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Biomedical subjects

Y Tateno

Publications and source records attributed to Y Tateno.

At least 145 records · Page 8Linked to original sources
PubMed1985

[Nuclear magnetic resonance imaging in a case of facial myokymia with multiple sclerosis].

A 59-year-old female of facial myokymia with multiple sclerosis was reported. In this case, facial myokymia appeared at the same time as the first attack of multiple sclerosis, in association with paroxysmal pain and desesthesia of the neck, painful tonic seizures of the right upper and lower extremities and cervical transverse myelopathy. The facial myokymia consisted of grossly visible, continuous, fine and worm-like movement, which often began in the area of the left orbicularis oculi and spread to the other facial muscles on one side. Electromyographic studies revealed grouping of motor units and continuous spontaneous rhythmic discharges in the left orbicularis oris suggesting facial myokymia, but there were no abnormalities on voluntary contraction. Sometimes doublet or multiplet patterns occurred while at other times the bursts were of single motor potential. The respective frequencies were 3-4/sec and 40-50/sec. There was no evidence of fibrillation. The facial myokymia disappeared after 4-8 weeks of administration of prednisolone and did not recur. In the remission stage after disappearance of the facial myokymia, nuclear magnetic resonance (NMR) imaging by the inversion recovery method demonstrated low intensity demyelinated plaque in the left lateral tegmentum of the inferior pons, which was responsible for the facial myokymia, but X-ray computed tomography revealed no pathological findings. The demyelinated plaque demonstrated by NMR imaging seemed to be located in the infranuclear area of the facial nerve nucleus and to involve the intramedurally root.(ABSTRACT TRUNCATED AT 250 WORDS)

Action Potentials↗
PubMed1984

Positron CT imaging using a high resolution PCT device (Positologica-I), 11CO, 13NH3, and 18FDG in clinical evaluation of cerebrovascular diseases.

Positron computed tomography (PCT) was performed in 3 normal volunteers and 21 patients with cerebrovascular diseases using a high resolution PCT device 'Positologica-I' and three tracers 11CO, 13NH3, and 18FDG. Relatively early lesions showed various accumulation patterns, and metabolism and perfusion mismatches were clearly shown by this measurement. One type of mismatch is luxury perfusion which had a slight increase of blood volume. Another type of uncoupling is misery perfusion. Remote effects of ischemic lesions also appeared on PCT with 18FDG and 13NH3. From our clinical results, the PCT method with a high resolution device and radiopharmaceuticals such as 11CO, 13NH3, and 18FDG is very useful in the assessment of cerebrovascular diseases and in defining circulatory dysfunction in man.

Adolescent↗
PubMed1984

[Prospective study to assess the clinical efficacy of bone scintigraphy--methodology and some preliminary results].

The purpose of this study is to evaluate prospectively the value of radionuclide bone scans at the preoperative assessment of carcinomas of the breast and prostate carcinomas. Ten hospitals which are in or near Tokyo are participating in this study. For each patient under study, three kinds of sheet are filled by doctors. The first sheet named "preexamination diagnosis data sheet" is recorded before preoperative bone scan by attending physicians mainly. The second sheet named "postexamination diagnosis data sheet" is recorded after preoperative bone scan by nuclear medicine physicians who performed bone scintigraphy. The third sheet named "final diagnosis data sheet" is recorded after about a year of follow up period by attending physicians or nuclear medicine physicians. These data have been stored in a electric computer. Some preliminary analysis has been made by comparing the confidence level of diagnosis for bone metastasis before and after bone scintigraphy. In this report, methodology of the analysis and some results are described.

Adult↗