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Kim NE, Kim MJ, Park BJ, Kwon JW, Lee JM, Park JH, Song YJ. A DNA vaccine against GII.4 human norovirus VP1 induces blocking antibody production and T cell responses. Vaccine 2024; 42:1392-1400. [PMID: 38320930 DOI: 10.1016/j.vaccine.2024.01.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/15/2024] [Accepted: 01/25/2024] [Indexed: 02/08/2024]
Abstract
Human noroviruses (HuNoVs) are highly contagious and a leading cause of epidemics of acute gastroenteritis worldwide. Among the various HuNoV genotypes, GII.4 is the most prevalent cause of outbreaks. However, no vaccines have been approved for HuNoVs to date. DNA vaccines are proposed to serve as an ideal platform against HuNoV since they can be easily produced and customized to express target proteins. In this study, we constructed a CMV/R vector expressing a major structural protein, VP1, of GII.4 HuNoV (CMV/R-GII.4 HuNoV VP1). Transfection of CMV/R-GII.4 HuNoV VP1 into human embryonic kidney 293T (HEK293T) cells resulted in successful expression of VP1 proteins in vitro. Intramuscular or intradermal immunization of mice with the CMV/R-GII.4 HuNoV VP1 construct elicited the production of blocking antibodies and activation of T cell responses against GII.4 HuNoV VP1. Our collective data support the utility of CMV/R-GII.4 HuNoV VP1 as a promising DNA vaccine candidate against GII.4 HuNoV.
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Affiliation(s)
- Na-Eun Kim
- Department of Life Science, Gachon University, Seongnam-Si, South Korea
| | - Mun-Jin Kim
- Department of BioNano Technology, Gachon University, Seongnam-Si, South Korea
| | - Bum Ju Park
- Department of Life Science, Gachon University, Seongnam-Si, South Korea
| | - Jung Won Kwon
- Department of Life Science, Gachon University, Seongnam-Si, South Korea
| | - Jae Myun Lee
- Department of Microbiology and Immunology, Institute for Immunology and Immunological Diseases, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, South Korea
| | - Jung-Hwan Park
- Department of BioNano Technology, Gachon University, Seongnam-Si, South Korea
| | - Yoon-Jae Song
- Department of Life Science, Gachon University, Seongnam-Si, South Korea.
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2
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Kim JT, Chen J, Zhou Y, Son MJ, Jeon DH, Kwon JW, Lee GY, Lee HJ. Cycloastragenol inhibits adipogenesis and fat accumulation in vitro and in vivo through activating Hedgehog signaling. Food Sci Biotechnol 2024; 33:711-720. [PMID: 38274180 PMCID: PMC10805729 DOI: 10.1007/s10068-023-01403-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/20/2023] [Accepted: 07/24/2023] [Indexed: 01/27/2024] Open
Abstract
In this study, we investigated the effect of cycloastragenol (CAG), a triterpenoid isolated from Astragalus membranaceus roots, on regulating the adipogenesis and fat accumulation in vitro and in vivo. During the adipogenesis of 3T3-L1 cells, CAG inhibited lipid accumulation and the expression of key adipogenic factors, proliferator-activated receptor γ (PPARγ) and CCAAT enhancer binding protein α (C/EBPα) and increased the expression of Gli1, a key mediator in Hedgehog (Hh) signaling. In HFD-induced animal experiment, CAG significantly reduced body weight gain without affecting brown fat weight. In addition, CAG regulated the expression of PPARγ, C/EBPα, and Gli1 in visceral white adipose tissue (vWAT). We also confirmed the inhibitory effect of CAG on specifically targeting white adipose tissue (WAT) formation in stromal vascular fraction (SVF) cell differentiation. Taken together, these results suggest that CAG may be a potent phytochemical preventing adipogenesis and obesity via Hh signaling. Supplementary Information The online version contains supplementary material available at 10.1007/s10068-023-01403-0.
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Affiliation(s)
- Jin Tae Kim
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 456-756 South Korea
| | - Jing Chen
- Institute for Advanced and Applied Chemical Synthesis, Jinan University, Guangzhou, 510632 China
| | - Yimeng Zhou
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 456-756 South Korea
| | - Moon Jeong Son
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 456-756 South Korea
| | - Dong Hyeon Jeon
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 456-756 South Korea
| | - Jung Won Kwon
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 456-756 South Korea
| | - Ga Yeon Lee
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 456-756 South Korea
| | - Hong Jin Lee
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 456-756 South Korea
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Yun SH, Jang TS, Kwon JW. Cortical activity and spatiotemporal parameters during gait termination and walking: A preliminary study. Behav Brain Res 2024; 456:114701. [PMID: 37813283 DOI: 10.1016/j.bbr.2023.114701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 10/06/2023] [Accepted: 10/06/2023] [Indexed: 10/11/2023]
Abstract
Gait termination requires an interaction between the biomechanical and neuromuscular systems to arrest forward momentum. Currently, the biomechanical characteristics of gait termination have been demonstrated; however, the neural mechanism of gait termination remains unclear. This study aimed to investigate cortical activity during gait termination using functional near-infrared spectroscopy (fNIRS). Thirteen healthy younger adults (mean age:24.0 ± 1.7) participated in this study. All participants performed three experimental sessions: planned gait termination (PGT), unplanned gait termination (UGT), and walking. Each experimental session comprised a block paradigm design (three cycles; 20 s resting, 45 s task). Cortical activity in the dorsolateral prefrontal cortex (DLPFC), supplementary motor area (SMA), and primary motor cortex (M1) and spatiotemporal parameters were measured. We compared the cortical activities and spatiotemporal parameters among PGT, UGT, and walking sessions. In addition, we performed Pearson correlations between hemodynamic responses and spatiotemporal parameters. The PGT was activated in the right DLPFC, whereas the UGT and walking were activated in the left SMA (p < 0.05). Comparing cortical activation between sessions, both the PGT and UGT showed significantly higher activation in the right DLPFC than during walking (p < 0.05). There were no significant differences in cortical activity between PGT and UGT (p > 0.05). In addition, the gait termination time revealed moderate positive correlation with hemodynamic responses in the right DLPFC (p < 0.05). Our results indicate that the right DLPFC is associated with gait termination, regardless of gait termination type. Our findings provide the potential implication that the hemodynamic response in the right DLPFC would be a biomarker to evaluate the ability of gait termination.
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Affiliation(s)
- Seong Ho Yun
- Department of Public Health Sciences, Graduate School, Dankook University, Cheonan, South Korea
| | - Tae Su Jang
- Department of Health Administration, College of Health and Welfare Sciences, Dankook University, Cheonan, South Korea
| | - Jung Won Kwon
- Department of Physical Therapy, College of Health and Welfare Sciences, Dankook University, Cheonan, South Korea.
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Zhou Y, Moon JH, Kim JT, Qiu S, Lee SB, Park HJ, Son MJ, Lee GY, Kwon JW, Park SH, Auh JH, Lee HJ. Curcumol metabolized by rat liver S9 fraction and orally administered in mouse suppressed the proliferation of colon cancer in vitro and in vivo. Food Sci Biotechnol 2024; 33:171-180. [PMID: 38186621 PMCID: PMC10767046 DOI: 10.1007/s10068-023-01321-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 04/15/2023] [Accepted: 04/20/2023] [Indexed: 01/09/2024] Open
Abstract
Following 3R (reduction, refinement, and replacement) principles, we employed the rat liver S9 fraction to mimic liver metabolism of curcumol having high in vitro IC50 on cancer cells. In HCT116 and HT29 colon cancer cells, the metabolites of curcumol by S9 fraction exerted more enhanced activity in inducing cell cycle arrest and apoptosis via regulating the expression of cyclin D1, CDK1, p21, PARP and Bcl-2 than curcumol. In addition, oral administration of curcumol at 4 mg/kg BW significantly suppressed the development of colon tumor induced by azoxymethane/dextran sulfate sodium, and induced cell cycle arrest and apoptosis in tumor tissues. In mass analysis, curcumenol and curzerene were identified as the metabolites of curcumol by S9 fraction metabolism. Taken together, curcumol metabolites showed the enhanced suppressive effect on colon cancer, suggesting that S9 fraction can be considered as simple, fast, and bio-mimicking platform for the screening of chemical libraries on different chronic diseases.
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Affiliation(s)
- Yimeng Zhou
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546 South Korea
| | - Ji Hyun Moon
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546 South Korea
| | - Jin Tae Kim
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546 South Korea
| | - Shuai Qiu
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546 South Korea
| | - Seung Beom Lee
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546 South Korea
| | - Ho Jin Park
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546 South Korea
| | - Moon Jeong Son
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546 South Korea
| | - Ga Yeon Lee
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546 South Korea
| | - Jung Won Kwon
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546 South Korea
| | - So-Hyeon Park
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546 South Korea
| | - Joong-Hyuck Auh
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546 South Korea
| | - Hong Jin Lee
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546 South Korea
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Lee YM, Koo DK, Kwon JW. The efficacy of sling exercise combined with extracorporeal shock wave on office workers with chronic neck pain. Medicine (Baltimore) 2023; 102:e33940. [PMID: 37335668 DOI: 10.1097/md.0000000000033940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/21/2023] Open
Abstract
This study aimed to investigate the effect of extracorporeal shockwave therapy on the anterior surface line of the fascia meridian, including the oblique muscle, combined with sling exercise, on the stability of the spine in the neck disability index (NDI), neck joint range of motion (ROM), craniovertebral angle, neck alignment, and posture control. A total of 20 office workers with chronic neck pain were randomly assigned to an experimental group that combined extracorporeal shock wave therapy and sling exercise (n = 10) and a control group (CG) consisting of sling exercise (n = 10) performed twice weekly for 4 weeks. All subjects were evaluated using the NDI, ROM, neck alignment, and spine stability tests. Following the intervention, there were significant differences in the For example, NDI, craniovertebral angle, Cobb's angle, Centaur data, and ROM. Except for Cobb's angle and Centaur data (-90 degrees), all variables showed significant differences in the CG. Comparing changes before and after the intervention, The For example, showed significantly more significant changes in all variables than the CG. The combination of extracorporeal shockwave therapy and sling exercises improved NDI, ROM, and neck and spine alignment in office workers with chronic neck pain more effectively than the sling exercise alone. This study could be recommended as a new approach to enable individuals with chronic neck pain to perform better.
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Affiliation(s)
- Young Min Lee
- Department of Public Health Sciences, Graduate School, Dankook University, Cheonan, Korea
| | - Dong Kyun Koo
- Department of Public Health Sciences, Graduate School, Dankook University, Cheonan, Korea
| | - Jung Won Kwon
- Department of Physical Therapy, College of Health and Welfare Sciences, Dankook University, Cheonan, Korea
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Son SM, Yun SH, Kwon JW. Motor Imagery Combined With Physical Training Improves Response Inhibition in the Stop Signal Task. Front Psychol 2022; 13:905579. [PMID: 35795413 PMCID: PMC9251501 DOI: 10.3389/fpsyg.2022.905579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 05/30/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundMotor imagery training has a similar effect to that of physical training on motor performance. The objective of this study was to investigate the short-term effectiveness of motor imagery training on response inhibition using the stop signal task (SST).MethodsParticipants were divided into a physical training group (PT, n = 17), a motor imagery training group (MIT, n = 17), and a motor imagery combined with physical training group (MIPT, n = 17). All participants performed 10 SST training sessions over 5 days. Both stop signal reaction time (SSRT) and non-signal reaction time (NSRT) were measured before and after SST training.ResultsThere were significant interaction (time × group) and time effects, although the group effect was not statistically significant. Bonferroni post hoc analysis showed that MIPT group revealed a significantly greater change in SSRT than PT and MIT groups, while there was no significant difference between PT and MIT groups. SSRT significantly decreased after training in all groups. In NSRT, there was a significant effect of time, but there was no significant interaction effect (time × group) or group effect.ConclusionResponse inhibition could be enhanced via training, and it was most effective when motor imagery and physical training were combined. We demonstrate that motor imagery training significantly improves response inhibition and should be accompanied by physical training when performing SST.
