Publications by authors named "Yongjin Ahn"

Article Synopsis
  • * Twenty-four rats were divided into four groups to compare the effects of corticosteroid injections versus no interventions after initial immobilization.
  • * Results showed that rats receiving corticosteroid injections (Groups A and B) had better shoulder mobility and less fibrosis/inflammation compared to those that did not receive the injections (Groups C and D), indicating the potential benefits of corticosteroids in treating frozen shoulder.
View Article and Find Full Text PDF

Background: Intra-articular corticosteroid or hyaluronic acid (HA) is commonly prescribed for frozen shoulder. However, few studies have investigated histological and molecular changes after injection.

Purpose: To compare the effectiveness of intra-articular injections of triamcinolone and HA in a frozen shoulder rat model and verify a greater effect of triamcinolone in passive shoulder abduction compared with HA.

View Article and Find Full Text PDF

Cerebral palsy is a neurologic disorder caused by lesions on an immature brain, often resulting in spasticity and gait abnormality. This study aimed to compare the muscle activation patterns of real level and stair walking with those of simulated walking using an end-effector-type robot in children with spastic cerebral palsy. The electromyographic activities of the vastus lateralis, biceps femoris, tibialis anterior and medial gastrocnemius of nine children with spastic bilateral cerebral palsy were measured during gait using a wireless surface EMG device.

View Article and Find Full Text PDF

Hydrogen sulfide (HS) is known to participate in bacteria-induced inflammatory response in periodontal diseases. Therefore, it is necessary to quantify HS produced by oral bacteria for diagnosis and treatment of oral diseases including halitosis and periodontal disease. In this study, we introduce a paper-based colorimetric assay for detecting bacterial HS utilizing silver/Nafion/polyvinylpyrrolidone membrane and a 96-well microplate.

View Article and Find Full Text PDF

Walking on sloped surfaces requires additional effort; how individuals with spastic hemiplegic cerebral palsy (CP) manage their gait on slopes remains unknown. Herein, we analyzed the difference in gait adaptation between the affected and unaffected legs according to changes in the incline by measuring spatiotemporal and kinematic data in children with spastic hemiplegic CP. Seventeen children underwent instrumented three-dimensional gait analysis on a dynamic pitch treadmill at an incline of +10° to -10° (intervals of 5°).

View Article and Find Full Text PDF

This paper aims to investigate the role of neighborhood tree and greenspace on asthma morbidity, especially asthma emergency room visits. We employed advanced spatial data which allow for precisely capturing both the quantity and the features of tree and greenspace within a neighborhood environment. The results from the spatial regression models in Los Angeles County revealed that the features of trees and greenspace, such as the configuration of the tree canopy, the level of tree clustering, and private neighborhood greenspaces contribute to decreasing asthma morbidity, in addition to the quantity of tree and greenspace acreages.

View Article and Find Full Text PDF