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N Matai

Publications and source records attributed to N Matai.

6 recordsLinked to original sources
PubMed1989

[Aging and tongue skill. Ultrasound (motion-mode) evaluation].

In order to investigate tongue skill, upward and downward tongue movements with two constant frequencies were observed by using an ultrasound system in young and elderly adults. Upward and downward movements in accordance with a metronome were recorded by ultrasound recorder from the Motion-mode. Movement rhythm and movement velocity of the tongue were compared in the two age groups. The main findings were: 1. The ultrasound system with 5 MHz ultrasound convex transducer and Motion-mode observation produced clear traces of the tongue surfaces in the sagital plane during upward and downward movements. 2. Upward and downward movement rhythms in the elderly were more irregular than those of young adults. 3. Velocity of tongue upward and downward movements were statistically decreased in the elderly (p less than 0.01). Velocity did not clearly change if the movement speed was different in the elderly. Results of this study revealed that oral motor behaviour in the elderly differed from that of young adults.

Adult↗
PubMed1985

Masticatory rhythm analyzing method and clinical application.

The rhythm of mastication is one of the important factors in evaluating the masticatory function. This masticatory rhythm should be observed from both the mandibular movements and masticatory muscular activities. In addition, the changes in the rhythm from the beginning to the end of the mastication process should be reflected by the chosen parameters. In order to achieve this, a new analyzing method was devised in which the electromyographic burst duration time was divided into three divisions based upon the mandibular movement phase, and two parameters were chosen to represent the rhythm. In this paper, the new method was used on the patients with a temporomandibular joint dysfunction and patients who had a mandibular segmental resection in order to evaluate its validity and clinical applicability. By the comparison of the masticatory rhythms before and after treatment, the effectiveness of this analyzing method in evaluating the masticatory functions was shown.

Adult↗