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Affiliation(s)
- Sung Min Son
- Department of Physical Therapy, College of Health Science, Cheongju University, Cheongju, South Korea
| | - Seong Ho Yun
- Department of Public Health Sciences, Graduate School, Dankook University, Cheonan, South Korea
| | - Jung Won Kwon
- Department of Physical Therapy, College of Health and Welfare Sciences, Cheonan, South Korea
- *Correspondence: Jung Won Kwon,
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Kwon JW, Quan H, Song J, Chung H, Jung D, Hong JJ, Na YR, Seok SH. Liposomal Dexamethasone Reduces A/H1N1 Influenza-Associated Morbidity in Mice. Front Microbiol 2022; 13:845795. [PMID: 35495698 PMCID: PMC9048800 DOI: 10.3389/fmicb.2022.845795] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 02/23/2022] [Indexed: 01/20/2023] Open
Abstract
Re-emerging viral threats have continued to challenge the medical and public health systems. It has become clear that a significant number of severe viral infection cases are due to an overreaction of the immune system, which leads to hyperinflammation. In this study, we aimed to demonstrate the therapeutic efficacy of the dexamethasone nanomedicine in controlling the symptoms of influenza virus infection. We found that the A/Wisconsin/WSLH34939/2009 (H1N1) infection induced severe pneumonia in mice with a death rate of 80%, accompanied by significant epithelial cell damage, infiltration of immune cells, and accumulation of pro-inflammatory cytokines in the airway space. Moreover, the intranasal delivery of liposomal dexamethasone during disease progression reduced the death rate by 20%. It also significantly reduced the protein level of tumor necrosis factor-alpha (TNFα), interleukin-1β (IL-1β), IL-6, and the C-X-C motif chemokine ligand 2 (CXCL2) as well as the number of infiltrated immune cells in the bronchoalveolar lavage fluids as compared to the control and free dexamethasone. The liposomal dexamethasone was mainly distributed into the monocyte/macrophages as a major cell population for inducing the cytokine storm in the lungs. Taken together, the intranasal delivery of liposomal dexamethasone may serve as a novel promising therapeutic strategy for the treatment of influenza A-induced pneumonia.
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Affiliation(s)
- Jung Won Kwon
- Macrophage Lab, Department of Microbiology and Immunology, Institute of Endemic Disease, Seoul National University College of Medicine, Seoul, South Korea
| | - Hailian Quan
- Macrophage Lab, Department of Microbiology and Immunology, Institute of Endemic Disease, Seoul National University College of Medicine, Seoul, South Korea
| | - Juha Song
- Macrophage Lab, Department of Microbiology and Immunology, Institute of Endemic Disease, Seoul National University College of Medicine, Seoul, South Korea
| | - Hyewon Chung
- Macrophage Lab, Department of Microbiology and Immunology, Institute of Endemic Disease, Seoul National University College of Medicine, Seoul, South Korea
| | - Daun Jung
- Macrophage Lab, Department of Microbiology and Immunology, Institute of Endemic Disease, Seoul National University College of Medicine, Seoul, South Korea
| | - Jung Joo Hong
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju-si, South Korea.,KRIBB School of Bioscience, Korea University of Science & Technology (UST), Daejeon, Korea
| | - Yi Rang Na
- Transdisciplinary Department of Medicine and Advanced Technology, Seoul National University Hospital, Seoul, South Korea
| | - Seung Hyeok Seok
- Macrophage Lab, Department of Microbiology and Immunology, Institute of Endemic Disease, Seoul National University College of Medicine, Seoul, South Korea.,Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, South Korea
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Gam BU, Cho IH, Yeo SS, Kwon JW, Jang SH, Oh S. Comparative study of vestibular projection pathway connectivity in cerebellar injury patients and healthy adults. BMC Neurosci 2022; 23:17. [PMID: 35317746 PMCID: PMC8939126 DOI: 10.1186/s12868-022-00702-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 03/07/2022] [Indexed: 11/25/2022] Open
Abstract
Objective Cerebellar injury can not only cause gait and postural instability, nystagmus, and vertigo but also affect the vestibular system. However, changes in connectivity regarding the vestibular projection pathway after cerebellar injury have not yet been reported. Therefore, in the current study, we investigated differences in the connectivity of the vestibular projection pathway after cerebellar injury using diffusion tensor imaging (DTI) tractography. Methods We recruited four stroke patients with cerebellar injury. Neural connectivity in the vestibular nucleus (VN) of the pons and medulla oblongata in patients with cerebellar injury was measured using DTI. Connectivity was defined as the incidence of connection between the VN on the pons and medulla oblongata and target brain regions such as the cerebellum, thalamus, parieto-insular vestibular cortex (PIVC), and parietal lobe. Results At thresholds of 10 and 30, there was lower connectivity in the ipsilateral hemisphere between the VN at the medullar level and thalamus in the patients than in healthy adults. At a threshold of 1 and 10, the patient group showed lower VN connectivity with the PIVC than healthy adults. At a threshold of 1, VN connectivity with the parietal lobe in the contralateral hemisphere was lower in the patients than in healthy adults. Additionally, at a threshold of 30, VN connectivity at the pons level with the cerebellum was lower in healthy adults than in the patients. Conclusion Cerebellar injury seems to be associated with decreased vestibular projection pathway connectivity, especially in the ipsilateral thalamus, PIVC, and contralateral parietal lobe.
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Affiliation(s)
- Byeong Uk Gam
- Department of Health, Graduate School, Dankook University, 119, Dandae-ro, Dongnam-gu, Cheonan, Chungnam, 31116, Republic of Korea
| | - In Hee Cho
- Department of Health, Graduate School, Dankook University, 119, Dandae-ro, Dongnam-gu, Cheonan, Chungnam, 31116, Republic of Korea
| | - Sang Seok Yeo
- Department of Physical Therapy, College of Health Sciences, Dankook University, 119, Dandae‑ro, Dongnam-gu, Cheonan, Chungnam, 31116, Republic of Korea
| | - Jung Won Kwon
- Department of Physical Therapy, College of Health Sciences, Dankook University, 119, Dandae‑ro, Dongnam-gu, Cheonan, Chungnam, 31116, Republic of Korea
| | - Sung Ho Jang
- Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, 170, Hyeonchung-ro, Nam-gu, Daegu, 42415, Republic of Korea
| | - Seunghue Oh
- Department of Physical Therapy, Uiduk University, 261, Donghaedae-ro, Gangdong-myeon, Gyeongju, Gyeongsangbuk-do, 38004, Republic of Korea.
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Yun SH, Cho MJ, Kwon JW. Comparison of forward versus backward walking on spatiotemporal and kinematic parameters on sand: A preliminary study. J Biomech 2021; 130:110876. [PMID: 34871892 DOI: 10.1016/j.jbiomech.2021.110876] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 11/09/2021] [Accepted: 11/22/2021] [Indexed: 01/17/2023]
Abstract
The purpose of this study was to investigate the spatiotemporal and kinematic parameters of backward walking (BW) and forward walking (FW) on sand. Randomly selected subjects (n = 28) were categorized into a sand group (SG, n = 14) and an overground group (OG, n = 14). SG was directed to perform both FW and BW on sand, while OG performed the same on the overground. Spatiotemporal and kinematic parameters were measured using the LegSys + device. The comparative findings of both the groups showed that the spatiotemporal parameters of SG varied significantly from those of OG in both FW and BW conditions (p < 0.05). The kinematic parameters varied significantly between the two groups only in the FW condition (p < 0.05). When compared within each group, spatiotemporal and kinematic parameters in the BW condition were significantly different from those in the FW condition. However, the percentages of stance, swing, and double support were not significantly different between FW and BW conditions (p > 0.05). This study suggests that sand walking is associated with a different gait pattern than overground walking, as evident from the analysis of the results of spatiotemporal and kinematic parameters in both FW and BW conditions. Therefore, sand walking can be used as a new approach to gait and balance training in clinical practice.
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Affiliation(s)
- Seong Ho Yun
- Department of Physical Therapy, College of Health Sciences, Dankook University, Republic of Korea
| | - Min Jye Cho
- Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, Republic of Korea
| | - Jung Won Kwon
- Department of Physical Therapy, College of Health Sciences, Dankook University, Republic of Korea.
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Abstract
OBJECTIVE Subjective visual vertical (SVV) deviation can indicate impairments of motion perception and spatial orientation in individuals with vestibular disorders. This study investigated the influence of SVV on tandem gait ability by assessing differences between temporal, spatial, and kinematic characteristics in young adults. METHODS We recruited sixteen young adults with increased SVV and 17 age-matched control subjects. All subjects recruited for this study were with no history of neurological or musculoskeletal diseases. Knee and hip-joint kinematic data, spatio-temporal parameters, and gait variability were measured during tandem gait. RESULTS Stride time variability and stride velocity variability were significantly greater in the experimental group than the control group (p < 0.05). In addition, a significant correlation was observed between stride time variability and SVV results (r = 0.345, p < 0.05). However, hip and knee joint angles were non-significantly different in the experimental and control groups (p > 0.05) and spatio-temporal parameters were similar between the two groups (p > 0.05). CONCLUSION Stride time variability and stride velocity variability during tandem gait were significantly different in the experimental and control groups. We presume that increased SVV deviation is related to greater gait variability during tandem gait.
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Affiliation(s)
- In Hee Cho
- Department of Clinical Science, Graduate School of Health and Welfare, Dankook University, Republic of Korea
| | - Jung Won Kwon
- Department of Physical Therapy, College of Health Sciences, Dankook University, Republic of Korea
| | - Sang Seok Yeo
- Department of Physical Therapy, College of Health Sciences, Dankook University, Republic of Korea
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Kwon JW, Park SY, Baek KH, Youk K, Oh S. Breathing Exercise Called the Maximal Abdominal Contraction Maneuver. ACTA ACUST UNITED AC 2021; 57:medicina57020129. [PMID: 33540623 PMCID: PMC7913092 DOI: 10.3390/medicina57020129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 01/28/2021] [Accepted: 01/29/2021] [Indexed: 11/16/2022]
Abstract
Background and objectives: The maximal abdominal contraction maneuver (MACM) was designed as an effective and efficient breathing exercise to increase the stability of the spinal joint. However, it has not been determined whether MACM is more effective and efficient than the maximal expiration method. Thus, the present study was undertaken to investigate whole abdominal muscle thickness changes after MACM. Materials and Methods: Thirty healthy subjects (17 males and 13 females) participated in this study. An experimental comparison between MACM and the maximal expiration task was conducted by measuring the change of abdominal muscle thickness such as the transverse abdominis (TrA), internal oblique (IO), external oblique (EO) and rectus abdominis (RA) using ultrasound images. Results: The results indicated that MACM resulted in significantly greater muscle thickness increases of the TrA and RA than the maximal expiration exercise (p < 0.05). Conclusion: MACM provided better exercise than the maximal expiration exercise in terms of increasing spine stability, at least from a co-contraction perspective.
