2.A Preliminary Study for Illuminating Formal Ways of Pathological Language Behavior.
Hyung Won MIN ; Sung Ki HONG ; Seung Ah JUNG ; Jang Han LEE ; Byung Hwan YANG
Journal of Korean Neuropsychiatric Association 2001;40(4):569-580
OBJECTIVE: The purpose of this study was to identify differences in thinking between schizophrenic patients and healthy subjects with linguistic-philosophical approach and to develop a tool to measure pathological thinking. METHODS: Approximately 50 cards(pictures of either representational or abstract sculptures and paintings) from the previous experiment(1997) were carefully examined and 10 cards were selected based on their variety and promptness of the response. Twenty-four schizophrenic patients and 19 healthy subjects participated in this experiment. Participants were required to give a title to each picture. Their responses were analysed based on the forms of thinking, abstractness(or concreteness) and the category of the title. Each response was also coded either direct or indirect. RESULTS: 1) Schizophrenic patients emitted more direct and simple descriptive responses whereas healthy subjects showed projection-related direct traits, indirect traits, indirect association and generalization. 2) Both groups tended to utilize the whole rather than parts. Schizophrenic group depended more on the whole pictures than healthy group. Healthy subjects showed more generalization tendency with parts. 3) Both groups preferred concrete titles to abstract ones. Schizophrenic group(95.3%) used more concrete titles than healthy group(71.4%) and healthy group(28.65%) used more abstract titles than schizophrenic group(4.7%). 4) Schizophrenic patients(73.5%) showed more directness in thinking than healthy subjects, whereas healthy subjects(58.7%) more indirectness. CONCLUSIONS: 1) Schizophrenic patients clearly showed direct and simple forms of thinking and expressive language, lacking reasoning, and systematic processing. Additionally, schizophrenic patients simply responded to the whole and used concrete and direct expression. 2) Replication study is warranted to improve reliability and validity of the tool we developed. Research on individual differences needs to be conducted to measure differences among individuals and change over time in an individual. 3) Further study on the factors which might be related to forms of thinking and language expressions, such as intelligence is warranted.
Generalization (Psychology)
;
Humans
;
Individuality
;
Intelligence
;
Reproducibility of Results
;
Schizophrenia
;
Sculpture
;
Thinking
3.Unstable Repeat Expansion in Neurodegenerative Dementias: Mechanisms of Disease.
Hyun Duk YANG ; Dong Hwan HO ; Wongi SEOL
Dementia and Neurocognitive Disorders 2012;11(1):1-12
The majority of neurodegenerative dementias are thought to result primarily from the misfolding, aggregation and accumulation of proteins which interfere with protein homeostasis in the brain. Some of them are caused by the expansion of unstable nucleotide repeats, which include Huntington's disease as a prototype. Other neurodevelopmental or neurodegenerative disorders, such as fragile X syndrome, some spinocerebellar ataxias and myotonic dystrophies exhibit cognitive or behavioral deficits as parts of their clinical manifestations. Unstable repeat expansions include trinucleotide, tetranucleotide, and pentanucleotide. Recently hexanucleotide repeat expansion in frontotemporal dementia and amyotrophic lateral sclerosis was identified. The pathogenic mechanisms for these repeat disorders include either loss of protein function or gain of function at the protein or RNA levels. The aim of this article is to review proposed mechanisms by which unstable repeat expansions give rise to degeneration of brain with the hope of understanding the diseases and providing insights into the areas of therapeutic intervention. We will review these potential mechanisms in the context of fragile X syndrome, Huntington's disease, spinocerebellar ataxias, myotonic dystrophy, and frontotemporal dementia and amyotrophic lateral sclerosis. We will also discuss the potential targets for therapeutic intervention.
Amyotrophic Lateral Sclerosis
;
Brain
;
Dementia
;
Fragile X Syndrome
;
Frontotemporal Dementia
;
Homeostasis
;
Huntington Disease
;
Myotonic Dystrophy
;
Neurodegenerative Diseases
;
Proteins
;
RNA
;
Spinocerebellar Ataxias
4.Unstable Repeat Expansion in Neurodegenerative Dementias: Mechanisms of Disease.
