Publications by authors named "Kazuya Yamazaki"

Article Synopsis
  • - The study explored how foam rolling affects the flexibility of the gastrocnemius muscle, muscle-tendon unit, and Achilles tendon, focusing on ankle dorsiflexion in a group of college-aged students.
  • - After a 3-minute foam rolling session on the right leg, researchers noted a significant increase in ankle dorsiflexion range of motion, specifically with measured resistance values.
  • - While ankle joint flexibility improved, changes in gastrocnemius muscle extensibility were observed, but they weren’t statistically significant, indicating foam rolling may influence both joint motion and muscle structure.
View Article and Find Full Text PDF

Introduction: Maintaining flexibility, often defined as range of motion (ROM), is important. Recently, self-massage using a foam roller (FR) has been used in clinical and/or sports settings to effectively and immediately improve ROM. Many studies have found significant increases in ROM following the FR intervention; however, the mechanism of the effect is unclear.

View Article and Find Full Text PDF

A 16-year-old boy suffered a subarachnoid hemorrhage and underwent open head surgery. He was subsequently diagnosed with coarctation of the aorta and referred to our hospital. The coarctation was at the distal transverse arch, just at the site of branching of the subclavian artery.

View Article and Find Full Text PDF

The charging effect due to electron irradiation in an electron microscope has been studied so far with incident electrons. Here we report on a new specimen holder to control the charging effect by using electrons emitted from an irradiation port in the holder while maintaining a constant intensity of the incident electron beam. Details of the charging effect, such as electric field variation, are expected to be investigated by electron holography.

View Article and Find Full Text PDF

The double-probe piezodriving specimen holder that was recently developed by some of the present authors is modified to introduce a laser irradiation port in one of its two arms. As a result, the new specimen holder consists of a piezodriving probe and a laser irradiation port, both of which can be three-dimensionally controlled by using piezoelectric elements and micrometers. While the piezodriving probe interacts with the specimen set in the holder in several ways, the laser beam causes photo-induced phenomena to occur.

View Article and Find Full Text PDF

Background/aims: The aims of this study were to assess the prognosis and histopathological factors of poorly differentiated colorectal adenocarcinoma, and the clinical relevance of the proposed histopathological sub classifications.

Methodology: Fifty eight patients with poorly differentiated adenocarcinoma were enrolled in this study. According to the lymphatic canal spread in tumor tissue, they were classified into lymphangitic type (tumor spread beyond the intra mucosal tumor space through the lymphatic canal widely) and non-lymphangitic type (tumor spread within that space).

View Article and Find Full Text PDF