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Affiliation(s)
- Jung Won Kwon
- Department of Physical Therapy, College of Health Sciences, Dankook University, 119, Dandae-ro, Dongnam-gu, Cheonan-si, Chungnam 330-714, Korea;
| | - Seo Yoon Park
- Department of Health, Graduate School, Dankook University, 119, Dandae-ro, Dongnam-gu, Cheonan-si, Chungnam 330-714, Korea; (S.Y.P.); (K.H.B.)
| | - Ki Hyun Baek
- Department of Health, Graduate School, Dankook University, 119, Dandae-ro, Dongnam-gu, Cheonan-si, Chungnam 330-714, Korea; (S.Y.P.); (K.H.B.)
| | - Kyoungsoo Youk
- Department of Health Welfare, College of Health Sciences, Dankook University, 119, Dandae-ro, Dongnam-gu, Cheonan-si, Chungnam 330-714, Korea;
| | - Seunghue Oh
- Department of Health, Graduate School, Dankook University, 119, Dandae-ro, Dongnam-gu, Cheonan-si, Chungnam 330-714, Korea; (S.Y.P.); (K.H.B.)
- Correspondence: ; Tel.: +82-415-501-463; Fax: +82-415-597-934
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Shakeel F, Fang F, Kwon JW, Koo K, Pasternak AL, Henry NL, Sahai V, Kidwell KM, Hertz DL. Patients carrying DPYD variant alleles have increased risk of severe toxicity and related treatment modifications during fluoropyrimidine chemotherapy. Pharmacogenomics 2021; 22:145-155. [PMID: 33410339 DOI: 10.2217/pgs-2020-0154] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Aim: To evaluate toxicity risk in carriers of four DPYD variants using an institutional genetic repository. Materials & methods: Of over 65,000 patients in the repository, 582 were evaluated for the primary composite end point of grade 3 or higher toxicity or treatment modification due to toxicity. Results: The primary end point was more common in DPYD variant carriers (36.5 vs 18.1%, adjusted odds ratio 2.42, 95% CI: 1.05-5.55, p = 0.04), and in patients with decreased DPD activity (≤1 vs 2) (75.6 vs 17.0%, adjusted odds ratio 16.31, 95% CI: 2.64-100.68, p = 0.003). Conclusion: Patients carrying any of the four DPYD variants are at increased risk of severe toxicity or subsequent treatment modifications, suggesting such patients may benefit from genotype-informed treatment.
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Affiliation(s)
- Faisal Shakeel
- Department of Clinical Pharmacy, University of Michigan College of Pharmacy, Ann Arbor, MI 48109, USA
| | - Fang Fang
- Department of Biostatistics, School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jung Won Kwon
- Department of Clinical Pharmacy, University of Michigan College of Pharmacy, Ann Arbor, MI 48109, USA
| | - Kyoin Koo
- Department of Clinical Pharmacy, University of Michigan College of Pharmacy, Ann Arbor, MI 48109, USA
| | - Amy L Pasternak
- Department of Clinical Pharmacy, University of Michigan College of Pharmacy, Ann Arbor, MI 48109, USA
| | - N Lynn Henry
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA.,Department of Internal Medicine, Division of Hematology & Oncology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Vaibhav Sahai
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA.,Department of Internal Medicine, Division of Hematology & Oncology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Kelley M Kidwell
- Department of Biostatistics, School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA
| | - Daniel L Hertz
- Department of Clinical Pharmacy, University of Michigan College of Pharmacy, Ann Arbor, MI 48109, USA
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Yeo SS, Jang SH, Oh S, Kwon JW. Role of diffusion tensor imaging in analyzing the neural connectivity of the parieto-insular vestibular cortex in pusher syndrome: As case report. Medicine (Baltimore) 2020; 99:e19835. [PMID: 32312005 PMCID: PMC7220494 DOI: 10.1097/md.0000000000019835] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
RATIONALE Pusher syndrome is a disorder of postural control. It is associated with unilateral lesions on central vestibular system. In the current study, we attempted to identify and investigate neural connectivity of the parieto-insular vestibular cortex in a patient with pusher syndrome, using diffusion tensor imaging. PATIENT CONCERNS A 60-year-old male patient had left hemiplegia due to an infarction on right premotor cortex, primary motor cortex, corona radiata and temporal and occipital lobe. The patient had severe motor weakness in left upper and lower limb, left side neglect and significant pusher syndrome. DIAGNOSIS Patient was diagnosed with left hemiplegia due to an infarction in the right middle cerebral artery territory at the neurology department of a university hospital. INTERVENTIONS One patient and 5 control subjects of similar age participated. Diffusion tensor imaging data were acquired at 4-month and 12-month after the initial injury. OUTCOMES Fractional anisotropy, mean diffusivity, and tract volume (TV) were measured. TV values in both affected and unaffected hemispheres of the patient were significantly decreased at 4-month compared to those of control subjects. In the unaffected hemisphere of the patient, TV value showed significant increase at 12-month compared to that at 4-month. Although the TV value at 12-month of the affected hemisphere was out of reference range, TV was considerably increased compared to that at 4-month. Mean values for fractional anisotropy or mean diffusivity in 2 hemispheres did not show significant difference compared to those of control subjects regardless of month. LESSONS Restoration of an injured projection pathway between the vestibular nuclei and parieto-insular vestibular cortex with recovery of pusher syndrome was found in a patient with stroke.
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Affiliation(s)
- Sang Seok Yeo
- Department of Physical Therapy, College of Health Sciences, Dankook University
| | - Sung Ho Jang
- Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University
| | - Seunghue Oh
- Department of Health, Graduate School, Dankook University, Republic of Kore
| | - Jung Won Kwon
- Department of Physical Therapy, College of Health Sciences, Dankook University
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Jang SH, Yeo SS, Kwon JW, Kwon YH. Differences in Corticoreticulospinal Tract Injuries According to Whiplash in Mild Traumatic Brain Injury Patients. Front Neurol 2019; 10:1199. [PMID: 31849803 PMCID: PMC6896834 DOI: 10.3389/fneur.2019.01199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 10/28/2019] [Indexed: 12/05/2022] Open
Abstract
Background: This study investigated differences in postural control ability (PCA) and corticoreticulospinal tract (CRT) injury severity according to whiplash in patients with mild traumatic brain injury (mTBI). Methods: Thirty-one patients with mTBI and 21 healthy control subjects were recruited for this study. The balance error scoring system (BESS) was used for PCA assessment. Based on their whiplash history, the patients were classified into two groups: group A—mTBI with whiplash injury; group B—mTBI without whiplash injury. Fractional anisotropy (FA), apparent diffusion coefficient (ADC), and tract volume (TV) values were estimated for the reconstructed CRTs in all subjects. Results: Significant differences were observed among the total BESS scores of patient groups A and B and the control group (p < 0.05). The patient group A BESS score was significantly higher than that of patient group B, and that of the patient group B was significantly higher than that of the control group. No significant differences were detected among the FA and ADC values of the CRTs of the two patient groups and the control group (p > 0.05). However, the TV values of the CRT did reveal significant differences; the TV of patient group A was significantly lower than those of patient group B and the control group, and that of patient group B was significantly lower than that of the control group (p < 0.05). Conclusions: We observed greater CRT injury severity and PCA impairment in mTBI patients with whiplash than in mTBI patients without whiplash. The results indicate that whiplash might lead to a greater level of severity in axonal injuries in mTBI patients.
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Affiliation(s)
- Sung Ho Jang
- Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, Gyeongsan, South Korea
| | - Sang Seok Yeo
- Department of Physical Therapy, College of Health Sciences, Dankook University, Seoul, South Korea
| | - Jung Won Kwon
- Department of Physical Therapy, College of Health Sciences, Dankook University, Seoul, South Korea
| | - Young Hyeon Kwon
- Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, Gyeongsan, South Korea
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15
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Kim YI, Song KB, Lee YJ, Park KM, Hwang DW, Lee JH, Shin SH, Kwon JW, Ro JS, Kim SC. Management of isolated recurrence after surgery for pancreatic adenocarcinoma. Br J Surg 2019; 106:898-909. [PMID: 31162655 DOI: 10.1002/bjs.11144] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 07/10/2018] [Accepted: 01/25/2019] [Indexed: 12/31/2022]
Abstract
BACKGROUND Recurrence of pancreatic cancer after primary pancreatectomy occurs in the vast majority of patients. The role of surgical treatment for recurrent pancreatic cancer is not well established. METHODS Patients who underwent primary pancreatectomy with curative intent from 2000 to 2014 at a single large-volume centre were evaluated retrospectively. CT or PET was used to select patients with an isolated recurrence. The clinicopathological features and survival outcomes were compared according to treatment modalities. RESULTS Of the 1610 patients with pancreatic cancer who underwent resection, 1346 (83·6 per cent) were diagnosed with recurrent pancreatic cancer. Recurrence was locoregional in 366 patients (27·2 per cent), distant multifocal in 251 (18·6 per cent), distant isolated in 188 (14·0 per cent), locoregional plus distant in 153 (11·4 per cent) and peritoneal seeding in 388 (28·8 per cent). Of the 1346 patients with recurrence, 197 (14·6 per cent) had isolated recurrence; of these, 48 (24·4 per cent of all isolated recurrences; 3·6 per cent of all recurrences) underwent resection. Median survival of the 197 patients after diagnosis of isolated recurrence was 14·7 months; it was longer in patients who underwent surgical resection than among those treated non-surgically (23·5 versus 12·0 months; P = 0·014). Multivariable analysis showed that chemotherapy and resection for recurrence were associated with better prognosis. Median survival after recurrence was longest in the 23 patients with isolated pulmonary recurrence (33·3 months). Survival after recurrence was better in patients who underwent resection of isolated recurrence in the remnant pancreas (median 28·0 versus 12·0 months, P = 0·010) and lung (median 36·5 versus 9·5 months; P = 0·010) than in those who did not undergo resection. CONCLUSION Surgical resection may be considered an option for treatment of patients with isolated recurrent pancreatic cancer.