Hyun Duk YANG ; Dong Hwan HO ; Wongi SEOL
Dementia and Neurocognitive Disorders 2012;11(1):1-12
The majority of neurodegenerative dementias are thought to result primarily from the misfolding, aggregation and accumulation of proteins which interfere with protein homeostasis in the brain. Some of them are caused by the expansion of unstable nucleotide repeats, which include Huntington's disease as a prototype. Other neurodevelopmental or neurodegenerative disorders, such as fragile X syndrome, some spinocerebellar ataxias and myotonic dystrophies exhibit cognitive or behavioral deficits as parts of their clinical manifestations. Unstable repeat expansions include trinucleotide, tetranucleotide, and pentanucleotide. Recently hexanucleotide repeat expansion in frontotemporal dementia and amyotrophic lateral sclerosis was identified. The pathogenic mechanisms for these repeat disorders include either loss of protein function or gain of function at the protein or RNA levels. The aim of this article is to review proposed mechanisms by which unstable repeat expansions give rise to degeneration of brain with the hope of understanding the diseases and providing insights into the areas of therapeutic intervention. We will review these potential mechanisms in the context of fragile X syndrome, Huntington's disease, spinocerebellar ataxias, myotonic dystrophy, and frontotemporal dementia and amyotrophic lateral sclerosis. We will also discuss the potential targets for therapeutic intervention.
Amyotrophic Lateral Sclerosis
;
Brain
;
Dementia
;
Fragile X Syndrome
;
Frontotemporal Dementia
;
Homeostasis
;
Huntington Disease
;
Myotonic Dystrophy
;
Neurodegenerative Diseases
;
Proteins
;
RNA
;
Spinocerebellar Ataxias
5.A case of peritoneal metastasis from gastric cancer successfully treated with docetaxel and cisplatin chemotherapy.
Jae Sook AHN ; Duk Hwan YANG ; Jeong Rae BYUN ; Yeo Kyeoung KIM ; Sang Hee CHO
Korean Journal of Medicine 2004;67(Suppl 3):S881-S886
In case of unresectable or metastatic gastric cancer, though many trials have been going, treatment results are poor yet. We report a patient with peritoneal metastasis from gastric cancer effectively treated with docetaxel and cisplatin chemotherapy. The patient was a 33 year-old man who was confirmed poorly differenciated adenocarcinoma of stomach 5 years ago. At the diagnosis, the stage of gastric cancer was T2N3M0. He underwent subtotal gastrectomy with Billoth II anastomosis and 6th cycles of postoperative adjuvant chemotherapy consisting of FAMTX. After that, there was no evidence of recurrence. Three years later, he was admitted to our hospital complaining of abdominal pain and distension. Abdominal CT revealed that recurred gastric cancer in anastomotic site with carcinomatous peritonei and multiple lymphadenopathy. He was performed chemotherapy combined with docetaxel (75 mg/m2) and cisplatin (75 mg/m2). After 3rd chemotherapy, follow up abdominal CT showed nearly complete regression of bowel loops, lymph node and ascites. After completion of 7th cycles of chemotherapy, it remained as complete response for recurred gastric cancer and he has no evidence of recurrence for over 2 years.
Abdominal Pain
;
Adenocarcinoma
;
Adult
;
Ascites
;
Chemotherapy, Adjuvant
;
Cisplatin*
;
Diagnosis
;
Drug Therapy*
;
Follow-Up Studies
;
Gastrectomy
;
Humans
;
Lymph Nodes
;
Lymphatic Diseases
;
Neoplasm Metastasis*
;
Peritoneal Neoplasms
;
Recurrence
;
Stomach
;
Stomach Neoplasms*
;
Tomography, X-Ray Computed
6.A Case of Acardiac Twin Diagnosed by Ultrasound Prenatally.
Yun Su HER ; Hwan Ju YANG ; Young Ju JEONG ; Sung Nam CHO ; Jong Duk KIM
Korean Journal of Obstetrics and Gynecology 2004;47(5):980-983
The acardiac twin, or twin reversal of arterial perfusion (TRAP) sequence is encountered in approximately 1% of monozygotic twins with an incidence of one in 35,000 births. The problem results from vascular anastomoses between the arterial and venous circulation of normal "pump" twin and that of recipient "perfused" acardiac twin. The recipient twin may display severe and lethal anomalies, including acardia and acephalus. The pump twin is structurally normal. Mortality of about 50-75% in cases without treatment is due to heart failure, prematurity or cord entanglement. We report a case of acardiac twin diagnosed by ultrasound prenatally.
