Mercyful quantitative comparison between : temporalis & masseter muscles in : women & men dentate persons by : power spectrum analysis of EMG parameters

الملخص EN

This study accomplished by using the power spectrum analysis of EMG parameters registered by surface electrodes secured on major bulk center of anterior temporalis and masseter muscles of (12) women dentate persons and (16) men dentate persons with age range (48-58) years.

The results were obtained and statistically analyzed to compare the values of amplitude and frequency parameters obtained from each subject groups during clenching in maximum intercuspation position (MIP), right lateral position (RLP) and left lateral position (LLP) and, also, during chewing (3) grams of peanuts and (5) one cubic centimeter pieces of carrot.

The quantitative comparison showed that the men dentate persons registered higher amplitude values than women dentate persons, and that indicate the presence of large size motor units, in temporalis and masseter muscles of men subjects, which were responsible for the registration of the higher values by synchronization of motor unit action potentials.

Whereas, the frequency parameters of the two subject groups showed no significant differences which means the number of the motor units and firing phases are almost the same.

These results can be utilized in 1.

understanding the behavior of masticatory muscles in older ages dentate persons before losing the teeth.

2.

Keeping the registered parameter values to be restored when designing the future partial or complete denture.

3.

treating any problem occur in masticatory muscles.