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Affiliation(s)
- Y I Kim
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, University of Ulsan College of Medicine, Asan Medical Centre, Seoul, South Korea
| | - K B Song
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, University of Ulsan College of Medicine, Asan Medical Centre, Seoul, South Korea
| | - Y-J Lee
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, University of Ulsan College of Medicine, Asan Medical Centre, Seoul, South Korea
| | - K-M Park
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, University of Ulsan College of Medicine, Asan Medical Centre, Seoul, South Korea
| | - D W Hwang
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, University of Ulsan College of Medicine, Asan Medical Centre, Seoul, South Korea
| | - J H Lee
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, University of Ulsan College of Medicine, Asan Medical Centre, Seoul, South Korea
| | - S H Shin
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, University of Ulsan College of Medicine, Asan Medical Centre, Seoul, South Korea
| | - J W Kwon
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, University of Ulsan College of Medicine, Asan Medical Centre, Seoul, South Korea
| | - J-S Ro
- Clinical Preventive Medicine Centre, Seoul National University Bundang Hospital, Bundang-gu, South Korea
| | - S C Kim
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, University of Ulsan College of Medicine, Asan Medical Centre, Seoul, South Korea
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Abstract
BACKGROUND Walking in daily life is often accompanied by an attention-demanding task, which requires a different attentional load and external environments. Therefore, various gaits require complex and systematic interactions between several nervous systems, such as sensory association, cognitive functions, and the musculoskeletal system. OBJECTIVE Dual-task conditions during gait can affect the interaction between cognitive processing and motor behavior. This study investigated the effect of two types of cognitive dual tasks and one type of manual dual task (MDT) on kinematic and spatiotemporal parameters of gait in young healthy adults. METHODS We recruited 30 healthy young adults in this study. All participants performed normal gait, and two types of cognitive tasks (subtraction dual task, SDT; and working memory dual task, WMDT) and MDT (carrying a cup filled with water) during gait. This study assessed kinematic data during the stance and swing phases and spatiotemporal parameters. RESULTS MDT gait showed a significant decrement of hip-joint movement during the stance phase compared to the normal gait (p < 0.05). Stride velocity significantly decreased during SDT and WMDT gait compared with the normal gait (p < 0.05). MDT gait showed significant decrement of all spatiotemporal parameters of gait compared with normal gait (p < 0.05). CONCLUSION We reported that MDT gait can induce decreased hip-joint motion during the stance phase and reduced all spatiotemporal parameters to maintain balance and reduce the risk of falling. Therefore, motor dual tasks while walking would be useful as an intervention strategy to rehabilitate or train people at risk for falling.
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Affiliation(s)
- Yonghyun Kwon
- Department of Physical Therapy, Yeungnam University College, Daegu, South Korea
| | - Jung Won Kwon
- Department of Physical Therapy, College of Health Sciences, Dankook University, Cheonan, South Korea
| | - In Hee Cho
- Department of Clinical Science, Graduate School of Health and Welfare, Dankook University, Cheonan, South Korea
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Abstract
Wheelchair skills training can improve independent wheeled mobility for daily living activities as well as functional and social participation of adults with cervical spinal cord injury (C-SCI). The objective of this study was to examine the effectiveness of wheelchair skills training in improving both wheelchair skills and upper arm skilled performance in adults with C-SCI. In a randomized controlled study, 24 adults with tetraplegia were randomized and allocated to training group (n=13) or control group (n=11). The training group attended wheelchair skills training sessions, whereas the control group attended conventional exercise sessions. All interventions lasted 8 weeks, with a frequency of 3 days per week. All individuals were tested with the Wheelchair Skills Test (WST) and the Van Lieshout Test (VLT). The test was repeated at pre- and post-training (after 4 weeks and 8 weeks). For WST, univariate analysis demonstrated significant main effects in between-group, within-group, and group-by-time interaction (p<0.05). VLT showed no significant effect in between-group comparison (p>0.05), whereas within-group comparison of test times and group-by-time interaction showed significant main effects (p<0.05). Thus, wheelchair skills training is more beneficial for adults with C-SCI than conventional exercise.
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Affiliation(s)
- Sang Seok Yeo
- Dankook University, College of Health Sciences, Department of Physical Therapy, Cheonan, Korea (the Republic of)
| | - Jung Won Kwon
- Dankook University, College of Health Sciences, Department of Physical Therapy, Cheonan, Korea (the Republic of)
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18
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Yeo SS, Jang SH, Kwon JW. Central vestibular disorder due to ischemic injury on the parieto-insular vestibular cortex in patients with middle cerebral artery territory infarction: Observational study. Medicine (Baltimore) 2017; 96:e9349. [PMID: 29390518 PMCID: PMC5758220 DOI: 10.1097/md.0000000000009349] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Central vestibular disorder is common after middle cerebral artery (MCA) territory infarction. The MCA supplies blood to the parieto-insular vestibular cortex (PIVC), a core region of central vestibular symptoms. We report on patients that sustained injuries of the core vestibular pathway to the PIVC with central vestibular disorder following MCA territory infarction, demonstrated on diffusion tensor imaging (DTI). Nineteen patients with MCA territory infarction and 12 control subjects were recruited. To reconstruct the core vestibular pathway to the PIVC, we defined seed region of interest (ROI) as vestibular nuclei of pons and target ROI as the PIVC. Fractional anisotropy (FA), mean diffusivity, and tract volume were measured. In the affected hemisphere, FA value of the core vestibular pathway to the PIVC revealed significant difference between all patient groups and the control group (P < .05). In contrast, patients with symptoms of ataxia only revealed significant decrement of tract volume compared with the control group (P < .05). Additionally, subgroup B revealed significant decrement of tract volume compared with that of subgroup A and the control group (P < .05). In the unaffected hemisphere, there was no significant difference in all DTI parameters between all patient groups and the control group (P < .05). Injury to the core vestibular pathway to the PIVC was demonstrated in patients that revealed typical central vestibular disorder following MCA territory infarction. Analysis of the core vestibular pathway to the PIVC using DTI would be beneficial in clinical evaluation and management of patients with MCA territory infarction.
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Affiliation(s)
- Sang Seok Yeo
- Department of Physical Therapy, College of Health Sciences, Dankook University, Republic of Korea
| | - Sung Ho Jang
- Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, South Korea
| | - Jung Won Kwon
- Assistant professor, Department of Physical Therapy, College of Health Sciences, Dankook University, Dandae-ro, Dongnam-gu, Cheonan-si, Chungnam, Republic of Korea
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19
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Kang H, Gwak HS, Shin SH, Woo MK, Jeong IH, Yoo H, Kwon JW, Lee SH. Monitoring rate and predictability of intraoperative monitoring in patients with intradural extramedullary and epidural metastatic spinal tumors. Spinal Cord 2017; 55:906-910. [PMID: 28485386 DOI: 10.1038/sc.2017.43] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Revised: 03/12/2017] [Accepted: 03/15/2017] [Indexed: 11/09/2022]
Abstract
STUDY DESIGN Single-center retrospective study. OBJECTIVES To evaluate the monitoring rate, sensitivity and specificity of intraoperative monitoring (IOM) during removal of intradural extramedullary (IDEM) or epidural metastatic spinal tumors. Also, to assess the efficacy of monitoring somatosensory-evoked potentials (SSEP) when motor-evoked potentials (MEP) are not measurable. SETTING The Neuro-Oncology Clinic, National Cancer Center, Korea. METHODS Patients (n=101) with IDEM or epidural metastatic spinal tumors at the cord level underwent surgeries monitored with SSEP and/or MEP. The monitoring rate was defined as negative when MEP or SSEP could not be measured after reversal of the neuromuscular block under general anesthesia. Positive IOM changes included more than a 50% change in the MEP or SSEP amplitude and more than a 10% delay in SSEP latency. RESULTS MEP was measurable in 73% of patients. The MEP monitoring rate in patients with motor power grades of 3 or less was 39%, which was lower than that of SSEP (83%). The sensitivity, specificity and predictability of MEP for motor changes were 93, 90 and 91%, respectively. Conversely, the sensitivity, specificity and predictability of SSEP were 62, 97 and 89%, respectively. In patients in whom MEP was not measurable (n=24), SSEP was monitored with a predictability of 83%. CONCLUSION In cases of extramedullary spinal tumors, MEP shows a higher sensitivity than SSEP does. However, the monitoring rate of MEP in non-ambulatory patients was lower than that of SSEP. In those cases, SSEP can be useful to monitor for postoperative neurological deficits.
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Affiliation(s)
- H Kang
- Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea
| | - H S Gwak
- Department of System Cancer Science, Graduate School of Cancer Science and Policy, Goyang, Korea
| | - S H Shin
- Neuro-Oncology Clinic, National Cancer Center, Goyang, Korea
| | - M K Woo
- Neurology Clinic, National Cancer Center, Goyang, Korea
| | - I H Jeong
- Neurology Clinic, National Cancer Center, Goyang, Korea
| | - H Yoo
- Neuro-Oncology Clinic, National Cancer Center, Goyang, Korea
| | - J W Kwon
- Neuro-Oncology Clinic, National Cancer Center, Goyang, Korea
| | - S H Lee
- Neuro-Oncology Clinic, National Cancer Center, Goyang, Korea
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Kwon JW, Son SM, Lee NK. Changes in upper-extremity muscle activities due to head position in subjects with a forward head posture and rounded shoulders. J Phys Ther Sci 2015; 27:1739-42. [PMID: 26180310 PMCID: PMC4499973 DOI: 10.1589/jpts.27.1739] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 02/14/2015] [Indexed: 01/08/2023] Open
Abstract
[Purpose] This study investigated upper-extremity muscle activities in natural, ideal,
and corrected head positions. [Subjects and Methods] Forty subjects with a forward head
posture and rounded shoulder were recruited and randomly assigned to the natural head
position group (n = 13), ideal head position group (n =
14), or corrected head position group (n = 13). Muscle activities were
measured using a four-channel surface electromyography system at the
sternocleidomastoideus, upper and lower trapezius, and serratus anterior muscles on the
right side during an overhead reaching task. [Results] The muscle activities of the upper
trapezius and serratus anterior differed significantly among head positions. Post hoc
tests revealed significant differences between natural and ideal head positions, and
natural and ideal head positions for both the upper trapezius and serratus anterior.
[Conclusion] Recovery of normal upper trapezius and serratus anterior muscle functions
plays an important role in correcting forward head posture and rounded shoulders.
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Affiliation(s)
- Jung Won Kwon
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
| | - Sung Min Son
- Department of Physical Therapy, College of Health Science, Cheongju University, Republic of Korea
| | - Na Kyung Lee
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
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21
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Kang KW, Lee NK, Son SM, Kwon JW, Kim K. Effect of handrail use while performing treadmill walking on the gait of stroke patients. J Phys Ther Sci 2015; 27:833-5. [PMID: 25931741 PMCID: PMC4395725 DOI: 10.1589/jpts.27.833] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 10/26/2014] [Indexed: 11/26/2022] Open
Abstract
[Purpose] The purpose of this study was to investigate how the use of handrails during
treadmill walking affects the gait parameters of stroke patients. [Subjects and Methods]
The participants, 30 hemiplegic stroke patients, were randomly allocated to one of three
groups: the NHG group (No Handrail group, n=10), the FHG group (Front handrail group,
n=10), and BHG group (Bilateral Handrail group, n=10). All the subjects’ performed
treadmill walking for 30 min, five days a week, for a period of eight weeks. Gait
parameters were evaluated using the RS-scan system. [Results] A statistically significant
difference in the HM (heel-medial) area of plantar foot pressure was observed between BHG
and NHG. Statistically significant difference in the HL (heel-lateral) area of plantar
foot pressure was observed between BHG and NHG, and between FHG and NHG. A statistically
significant difference in contact area of the rear foot was observed between BHG and NHG.
[Conclusion] The results of this study show that holding handrails during treadmill
training may enhance the improvement in the quality of patients’ gait (plantar foot
pressure, contact area of foot).