Heart Failure
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Humans
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Incidence
;
Mortality
;
Parturition
;
Perfusion
;
Twins, Monozygotic
;
Ultrasonography*
7.Autogenous Bone Graft with Perpendicular Screw Fixation of the Medial Tibial Bone Defect in Total Knee Arthroplasty.
Churl Hong CHUN ; Ha Heon SONG ; Yeung Jin KIM ; Hwan Duk YANG
The Journal of the Korean Orthopaedic Association 2000;35(5):743-748
PURPOSE: We modified the Scuderi bone graft method for severely varus deformed patients, and then analyzed the clinical and radiological results and the changes of BMD at bone graft site. MATERIALS AND METHODS: Twenty-three total knee arthroplasties were performed in severely deformed varus knees. The proximal tibia was resected less than 10 mm thickness. In anteroposterior and tibial plateau view, defects was converted into a trapezoidal wedge shape for the self locking, and preserved anterior and posterior cortex. The defect was filled with an autogenous bone graft and fixed with two screws perpendicularly for early ambulation. RESULTS: The graft was completely united in 21 cases (90%) and the average of the union was 4 months postoperatively. The results were classified as excellent in 16 knees (70%) , good in 6 knees (26%) , and fair 1 knee (4%) using HSS knee rating scale. The average arc of motion was 115. and the tibio-femoral angle was 6.3. valgus. The BMD of bone graft site was checked 1.03 +/- 0.033 g/cm2 postoperatively and converted to 0.82 +/- 0.075 g/cm2 at follow-up 1 year. CONCLUSION: Modified autogenous bone graft could be preserved the subchondral bone essential for optimal thickness of cement and fixation of the tibial component.
Arthroplasty*
;
Early Ambulation
;
Follow-Up Studies
;
Humans
;
Knee*
;
Tibia
;
Transplants*
8.Facial nerve palsy following dental extraction: A case report
Moon Ki CHOI ; Sung Hwan OH ; Kyung Hwan KWON ; Chan Young YANG ; Young Duk JI ; Seo Wook KOH
Journal of the Korean Association of Maxillofacial Plastic and Reconstructive Surgeons 2003;25(5):452-460
Anesthesia
;
Cranial Nerves
;
Facial Nerve
;
Humans
;
Mandibular Nerve
;
Molar
;
Paralysis
10.Hepatic Zinc Concentration in Patients with Chronic Viral Hepatitis.
Jeong Yeol KIM ; Ji Hyun MOON ; Kyong Duk SUH ; Jae seung LEE ; Hyung Jun CHU ; Dae Hwan KANG ; Geun Am SONG ; Mong CHO ; Ung Suk YANG
The Korean Journal of Hepatology 2001;7(2):147-152
BACKGROUND AND AIMS: Zinc is an essential, mostly intracellular, trace element which participates in many oxidative or deoxidative reactions and in a protective action on liver cell activity. Plasma zinc levels are known to decrease in patients with liver disease including chronic viral hepatitis. The aim of this study was to reveal whether hepatic zinc concentrations have a correlation with grades of necroinflammation or stages of fibrosis in the patients with chronic viral hepatitis. METHODS: This study consisted of 50 subjects (43 chronic hepatitis B, 4 chronic hapatitis C, and 3 cirrhosis). Each specimen of liver tissue was classified with the grade of lobular inflammation, portal/periportal inflammation, and stage of fibrosis according to Scheuer's method. Hepatic zinc concentration was determined by ICP-Atomic Emission Spectrometry. RESULTS: The mean hepatic zinc concentration in the 50 chronic viral hepatitis patients was 233.66 g/g dry weight of liver tissue. The hepatic zinc levels were significantly correlated with the grades of portal/periportal inflammation (rs=-0.385, p=0.006), and grades of lobular inflammation(rs=-0.342, p=0.015). The stages of fibrosis were also negatively related (rs=-0.423, p=0.002). The zinc concentrations differed significantly among grades of lobular inflammation (p=0.013) and among stages of fibrosis (p=0.044). CONCLUSIONS: Hepatic zinc concentrations showed negative correlation with grades of portal/periportal inflammation, lobular inflammation, and stage of fibrosis in the patients of chronic viral hepatitis. These results suggest that decreased hepatic zinc concentration might be associated with severe hepatic injury and reflect decreased protective activity on liver cell injury.
Fibrosis
;
Hepatitis B, Chronic
;
Hepatitis*
;
Humans
;
Inflammation
;
Liver
;
Liver Diseases
;
Plasma
;
Spectrum Analysis
;
Zinc*