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Biomedical subjects

T Matsuya

Publications and source records attributed to T Matsuya.

At least 109 records · Page 6Linked to original sources
PubMed1983

Mandibular traction for relieving respiratory distress in the Pierre Robin Anomaly. A case report.

A case of Pierre Robin Anomaly with severe, prolonged respiratory distress and feeding difficulties is presented. The respiratory distress is adequately relieved by mandibular forward traction. The procedure employing a mandibular suspension and elastic traction system is described. Feeding under the traction was successful, providing more effective self-control of the tongue. The authors recommend the mandibular traction device described here as a very simple life-saving approach to the problems in the Pierre Robin Anomaly.

Airway Obstruction↗
PubMed1983

Visual training for velopharyngeal closure in cleft palate patients; a fibrescopic procedure (preliminary report).

Velopharyngeal closure in various tasks was examined in 59 cleft palate patients with persistent velopharyngeal incompetence using nasopharyngeal fibrescopic (NPF) examination. The degree of velopharyngeal closure was analyzed according to the categories reported previously by Yamaoka (1973) and Matsuya et al. (1979). The NPF self-training system was developed and applied to those patients so as to investigate a longitudinal effect of the NPF in velopharyngeal closure mechanism. The training was performed every two weeks for nearly one year. The results indicated that the patient who showed complete velopharyngeal closure during blowing and/or several productions of speech samples could attain a much better improvement in all speech samples after one year of self-training. On the other hand, the patients who did not show complete velopharyngeal closure during all tasks, failed to improve the velopharyngeal closing mechanism. The ability to close the velopharynx during swallowing was seen in all patients examined. However, it appeared to have nothing to do with the prognosis of velopharyngeal closure. The data suggested that the NPF self-training system provided a strong neuro-muscular signal for velopharyngeal movement. Besides, it was considered that the NPF was a useful tool for activation of velopharyngeal activity by way of visual feed-back control.

Adolescent↗
PubMed1981

Velopharyngeal closure in patients with facial paralysis: the fiberscopic examination of the velopharyngeal movements.

The present study was intended to clarify the role of the facial nerve in velopharyngeal movement and to determine the pathway of the facial nerve innervating the muscles related to velopharyngeal closure in man. Velopharyngeal function in 100 patients with idiopathic peripheral facial paralysis was analyzed using the nasopharyngeal fiberscope (NPF) and neuro-otological examinations. Lack of velopharyngeal closure was observed during Japanese isolated vowels and vowels in consonant-vowel (CV) syllables in patients with facial paralysis. Velopharyngeal opening was found in 85.7% of the subjects with suprastapedial paralysis and in 22.2% of those with infrastapedial paralysis. The facial nerve seemed to affect velopharyngeal movement, at least during vowel productions, through the greater petrosal nerve. Velopharyngeal closure in swallowing and blowing was always demonstrated. Hypernasality during connected speech was not heard in these patients.

Adolescent↗
PubMed1979

A fiberscopic study of velopharyngeal closure in patients with operated cleft palates.

We studied the differences in how velopharyngeal closure is learned and obtained by operated cleft palate patients during various activities. Sixty-eight operated cleft palate patients, who had complete closure during swallowing, were examined with the nasopharyngeal fiberscope to determine the extent of velopharyngeal closure while they were producing pressure consonants or vowels, and during blowing. We concluded that the complete closure when producing vowels was the most difficult to obtain, and closure when producing pressure consonants was a little more difficult than that during blowing.

Adolescent↗
PubMed1978

The course of facial nerve innervation for the levator veli palatini muscle.

The present study was designed to determine the motor nerve pathway of the facial nerve to the levator veli palatini muscle. The experiments were carried out on 10 anesthetized rhesus monkeys. Recorded and analyzed were evoked EMG responses of the levator veli palatini and the orbicularis oris muscles by electrical stimulation to both the facial nerve and its branch within the cranium. Muscle action potentials (M-waves) from the two muscles could be recognized on stimulating the facial nerve at the petrosal area of the temporal bone. On stimulating the greater petrosal nerve, M-waves from the levator muscle could be elicited. By cutting off the greater petrosal nerve at the middle cranial fossa, M-waves from the levator muscle completely disappeared on stimulating the facial nerve at the petrosal area. Results indicated that the course of the facial nerve for the levator veli palatini muscle is through the greater petrosal nerve.

Action Potentials↗
PubMed1976

The motor nerve supply of the velopharyngeal muscles.

The present study attempted to clarify the motor nerve supply of the velopharyngeal muscles. Experiments were carried out on 20 anesthetized rhesus monkeys. Evoked EMG responses of the levator veli palatini, uvula, and superior constrictor pharyngeus muscles, which seem to contribute to velopharyngeal closure, were analyzed by stimulating the cranial nerves within the skull. Results were as follows: 1. Muscle action potentials (M-waves) from the selected muscles could be recognized on stimulating the facial, glossopharyngeal, and vagus nerves at the petrosal area of the temporal bone but were not noted upon accessory nerve stimulation. 2. At maximal stimulation, the vagus gave a greater increase in muscle amplitude than the other nerves studied. This was followed by the glossopharyngeal with the facial nerve producing the least increase in amplitude. 3. Also at maximal stimulation, latencies in the response of the levator veli palatini and uvula muscles were reduced to the greatest degree by stimulation of the vagus, to a lesser extent for the glossopharyngeal, and least for the facial nerve. 4. On stimulating the facial nerve below the stylomastoid foramen, M-waves could not be recognized. From the present study, it was concluded that the levator veli palatini, uvula, and superior constrictor pharyngeus muscles are double innervated by the facial nerve and branches of the pharyngeal plexus derived from the glossopharyngeal and vagus nerves and that the facial nerve plays an important role as one of the motor nerves in movements responsible for velopharyngeal closure.

Accessory Nerve↗
PubMed1976

Roles of the facial, glossopharyngeal and vagus nerves in velopharyngeal movement.

The present study was designed to clarify the role of the motor nerves in velopharyngeal movements. Experiments were carried out on 15 anesthetized rhesus monkeys on the assumption that their velopharyngeal structures are similar to those of human beings. The pattern and degree of velopharyngeal movements with stimulation to the facial, glossopharyngeal, and vagus nerves in the petrosal area were analyzed by means of fiberscopic observations. The results obtained were as follows: 1. Velopharyngeal movements were most active with stimulation to the vagus, then the glossopharyngeal, and, finally, the facial nerve. 2. Complete closure by unilateral stimulation was elicited only by the vagus nerve and not the facial or glossopharyngeal nerves. 3. The pattern of velopharyngeal movements observed when stimulating the facial nerve was quite different from those seen when the glossopharyngeal or the vagus nerve was stimulated. That is, movements in a plane at the upper part of the nasopharynx were observed on stimulating the facial nerve while upward movements from all of the velopharyngeal structures were seen when the glossopharyngeal or vagus nerve was stimulated. 4. Combined stimulation to the nerves sometimes resulted in additive effects on velopharyngeal movements, but these could be recognized in only a few cases. This study reveals that the motor nerves innervating the velopharyngeal muscles play different roles in velopharyngeal movements.

Animals↗
PubMed1975

Fiberscopic methods for assessment of velopharyngeal closure during various activities.

Fiberscope NPF, developed to observe velopharyngeal movements easily, enables a direct visualization of the soft palate, lateral and posterior pharyngeal walls under the physiological conditions. It is most useful for the diagnosis of velopharyngeal inadequacy. It is very important that a patient himself can observe velopharyngeal movements through the eyepiece of the fiberscope in order to do self exercise.

Endoscopes↗