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Affiliation(s)
- Kyung Woo Kang
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
| | - Na Kyung Lee
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
| | - Sung Min Son
- Department of Physical Therapy, College of Health Science, Cheongju University, Republic of Korea
| | - Jung Won Kwon
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
| | - Kyoung Kim
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
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Kang KW, Kim K, Lee NK, Kwon JW, Son SM. Effect of constrained weight shift on the static balance and muscle activation of stroke patients. J Phys Ther Sci 2015; 27:777-80. [PMID: 25931729 PMCID: PMC4395713 DOI: 10.1589/jpts.27.777] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Accepted: 10/21/2014] [Indexed: 12/02/2022] Open
Abstract
[Purpose] The purpose of this study was to evaluate the effects of constrained weight
shift induced by shoe lift beneath the unaffected lower extremity, on balance functions
and electromyography of the affected lower extremity of stroke patients. [Subjects and
Methods] Twelve patients with unilateral stroke were recruited as volunteers for this
study. The subjects were repeatedly measured in a randomized order under three conditions:
no-shoe lift, and shoe lifts of 5 mm and 10 mm heights beneath the unaffected lower
extremity. [Results] Standing with a 10 mm shoe lift for the unaffected lower extremity
decreased the mean velocity of mediolateral sway compared to no-shoe lift. Regarding the
velocity of anteroposterior sway, standing with 5 mm and 10 mm shoe lifts decreased the
mean velocity of anteroposterior sway. The muscle activation of the affected lower
extremity was not significantly different among the no-shoe lift, 5 mm shoe lift and 10 mm
shoe lift conditions; however, the muscle activities of the rectus femoris, biceps
femoris, tibialis anterior, and medial gastrocnemius of the affected lower extremity
progressively improved with increasing height of the shoe lift. [Conclusion] A constrained
weight shift to the affected side elicited by a shoe insole of 10 mm height on the
unaffected side can improve the static standing balance of stroke patients, and it
resulted in 14–24% increases in the muscle activities of the affected leg.
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Affiliation(s)
- Kyung Woo Kang
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
| | - Kyoung Kim
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
| | - Na Kyung Lee
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
| | - Jung Won Kwon
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
| | - Sung Min Son
- Department of Physical Therapy, College of Health Science, Cheongju University, Republic of Korea
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Kwon YH, Kwon JW, Lee MH. Effectiveness of motor sequential learning according to practice schedules in healthy adults; distributed practice versus massed practice. J Phys Ther Sci 2015; 27:769-72. [PMID: 25931727 PMCID: PMC4395711 DOI: 10.1589/jpts.27.769] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 10/21/2014] [Indexed: 11/24/2022] Open
Abstract
[Purpose] The purpose of the current study was to compare the effectiveness of motor sequential learning according to two different types of practice schedules, distributed practice schedule (two 12-hour inter-trial intervals) and massed practice schedule (two 10-minute inter-trial intervals) using a serial reaction time (SRT) task. [Subjects and Methods] Thirty healthy subjects were recruited and then randomly and evenly assigned to either the distributed practice group or the massed practice group. All subjects performed three consecutive sessions of the SRT task following one of the two different types of practice schedules. Distributed practice was scheduled for two 12-hour inter-session intervals including sleeping time, whereas massed practice was administered for two 10-minute inter-session intervals. Response time (RT) and response accuracy (RA) were measured in at pre-test, mid-test, and post-test. [Results] For RT, univariate analysis demonstrated significant main effects in the within-group comparison of the three tests as well as the interaction effect of two groups × three tests, whereas the between-group comparison showed no significant effect. The results for RA showed no significant differences in neither the between-group comparison nor the interaction effect of two groups × three tests, whereas the within-group comparison of the three tests showed a significant main effect. [Conclusion] Distributed practice led to enhancement of motor skill acquisition at the first inter-session interval as well as at the second inter-interval the following day, compared to massed practice. Consequentially, the results of this study suggest that a distributed practice schedule can enhance the effectiveness of motor sequential learning in 1-day learning as well as for two days learning formats compared to massed practice.
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Affiliation(s)
- Yong Hyun Kwon
- Department of Physical Therapy, Yeungnam University
College, Republic of Korea
| | - Jung Won Kwon
- Department of Physical Therapy, Yeungnam University
College, Republic of Korea
| | - Myoung Hee Lee
- Department of Physical Therapy, Uiduk University, Republic of
Korea
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Kwon JW, Son SM, Lee NK. Changes of kinematic parameters of lower extremities with gait speed: a 3D motion analysis study. J Phys Ther Sci 2015; 27:477-9. [PMID: 25729195 PMCID: PMC4339165 DOI: 10.1589/jpts.27.477] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 09/02/2014] [Indexed: 12/02/2022] Open
Abstract
[Purpose] The purpose of this study was to investigate the changes in hip, knee and ankle
kinematic variables of the lower extremities at different gait speeds. [Subjects and
Methods] Forty healthy subjects who had no previous history of neurological,
musculo-skeletal or other medical conditions that could affect gait were recruited. The
subjects were asked to walk 10 m down a walkway at three different gait speeds: normal
gait speed, and self-selected fast, and slow speeds. The experimental order was randomly
chosen across these gaits. The hip, knee and ankle kinematic data were evaluated using a
VICON 3D motion analysis system and force plates. [Results] The flexion peak and external
rotation peak of the knee joint significantly increased with the increase of gait speed.
The plantarflexion peaks of the ankle joint significantly increased with increase of gait
speed. However, none of the kinematic data of the hip joint were significantly dependent
on increase of gait speed. [Conclusion] The relationship of the knee and ankle joint can
be described as coupling motion which is dependent on gait speed. Our present findings
suggest that coupling motion of the knee joint and plantarflexion of the ankle joint
significantly increase with increase of gait speed. These results will provide important
insight into gait mechanisms for the evaluation of pathological populations.
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Affiliation(s)
- Jung Won Kwon
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
| | - Sung Min Son
- Department of Physical Therapy, College of Health Science, Cheongju University, Republic of Korea
| | - Na Kyung Lee
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
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Abstract
This study investigated the prevalence of pain in the ipsilateral upper-limb in stroke patients. 229 stroke patients (133 men, 96 women; M age = 59.0 yr., SD = 12.4) were assessed with the Pain Behaviors Scales and their motor weakness was measured with the Motricity Index. Results indicated that over 27% of patients experienced pain in at least one joint of the ipsilateral upper limb. Shoulder pain was the most common. Further analysis indicated that the occurrence of pain in the ipsilateral upper limb was higher among women, among patients who used a cane, and among patients with a greater weakness of the affected lower limb.
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Affiliation(s)
- Yong Hyun Kwon
- 1 Department of Physical Therapy, Yeungnam University College, Republic of Korea
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Kwon YH, Kwon JW. Is transcranial direct current stimulation a potential method for improving response inhibition? Neural Regen Res 2014; 8:1048-54. [PMID: 25206399 PMCID: PMC4145879 DOI: 10.3969/j.issn.1673-5374.2013.11.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Accepted: 03/06/2013] [Indexed: 12/03/2022] Open
Abstract
Inhibitory control of movement in motor learning requires the ability to suppress an inappropriate action, a skill needed to stop a planned or ongoing motor response in response to changes in a variety of environments. This study used a stop-signal task to determine whether transcranial direct-current stimulation over the pre-supplementary motor area alters the reaction time in motor inhibition. Forty healthy subjects were recruited for this study and were randomly assigned to either the transcranial direct-current stimulation condition or a sham-transcranial direct-current stimulation condition. All subjects consecutively performed the stop-signal task before, during, and after the delivery of anodal transcranial direct-current stimulation over the pre-supplementary motor area (pre-transcranial direct-current stimulation phase, transcranial direct-current stimulation phase, and post-transcranial direct-current stimulation phase). Compared to the sham condition, there were significant reductions in the stop-signal processing times during and after transcranial direct-current stimulation, and change times were significantly greater in the transcranial direct-current stimulation condition. There was no significant change in go processing-times during or after transcranial direct-current stimulation in either condition. Anodal transcranial direct-current stimulation was feasibly coupled to an interactive improvement in inhibitory control. This coupling led to a decrease in the stop-signal process time required for the appropriate responses between motor execution and inhibition. However, there was no transcranial direct-current stimulation effect on the no-signal reaction time during the stop-signal task. Transcranial direct-current stimulation can adjust certain behaviors, and it could be a useful clinical intervention for patients who have difficulties with response inhibition.
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Affiliation(s)
- Yong Hyun Kwon
- Department of Physical Therapy, Yeungnam College of Science & Technology, Daegu 705-703, Republic of Korea
| | - Jung Won Kwon
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Gyeongbuk 712-714, Republic of Korea
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Lee NK, Kwon JW, Son SM, Kang KW, Kim K, Hyun-Nam S. The effects of closed and open kinetic chain exercises on lower limb muscle activity and balance in stroke survivors. NeuroRehabilitation 2014; 33:177-83. [PMID: 23949042 DOI: 10.3233/nre-130943] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE The major contributors to physical disability after stroke are the negative impairments related to loss of functional ability and muscle strength. The aim of this study was to examine the effects of close kinetic chain (CKC) exercise and open kinetic chain (OKC) exercise on muscle activation of the paretic lower limb and balance in chronic stroke subjects. METHODS Thirty-three patients with chronic stroke of over 6 months were enrolled. They were randomly allocated to three groups: CKC exercise group (n = 11), OKC exercise group (n = 11), and control group (n = 11). CKC and OKC exercise groups were trained 5 times per week for 6 weeks. The control group maintained routine activities and did not participate in any regular exercise program. All subjects were measured on muscle activation of the paretic lower limb and balance. RESULTS Muscle activation of rectus femoris (RF) and biceps femoris (BF) was significantly increased in both CKC exercise and OKC exercise groups, compared to the control group. However, muscle activation of gastrocnemius (GC) and tibialis anterior (TA) was significantly increased in only the CKC exercise group. Antero-posterior (A-P) andmedio-lateral (M-L) sway velocities (both with EO and EC) were decreased with the application of CKC exercise. CONCLUSION These findings indicate that the CKC exercise can improve lower limb muscle strength, and balance in chronic stroke, and it may carry over into an improvement in functional performance.
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Affiliation(s)
- Na Kyung Lee
- Department of Rehabilitation Science, Graduate school, Daegu University, Kyeongbuk, Republic of Korea
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Kim SC, Lee MH, Jang C, Kwon JW, Park JW. The effect of alpha rhythm sleep on EEG activity and individuals' attention. J Phys Ther Sci 2014; 25:1515-8. [PMID: 24409009 PMCID: PMC3885828 DOI: 10.1589/jpts.25.1515] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Accepted: 12/25/2012] [Indexed: 11/24/2022] Open
Abstract
[Purpose] This study examined whether the alpha rhythm sleep alters the EEG activity and
response time in the attention and concentration tasks. [Subjects and Methods] The
participants were 30 healthy university students, who were randomly and equally divided
into two groups, the experimental and control groups. They were treated using the
Happy-sleep device or a sham device, respectively. All participants had a one-week
training period. Before and after training sessions, a behavioral task test was performed
and EEG alpha waves were measured to confirm the effectiveness of training on cognitive
function. [Results] In terms of the behavioral task test, reaction time (RT) variations in
the experimental group were significantly larger than in the control group for the
attention item. Changes in the EEG alpha power in the experimental group were also
significantly larger than those of the control group. [Conclusions] These findings suggest
that sleep induced using the Happy-sleep device modestly enhances the ability to pay
attention and focus during academic learning.
