Observation of Cochlear Sensory Hairs in the Neonatal Hamster

The authors performed the observation of the cochlear sensory hairs in the neonatal hamster by the scanning electron microscope from the first day to the sixteenth day after birth, by surface preparation technique under the magnifying glass. The results were as follows : The cochlear sensory hairs that were observed as the microvilli in the initial stage grew up to the stereocilia of adult hamster, showing the regular pattern of the development of the cochlear sensory hairs. The time of the completion of those development was judged to be eleven, thirteen and sixteen days after birth, in each basal, middle and apical turn of the basilar membrane

Clinical and Statistical Studies on Laryngeal Carcinoma in Kawasaki Medical School Hospital

The authors reported clinical and statistical studies on the forty-two cases with laryngeal carcinoma that were admitted to Kawasaki Medical School Hospital between June 1975 and September 1981, that is, these cases were reported from viewpoints of age, rate of existence, chief complaints, smoking, drinking, treatments, prognoses, double carcinoma, cause of death, primary parts, total laryngectomy etc

A Case of Lipoma in the Deep Part of Neck

It is comparatively rare that lipoma is found in the deep part of neck, though lipoma is often found in parts of back, neck, breast, etc. And so the authors reported a case of lipoma in 71-year-old woman that was made the diagnosis of lipoma in the deep part of neck, from the clinical symptoms and CT examination, and was confirmed histologically after the enucleation under general anesthesia

Bone Marrow Cell Transplantation into the Heart is Not a Crucial Factor of Ventricular Fibrillation in a Rat Doxorubicin-Induced Cardiomyopathy Model

To verify the susceptibility of ventricle to arrhythmia after bone marrow mononuclear cell transplantation (BMMNCT), we measured ventricular fibrillation threshold (VFT) and monophasic action potential duration (MAYD90). Lewis rats with doxorubicin-induced cardiomyopathy were divided into 2 groups: transplantation group (D-TX: BMMNC (1 × 106) given transplants into the apex at 4 weeks after doxorubicin administration) and nontransplantation group (D-N). Age-matched normal group (N-N) was prepared. At 4 weeks after BMMNCT, the following electrophysiologic tests were performed. Experiment 1 (VFT): Two stainless wires were placed at the apex and a single train of 10 square wave stimuli was delivered across T wave. The lowest current developing ventricular fibrillation was determined as VFT. Experiment 2 (MAPD90): The catheter was inserted into the left ventricle and pressed against the endocardium near the apex under regular cycle lengths. Experiment 1: VFT of D-TX and D-N were significantly lower than that of N-N (p D-TX>N-N at every cycle lengths. There was a significant difference between D-N and N-N (p < 0.01), and D-TX and N-N (p < 0.05). In this model, BMMNCT did not increase susceptibility to arrthythmia