tap silent period.

The purpose of this research was to investigate the effect of bite force changes on the duration and latency of the menton tap silent period and particularly whether a decrease in bite force can increase the duration of the silent period to the extent which may be found in dysfunctional patients. The menton tap silent period was recorded from both anterior temporal and masseter muscles while the subject was clenching at different force levels. A bilaterally stable force transducer was used to monitor the clenching force. The results indicated no statistically significant differences in the mean durations and latencies of silent periods at different clenching forces. They suggest that duration and latency are not related to the degree of clenching force.

Adult↗
PubMed1979

The role of cutaneous receptors in the menton tap silent period.

The neuromuscular mechanisms of the electromyographic silent period are poorly understood but clinically significant. Our purpose was to isolate the contribution of cutaneous afferents from the chin to the latency and the duration of the EMG silent period. Under the conditions of our experiment, the afferents of the mental nerve have no observable influence on the latency or the duration of the silent period educed by a menton tap.

Adult↗
PubMed1979

Correlations of electromyographic silent period duration and the Helkimo dysfunction index.

Fifty-eight patients seen for consultation concerning mandibular dysfunction symptoms were examined utilizing the Helkimo index of dysfunction and electromyographic silent period recordings from masticatory muscles. The data collected were analyzed for correlations between the two parameters. Several significant correlations were noted between certain variables of the dysfunction index and the duration of the silent period. The mean duration of the silent period increased with increasing dysfunction index value. However, the clinical significance of this correlation is not established as long as we do not know the validity of neither the dysfunction index nor the the EMG silent period duration.

Adult↗
PubMed1978

A comparison of biofeedback and occlusal adjustment on bruxism.

Within the limits of this study and with the reported assumption that the recorded EMG activity is related to bruxism, the results of this investigation suggest that the effect of biofeedback in reducing EMG activity is more consistent than an occlusal adjustment, possibly due to differences in the cause of the initial heightened EMG activity in the group of subjects studied.

Adolescent↗
PubMed1977

Electromyographic silent periods and jaw motion parameters: quantitative measures of temporomandibular joint dysfunction.

The purpose of this research was to compare, in the subjects, the duration of the EMG silent period with jaw motion error. The results indicate that both jaw motion error and silent period duration are large in patients with TMJ-muscle-pain dysfunction, both are small in normal subjects, and both are small in successfully treated patients. There is a statistically significant correlation (r=0.91; P less than 0.01) between the two diagnostic parameters of TMJ-muscle-pain dysfunction.

Electromyography↗