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Affiliation(s)
- Seon Chill Kim
- Department of Physical Therapy, Daegu Health College, Republic of Korea
| | - Myoung Hee Lee
- Department of Physical Therapy, College of Science, Kyungsung University, Republic of Korea
| | - Chel Jang
- Department of Occupational Therapy, Kyungnam College of Information and Technology, Republic of Korea
| | - Jung Won Kwon
- Department of Rehabilitation Science, Graduate School, Daegu University, Republic of Korea
| | - Joo Wan Park
- Department of Rehabilitation Science, Graduate School, Daegu University, Republic of Korea
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Lee NK, Son SM, Nam SH, Kwon JW, Kang KW, Kim K. Effects of progressive resistance training integrated with foot and ankle compression on spatiotemporal gait parameters of individuals with stroke. J Phys Ther Sci 2013; 25:1235-7. [PMID: 24259765 PMCID: PMC3820171 DOI: 10.1589/jpts.25.1235] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 05/15/2013] [Indexed: 11/24/2022] Open
Abstract
[Purpose] The purpose of this study was to investigate the effect of progressive resistance training (PRT) integrated with foot and ankle compression on the gait ability of post-stroke patients. [Subjects and Methods] Participants were randomly allocated to two groups: the PRT group (n=14) and the control group (n=14). Subjects in the PRT group received training for 30 minutes, five days per week, for a period of six weeks. Gait ability was evaluated using the RsScan system. [Results] Use of PRT integrated with foot and ankle compression resulted in significant improvements in temporal parameters (gait velocity, step time, and double limb support) and spatial parameters (step length, stride length, and heel-to- heel base of support). [Conclusion] Progressive resistance training integrated with foot and ankle compression improved the gait ability of stroke patients. These results suggest the feasibility and suitability of integration of PRT with foot and ankle compression for individuals with stroke.
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Affiliation(s)
- Na Kyung Lee
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
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Son SM, Kang KW, Lee NK, Nam SH, Kwon JW, Kim K. Influence of Isokinetic Strength Training of Unilateral Ankle on Ipsilateral One-legged Standing Balance of Adults. J Phys Ther Sci 2013; 25:1313-5. [PMID: 24259783 PMCID: PMC3820187 DOI: 10.1589/jpts.25.1313] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Accepted: 05/29/2013] [Indexed: 01/19/2023] Open
Abstract
[Purpose] The purpose of the current study was to investigate the changes in one-legged
standing balance of the ipsilateral lower limb following unilateral isokinetic strength
training. [Subjects and Methods] Thirty healthy adult volunteers were randomly assigned to
either a training group or a control group, so that each group included 15 subjects.
Subjects in the training group performed unilateral ankle isokinetic exercises of the
dominant leg using the Biodex 3 PRO System for a period of four weeks. Ipsilateral
one-legged standing balance was evaluated before and after the intervention with three
stability indexes of balance using the Biodex System: Anterior-Posterior Stability Index
(APSI), Medial-Lateral Stability Index (MLSI), and Overall Stability Index (OSI).
[Results] Comparison of pre- and post-test data revealed significant improvements in
strength values (dorsiflexion, plantarflexion, eversion, and inversion) and stability
indexes (APSI, MLSI, OSI). [Conclusion] These results suggest that ankle strengthening
exercise can be considered as a form of exercise that may assist individuals with
improvement of balance.
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Affiliation(s)
- Sung Min Son
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
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Kwon YH, Kwon JW. Response Inhibition Induced in the Stop-signal Task by Transcranial Direct Current Stimulation of the Pre-supplementary Motor Area and Primary Sensoriomotor Cortex. J Phys Ther Sci 2013; 25:1083-6. [PMID: 24259920 PMCID: PMC3818760 DOI: 10.1589/jpts.25.1083] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 04/14/2013] [Indexed: 11/24/2022] Open
Abstract
[Purpose] This study examined whether transcranial direct current stimulation (tDCS) of both the pre-supplementary motor area (pre-SMA) and primary sensoriomotor cortex (M1) alters the response time in response inhibition using the stop-signal task (SST). [Methods] Forty healthy subjects were enrolled in this study. The subjects were randomly tested under the three: the pre-SMA tDCS, M1 tDCS, and Sham tDCS conditions. All subjects performed a SST in two consecutive phases: without or after the delivery of anodal tDCS over one of the target sites (pre-SMA or the M1) and under the Sham tDCS condition. [Results] Our findings demonstrated significant reductions in the stop processing times after the anodal tDCS over pre-SMA, and change response times were significantly greater under the pre-SMA tDCS condition compared to both the M1 tDCS condition and the Sham tDCS condition. There was no significant major effect after delivery of the tDCS for the go processing times observed among the three conditions. [Conclusion] Anodal tDCS of the pre-SMA or M1 during performance of the SST resulted in enhancement of the volitional stop movement in inhibitory control. Our results suggest that when concurrently applied with the SST, tDCS might be a useful adjuvant therapeutic modality for modulation of the response inhibition and its related dynamic behavioral changes between motor execution and suppression.
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Affiliation(s)
- Yong Hyun Kwon
- Department of Physical Therapy, Yeungnam College of Science and Technology
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Lee NK, Kwon JW, Son SM, Nam SH, Choi YW, Kim CS. Changes of plantar pressure distributions following open and closed kinetic chain exercise in patients with stroke. NeuroRehabilitation 2013; 32:385-90. [PMID: 23535803 DOI: 10.3233/nre-130859] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE The aim of this study is to investigate whether progressive resistive training with closed-kinetic chain (CKC) and open-kinetic chain (OKC) exercises could change plantar pressure distribution during walking in patients with stroke. METHODS Thirty-nine stroke patients were recruited and randomly divided into a CKC exercise group (n = 13), an OKC exercise group (n = 13), and a control group (n = 13). Both CKC and OKC exercise groups performed their own respective training programs 5 times per week for 6 weeks, whereas no training was done in the control group. Barefoot plantar pressure distribution was measured during walking in terms of contact area (CA), peak contact force (PCF), and contact impulse (CI) on each of three foot regions (i.e. forefoot (FF), midfoot (MF), and hindfoot (HF)). RESULTS In the CKC exercise group, there were significant changes in only the CA and PCF of HF. In the OKC exercise and control groups, no significant differences were found for all variables of plantar pressure distributions. CONCLUSION We found that resistive training with closed kinetic chain exercises could be an effective treatment method for improving normal gait patterns in stroke patients. These findings may be attributed to the fact that CKC exercise induced use of the ankle and knee muscles and provided repetitive sensory input from the affected foot.
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Affiliation(s)
- Na Kyung Lee
- Department of Rehabilitation Science, Graduate School, Daegu University, Kyeongbuk, Republic of Korea
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Nam SH, Son SM, Kwon JW, Lee NK. The Intra- and Inter-rater Reliabilities of the Forward Head Posture Assessment of Normal Healthy Subjects. J Phys Ther Sci 2013; 25:737-9. [PMID: 24259842 PMCID: PMC3804999 DOI: 10.1589/jpts.25.737] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Accepted: 02/15/2013] [Indexed: 12/25/2022] Open
Abstract
[Purpose] Assessment of posture is an important goal of physical therapy interventions for preventing the progression of forward head posture (FHP). The purpose of this study was to determine the inter- and intra-rater reliabilities of the assessment of FHP. [Subjects and Methods] We recruited 45 participants (20 male subjects, 25 female subjects) from a university student population. Two physical therapists assessed FHP using images of head extension. FHP is characterized by the measurement of angles and distances between anatomical landmarks. Forward shoulder angle of 54° or less was defined as FHP. Intra- and inter-rater reliabilities were estimated using Kendall's Taub correlation coefficients. [Results] Intra-class correlation of intra-rater measurements indicated an excellent level of reliability (0.91), and intra-class correlation of inter-rater measurements showed a good level of reliability in the assessment of FHP (0.75). [Conclusion] Assessment of FHP is an important component of evaluation and affects the design of the treatment regimen. The assessment of FHP was reliably measured by two physical therapists. It could therefore become a useful method for assessing FHP in the clinical setting. Future studies will be needed to provide more detailed quantitative data for accurate assessment of posture.
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Affiliation(s)
- Seok Hyun Nam
- Department of Physical Therapy, College of Rehabilitation
Science, Daegu University
| | - Sung Min Son
- Department of Physical Therapy, College of Rehabilitation
Science, Daegu University
| | - Jung Won Kwon
- Department of Physical Therapy, College of Rehabilitation
Science, Daegu University
| | - Na Kyung Lee
- Department of Physical Therapy, College of Rehabilitation
Science, Daegu University
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Kwon YH, Kwon JW, Park JW. Changes in brain activation patterns according to cross-training effect in serial reaction time task: An functional MRI study. Neural Regen Res 2013; 8:639-46. [PMID: 25206709 PMCID: PMC4145986 DOI: 10.3969/j.issn.1673-5374.2013.07.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 02/16/2013] [Indexed: 12/03/2022] Open
Abstract
Cross-training is a phenomenon related to motor learning, where motor performance of the untrained limb shows improvement in strength and skill execution following unilateral training of the homologous contralateral limb. We used functional MRI to investigate whether motor performance of the untrained limb could be improved using a serial reaction time task according to motor sequential learning of the trained limb, and whether these skill acquisitions led to changes in brain activation patterns. We recruited 20 right-handed healthy subjects, who were randomly allocated into training and control groups. The training group was trained in performance of a serial reaction time task using their non-dominant left hand, 40 minutes per day, for 10 days, over a period of 2 weeks. The control group did not receive training. Measurements of response time and percentile of response accuracy were performed twice during pre- and post-training, while brain functional MRI was scanned during performance of the serial reaction time task using the untrained right hand. In the training group, prominent changes in response time and percentile of response accuracy were observed in both the untrained right hand and the trained left hand between pre- and post-training. The control group showed no significant changes in the untrained hand between pre- and post-training. In the training group, the activated volume of the cortical areas related to motor function (i.e., primary motor cortex, premotor area, posterior parietal cortex) showed a gradual decrease, and enhanced cerebellar activation of the vermis and the newly activated ipsilateral dentate nucleus were observed during performance of the serial reaction time task using the untrained right hand, accompanied by the cross-motor learning effect. However, no significant changes were observed in the control group. Our findings indicate that motor skills learned over the 2-week training using the trained limb were transferred to the opposite homologous limb, and motor skill acquisition of the untrained limb led to changes in brain activation patterns in the cerebral cortex and cerebellum.
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Affiliation(s)
- Yong Hyun Kwon
- Department of Physical Therapy, Yeungnam College of Science & Technology, Daegu, Damgu 705-703, Republic of Korea
| | - Jung Won Kwon
- Department of Physical Therapy, Yeungnam College of Science & Technology, Daegu, Damgu 705-703, Republic of Korea
| | - Ji Won Park
- Department of Physical Therapy, College of Health Science, Catholic University of Daegu, Gyeongsan-si, Kyeongbuk 712-702, Republic of Korea
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Kwon JW, Nam SH, Lee NK, Son SM, Choi YW, Kim CS. The effect of transcranial direct current stimulation on the motor suppression in stop-signal task. NeuroRehabilitation 2013; 32:191-6. [DOI: 10.3233/nre-130836] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Jung Won Kwon
- Department of Rehabilitation Science, Graduate school, Daegu University, Republic of Korea
| | - Seok Hyun Nam
- Department of Rehabilitation Science, Graduate school, Daegu University, Republic of Korea
| | - Na Kyung Lee
- Department of Rehabilitation Science, Graduate school, Daegu University, Republic of Korea
| | - Sung Min Son
- Department of Rehabilitation Science, Graduate school, Daegu University, Republic of Korea
| | - Yong Won Choi
- Department of Rehabilitation Science, Graduate school, Daegu University, Republic of Korea
| | - Chung Sun Kim
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Republic of Korea
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Bhandary B, Lee HY, Back HI, Park SH, Kim MG, Kwon JW, Song JY, Lee HK, Kim HR, Chae SW, Chae HJ. Immature Rubus coreanus Shows a Free Radical-Scavenging Effect and Inhibits Cholesterol Synthesis and Secretion in Liver Cells. Indian J Pharm Sci 2013; 74:211-6. [PMID: 23440938 PMCID: PMC3574530 DOI: 10.4103/0250-474x.106062] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Revised: 05/16/2012] [Accepted: 05/20/2012] [Indexed: 11/12/2022] Open
Abstract
Rubus coreanus fruits have been employed as a traditional medicine for centuries in the Asia-Pacific region. Its pharmacological action differs according to the different extraction methods utilized and the degree of fruit ripening. In this study, we determined the cellular effect of different ethanol extracts of mature and immature Rubus coreanus fruits in human hepatic cell line, HepG2 cells. The antioxidant activity, effect on superoxide dismutase activity and cholesterol biosynthesis efficiency was also evaluated. Immature Rubus coreanus extract showed higher antioxidant capability, compared with that of its mature fractions. Cellular antioxidant proteins including HO-1, Cu/Zn-superoxide dismutase and catalase were highly expressed in the presence of Rubus coreanus. Cholesterol levels in HepG2 cells treated with the water fraction of immature Rubus coreanus were significantly reduced. This antihyperlipidaemic action of Rubus coreanus is a consequence of cholesterol biosynthesis and extracellular secretion in HepG2 cells. These results indicate that among different ethanol fraction of mature and immature Rubus coreanus fruit extracts, water extract of immature fruit extract shows higher antioxidant as well as higher antihyperlipidaemic action.
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Affiliation(s)
- B Bhandary
- Department of Pharmacology, Institute of Cardiovascular Research, College of Medicine, Chonbuk National University, Jeonju-565 701, Republic of Korea
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Son SM, Kwon JW, Nam SH, Lee NK, Kim K, Kim CS. Adverse effects of motor-related symptoms on the ipsilateral upper limb according to long-term cane usage. NeuroRehabilitation 2012; 31:137-41. [PMID: 22951707 DOI: 10.3233/nre-2012-0782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE Although the cane is prescribed to aid in daily living and social participation in stroke patients, this study aimed to identify whether long-term cane usage affected sensorimotor functions in the distal part of the non-affected upper limb in relation to a tracking task, a nine-hole pegboard test, and proprioceptive joint sense. PATIENT AND METHOD Forty stroke patients who were divided into a cane using group (CUG) or a non-cane using group (NCUG) participated in this study. Subjects were evaluated in a tracking task for visuomotor coordination, a nine-hole pegboard test for dexterous hand motion, and a joint reposition test for proprioceptive sense integrity. RESULT Comparison of the CUG and NCUG revealed significant differences in performance of the tracking task, the nine-hole pegboard test, and the joint reposition test (p < 0.05). The CUG had more difficulty performing visuomotor coordination and dexterous hand motion tasks compared with the NCUG. Proprioceptive joint sense was also deteriorated in the CUG. CONCLUSION These results suggest that stroke patients who use a cane for a long period, could experience decreased sensorimotor function in the ipsilateral upper limb of a damaged hemisphere. Therefore, it will be necessary to provide careful evaluation and appropriate therapeutic intervention for stroke patients who require the use of a cane over a long period.
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Affiliation(s)
- Sung Min Son
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University, Kyeongbuk, Korea
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Lee SY, Kwon JW, Seo JH, Song YH, Kim BJ, Yu J, Park KS, Kim H, Kim EJ, Lee JS, Hong SJ. Prevalence of atopy and allergic diseases in Korean children: associations with a farming environment and rural lifestyle. Int Arch Allergy Immunol 2012; 158:168-74. [PMID: 22286539 DOI: 10.1159/000330820] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Accepted: 07/11/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The results of recent studies suggest that factors in rural environments may protect against the development of allergic diseases, but the underlying mechanisms are not well understood. The aim of this study was to investigate the prevalence of allergic diseases, to establish if this prevalence is influenced by migration from rural to urban areas and to identify environmental risk factors associated with these diseases. METHODS A cross-sectional study of children aged 9-12 years from a rural village, a rural town and an urban city in Korea was conducted. Demographic and disease-related information was obtained via a detailed questionnaire, and skin prick tests were performed. RESULTS There were significant differences in lifestyle and environmental factors between children from the rural village, the rural town and the urban children. The prevalence of allergic diseases and atopy was higher in urban children. A lower prevalence of allergic diseases and atopy was associated with farming parents, contact with farm animals during pregnancy, owning pets or a stable, breast-feeding and having older siblings. A comparison of rural village and rural town children revealed no evidence of an association of allergic diseases and atopy with farming parents, contact with farm animals during pregnancy or owning a stable. On the other hand, having older siblings and antibiotic use during infancy were significantly associated with allergic diseases and atopy in these children. CONCLUSIONS Protective factors associated with a farming environment and/or rural lifestyle may influence the prevalence of allergic diseases and atopy in Korean children.
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Affiliation(s)
- S Y Lee
- Department of Pediatrics, Childhood Asthma Atopy Center, Asan Medical Center, University of Ulsan College of Medicine, School of Public Health, Seoul, Korea
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Nam KS, Kwon JW, Kwon OY. The Relationship between Activity of Abductor Hallucis and Navicular Drop in the One-leg Standing Position. J Phys Ther Sci 2012. [DOI: 10.1589/jpts.24.1103] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Ki Seok Nam
- Department of Physical Therapy, Yeungnam College of Science and Technology
| | - Jung Won Kwon
- Department of Rehabilitation Science, Graduate School, Daegu University
| | - Oh-Yun Kwon
- Department of Physical Therapy, Kinetic Ergocise Based on Movement Analysis Laboratory, College of Health Science, Yonsei University
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Kwon JW, Park SY, Son SM, Kim CS. Correlation between Assessments of Arm and Leg Ideomotor Apraxia in Hemiplegic Stroke Patients. J Phys Ther Sci 2012. [DOI: 10.1589/jpts.24.187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Jung Won Kwon
- Department of Rehabilitation Science, Graduate School, Daegu University
| | - Sang Young Park
- Department of Rehabilitation Science, Graduate School, Daegu University
| | - Sung Min Son
- Department of Rehabilitation Science, Graduate School, Daegu University
| | - Chung Sun Kim
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University
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Cha JH, Chung HW, Kwon JW, Choi BK, Lee SH, Shin MJ. Longitudinal split of the posterior cruciate ligament: description of a new MR finding and evaluation of its potential clinical significance. Clin Radiol 2011; 66:269-74. [PMID: 21295207 DOI: 10.1016/j.crad.2010.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Revised: 11/22/2010] [Accepted: 11/24/2010] [Indexed: 11/27/2022]
Abstract
AIM To evaluate the clinical significance of the intra-substance longitudinal split of the posterior cruciate ligament (LS-PCL) and to evaluate its potential clinical significance on MRI. MATERIALS AND METHODS The databases of two centres were searched for LS-PCL, 6917 knee magnetic resonance imaging (MRI) examinations undertaken were retrospectively reviewed. LS-PCL was defined as increased signal intensity in a PCL in the longitudinal direction, but with an intact ligament outer surface on MRI. Twelve patients were enrolled in this study. Available arthroscopic results, degree of posterior knee instability, and changes in MRI findings, or the degree of instability during follow-up (FU), were reviewed from the patients medical records and via their MRI images. MRI images were reviewed by two musculoskeletal radiologists in consensus for presence and location of LS-PCL and any combined injuries: menisci lesions, ligament injuries, and bone marrow changes. RESULTS Seven of 12 patients (58.3%) had morphological or functional evidence of PCL injury or insufficiency according to the change of posterior instability on FU stress testing (n=3), insufficiency during arthroscopy (n=2), or decreased extent and altered shape of the PCL split on the FU MRI (n=3). One patient revealed both change of posterior instability on FU stress testing and insufficiency during arthroscopy. Combined injuries were revealed in seven patients. Five patients had isolated LS-PCL: two patients underwent arthroscopic PCL reconstructions; and another three patients revealed knee instability on stress testing. CONCLUSION Although LS-PCL has not been described before, it can be a type of partial tear of the PCL, which causes PCL insufficiency.
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Affiliation(s)
- J H Cha
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea
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Affiliation(s)
- Yong Hyun Kwon
- Department of Physical Therapy, Yeungnam College of Science & Technology
| | - Jung Won Kwon
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University
| | - Sang Young Park
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University
| | - Mi Young Lee
- Department of Physical Therapy, College of Health and Therapy, Daegu Haany University
| | - Sung Ho Jang
- Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University
| | - Chung Sun Kim
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University
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Kwon YH, Yeo SS, Kwon JW, Hwang YT, Park MK, Kim CS. Neuromuscular Adaptation Induced by Motor Imagery Training in the Serial Reaction Time Task. J Phys Ther Sci 2010. [DOI: 10.1589/jpts.22.413] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Yong Hyun Kwon
- Department of Physical Therapy, Yeungnam College of Science & Technology
| | - Sang Seok Yeo
- Department of Rehabilitation Science, Graduate School, Daegu University
| | - Jung Won Kwon
- Department of Rehabilitation Science, Graduate School, Daegu University
| | - Yoon Tae Hwang
- Department of Physical Therapy, Gangneung Yeongdong College
| | - Min Kyu Park
- School of Mechanical and Automotive Engineering Technology, Yeungnam College of Science and Technology
| | - Chung Sun Kim
- Department of Physical Therapy, College of Rehabilitation Science, Daegu University
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Park EJ, Koh HK, Kwon JW, Suh MK, Kim H, Cho SI. Secular trends in adult male smoking from 1992 to 2006 in South Korea: age-specific changes with evolving tobacco-control policies. Public Health 2009; 123:657-64. [PMID: 19892378 DOI: 10.1016/j.puhe.2009.09.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2009] [Revised: 08/22/2009] [Accepted: 09/15/2009] [Indexed: 11/16/2022]
Abstract
OBJECTIVES For years, South Korea has had one of the highest levels of tobacco use among males in the world, but a steady decline has been observed recently. This study examined how the smoking behaviour of male adults changed with age after the implementation of national tobacco control policies in 1995. STUDY DESIGN Repeated cross-sectional study using a national survey. METHODS Data were obtained from the 1992, 1995, 1999, 2003 and 2006 results of a repeated cross-sectional survey, the Social Statistics Survey. The smoking status of adult men was compared before (1992 and 1995 surveys) and after (1999, 2003 and 2006 surveys) the implementation of government-directed tobacco control policies using graphical methods and logistic regression analysis. RESULTS After the implementation of tobacco control policies, the percentage of current male smokers decreased while the percentage of former smokers increased markedly. Smoking prevalence among older men (aged 50 years or more) reduced initially, and this decline was more pronounced after the tobacco control policies were implemented. Smoking prevalence in younger men (aged 30-49 years) declined in 2003 when more comprehensive tobacco control policies were implemented. CONCLUSIONS This study suggests that comprehensive tobacco control policies in South Korea reduced smoking prevalence among males, initially among older men and later among both older men and younger men.
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Affiliation(s)
- E J Park
- School of Public Health and Institute of Health and Environment, Seoul National University, Yeongun-dong, Jongno-gu, Seoul, 110-460, Republic of Korea
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Kwon JW, Yoon YC, Kim YN, Ahn JH, Choe BK. Which oblique plane is more helpful in diagnosing an anterior cruciate ligament tear? Clin Radiol 2008; 64:291-7. [PMID: 19185659 DOI: 10.1016/j.crad.2008.10.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2008] [Revised: 10/03/2008] [Accepted: 10/19/2008] [Indexed: 10/21/2022]
Abstract
AIM To evaluate the diagnostic role of additional oblique coronal and oblique sagittal magnetic resonance imaging (MRI) for an anterior cruciate ligament (ACL) tear. MATERIALS AND METHODS A total of 101 patients who had undergone preoperative knee MRI examinations with orthogonal and two sets of oblique images were enrolled in the study. Two radiologists evaluated the MRI images by the use of four methods: orthogonal images only (method A); orthogonal and additional oblique coronal images (method B); orthogonal and oblique sagittal images (method C); and orthogonal images with oblique coronal and sagittal images (method D). The status of the ACL (normal or tear) was determined by consensus. The sensitivity, specificity, and accuracy for an ACL tear with the use of each method were calculated in comparison with arthroscopy as the reference standard, and values were statistically analysed using the McNemar test. The diagnostic accuracies were compared using receiver operating characteristic (ROC) analysis. RESULTS Arthroscopy identified 10 partial ACL tears and 30 complete ACL tears. The specificities and accuracies for methods B, C, and D were significantly higher than the specificities and accuracies for method A (p<0.05). There was no significant difference in the sensitivity, specificity, and accuracy for methods B, C, and D. Diagnostic ability was not significantly different for each method, as determined by ROC analysis (p>0.05). CONCLUSIONS Additional oblique imaging for an ACL tear improved the specificity. Either of the oblique imaging methods is sufficient, and no further improvement in the diagnostic efficacy was achieved by simultaneous use.
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Affiliation(s)
- J W Kwon
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50, Ilwon-Dong, Kangnam-Ku, Seoul 135-710, Korea
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Yoo MK, Cho KY, Song HH, Choi YJ, Kwon JW, Kim MK, Lee JH, Wee WR, Cho CS. Release of Ciprofloxacin from Chondroitin 6-Sulfate-Graft-Poloxamer Hydrogel In Vitro for Ophthalmic Drug Delivery. Drug Dev Ind Pharm 2008; 31:455-63. [PMID: 16093211 DOI: 10.1080/03639040500214688] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The system was designed to use Poloxamer as a vehicle for ophthalmic drug delivery using in situ gel formation property. To enhance the wound healing and cell adhesion as well as transparency of Poloxamer hydrogel, chondroitin 6-sulfate (C6S) was introduced into Poloxamer. For this purpose, mono amine-terminated Poloxamer (MATP), which was end-capped with ethylene amine group only in one side of terminal hydroxyl groups of Poloxamer, was synthesized. Subsequently, C6S-graft-Poloxamer copolymer (C6S-g-Poloxamer) was prepared by reaction between the amine groups of MATP and carboxyl groups of C6S in the presence of 1-ethyl-3-(3-dimethylaminopropyl)-carboimide (EDC). The coupling of MATP with C6S was clarified by 1H-NMR and FT-IR spectroscopy. The gelation temperature of graft copolymers was determined by measuring the temperature at which immobility of the meniscus in each solution was first noted. Release behavior of ciprofloxacin from C6S-g-Poloxamer hydrogel in vitro was investigated as a function of C6S content in the graft copolymer by a spectrophotometric assay at 287 nm using an UV spectrophotometer. Differences in the adhesion and morphology of human lens cell between Poloxamer- and C6S-g-Poloxamer-coated surfaces were also investigated. The gelation temperatures of C6S-g-Poloxamer copolymers were lowered with increasing of the concentration of the copolymer and decreasing of C6S content. The release of ciprofloxacin from the graft copolymer was sustained compared with Poloxamer itself and decreased with increasing the content of C6S in the copolymer due to the in situ gel formation of the copolymer and viscous properties of C6S. Human lens cells (B3) adhered to C6S-g-Poloxamer-coated surface were observed as transformed shapes after 2 days. The bioadhesive and thermally gelling of these graft copolymers will be expected to be an excellent drug carrier for the prolonged delivery to surface of the eye.
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Affiliation(s)
- M K Yoo
- School of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
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Oh EY, Bae SK, Kwon JW, You M, Lee DC, Lee MG. Pharmacokinetic and pharmacodynamic consequences of inhibition of terazosin metabolism via CYP3A1 and/or 3A2 by DA-8159, an erectogenic, in rats. Br J Pharmacol 2007; 151:24-34. [PMID: 17351661 PMCID: PMC2012980 DOI: 10.1038/sj.bjp.0707192] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND PURPOSE Recently, orthostatic hypotension was observed in patients with benign prostatic hyperplasia who are taking vardenafil (a PDE 5 inhibitor) and terazosin (a long acting alpha blocker). Therefore, this study was performed with DA-8159 (a long acting PDE 5 inhibitor) and terazosin in rats to find whether or not pharmacokinetic and pharmacodynamic interactions between the two drugs were observed. EXPERIMENTAL APPROACH Pharmacokinetic and pharmacodynamic (changes in blood pressure) interactions between DA-8159 and terazosin were evaluated after simultaneous i.v. and p.o. administration of DA-8159 (30 mg kg(-1)) and terazosin (5 mg kg(-1)) to male Sprague-Dawley rats. KEY RESULTS After simultaneous i.v. and p.o. administration of terazosin and DA-8159, the total area under the plasma concentration-time curve from time zero to time infinity (AUC) of terazosin became significantly greater (57.4 and 75.4% increase for i.v. and p.o. administration, respectively) than those of without DA-8159. The blood pressure dropping effect was considerable after simultaneous p.o. administration of DA-8159 and terazosin compared with each drug alone. CONCLUSIONS AND IMPLICATIONS The significantly greater AUC of terazosin after both simultaneous i.v. and p.o. administration of both drugs could be due to the hepatic (both i.v. and p.o.) and intestinal (p.o.) inhibition of the metabolism of terazosin via CYP3A1 and/or 3A2 by DA-8159, since both DA-8159 and terazosin are metabolized via CYP3A1 and/or 3A2 in rats. The blood pressure lowering effect after simultaneous p.o. administration of both drugs could be due to significant increase in plasma concentrations of terazosin.
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Affiliation(s)
- E Y Oh
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University Kwanak-Gu, Seoul, South Korea
| | - S K Bae
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University Kwanak-Gu, Seoul, South Korea
| | - J W Kwon
- Research Laboratory, Dong-A Pharmaceutical Company, Ltd. Kyunggi-Do, South Korea
| | - M You
- Research Laboratory, Dong-A Pharmaceutical Company, Ltd. Kyunggi-Do, South Korea
| | - D C Lee
- Department of Family Medicine, Youngdong Severance Hospital, College of Medicine, Yonsei University Kangnam-Gu, Seoul, South Korea
| | - M G Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University Kwanak-Gu, Seoul, South Korea
- Author for correspondence:
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Kim HS, Park YH, Koo BC, Kwon JW, Lee JS, Choi HS. Evaluation of the photoneutron field produced in a medical linear accelerator. Radiat Prot Dosimetry 2007; 123:323-8. [PMID: 17077093 DOI: 10.1093/rpd/ncl162] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The doses and spectra of photoneutrons produced in a medical linear accelerator with photon energies of 10 and 15 MV were evaluated. The Monte Carlo code, MCNPX, was used to simulate the transport of these photoneutrons around the head for 10 and 15 MV photons. The fully-described geometry of the accelerator head was used in this calculation. The photoneutron energy spectra and doses for various photon field sizes were calculated at each of 20 positions. The results indicate that the maximum dose equivalents are observed in 20 x 20 cm(2) case among photon fields. It was found the neutron average energy at isocenter for a 0 x 0 cm(2) field is 0.38 MeV for 10 MV and is 0.45 MeV for 15 MV. The neutron doses at 10 positions around the head in the treatment room of the operation facility at 10 and 15 MV were measured using the bubble detectors. Measurements were compared with the calculations under the same geometry in the experiment. It was found that the majority of the calculated results agreed to within the standard deviations of the measurements. These above results can be applied in the verification of maximum allowed neutron leakage percentage of treatment dose defined in the IEC. We have been employing them to derive the empirical formula for neutron dose equivalent level at the maze entrance of medical accelerator treatment rooms in a study that is still underway.
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Affiliation(s)
- H S Kim
- Korea Institute of Nuclear Safety, 19 Guseong-dong, Yuseong-gu, Daejeon, Republic of Korea.
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Ahn GJ, Sohn YS, Kang KK, Ahn BO, Kwon JW, Kang SK, Lee BC, Hwang WS. Erratum: The effect of PDE5 inhibition on the erectile function in streptozotocin-induced diabetic rats. Int J Impot Res 2006. [DOI: 10.1038/sj.ijir.3901474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kim TJ, Kim IO, Kim WS, Cheon JE, Moon SG, Kwon JW, Seo JK, Yeon KM. MR imaging of the brain in Wilson disease of childhood: findings before and after treatment with clinical correlation. AJNR Am J Neuroradiol 2006; 27:1373-8. [PMID: 16775300 PMCID: PMC8133926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
BACKGROUND AND PURPOSE Although brain MR imaging findings in adult Wilson disease have been described in considerable detail, a paucity of information currently exists regarding brain MR imaging findings in pediatric Wilson disease. The purpose of this study was to analyze the brain MR imaging findings in Wilson disease of childhood at the initial stage and during follow-up after treatment and to correlate these observations with clinical response. METHODS We evaluated 50 patients with pediatric Wilson disease. Fifty initial and 20 follow-up MR images from 15 patients following penicillamine treatment were analyzed retrospectively, and the data were correlated with clinical findings. RESULTS Patients were categorized into 3 groups on the basis of initial MR imaging findings. Group I (n = 23) showed normal MR imaging findings. Group II (n = 15) was characterized by T1-weighted images with increased signal intensity in the globus pallidus (n = 15, 100%) followed by the putamen, midbrain, and caudate nucleus. Group III (n = 12) demonstrated T2-weighted images with increased signal intensity in the putamen (n = 10, 83%), followed by the caudate nucleus, globus pallidus, thalamus, midbrain, and pons. There was a significant difference in mean age, the presence of neurologic symptoms, and Child-Pugh classification among the 3 groups (P < .001). Following copper chelating therapy, the changes on follow-up MR imaging were strongly correlated with clinical response to treatment (P < .001). CONCLUSION Brain MR imaging in children with Wilson disease can be categorized into distinct groups and demonstrated a significant correlation with clinical findings. Interval changes on follow-up MR imaging were also closely correlated with clinical findings and helpful in assessing the clinical response.
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Affiliation(s)
- T J Kim
- Department of Radiology, College of Medicine, Seoul National University Bundang Hospital, #28 Yongon-dong, Chongno-gu, Seoul 110-744, Korea
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