• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.6
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• pp.275-279
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• 2018

A brain abscess is caused by an infection in the central nervous system and leads to significant neurological sequelae. Despite advances in neurocritical care, high morbidity and mortality rates are still associated with brain abscess, especially in certain high-risk patients. Thus, a brain abscess is a medical emergency requiring prompt diagnosis and treatment with antibacterial therapy. However, the recurrence of brain abscess is rare. A 59-year-old man presented at our neurology clinic with a headache and was found to have chronic otitis media. Serial brain magnetic resonance imaging (MRI) scans of the patient demonstrated a brain abscess in the right frontal lobe. Following stereotactic aspiration of the brain abscess and proper antimicrobial treatment, the patient recovered completely. Five months after discharge, the patient revisited our clinic with a headache and seizure symptoms, and recurrence of the brain abscess was confirmed by brain MRI. Recurrent brain abscess has been documented in patients with predisposing conditions such as retained foreign bodies, chronic sinusitis, arteriovenous fistula, and right-to-left shunt.

• Science of Emotion and Sensibility
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• v.8 no.1
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• pp.55-61
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• 2005

The purpose of the study was to examine any difference in academic achievement, self-concept and achievement motivation by the types of hemispheric dominance. 189 high school students participated in the study. They were taken three kinds of different psychological tests i.e., the brain hemispheric preference (dominance), the self-concept and the achievement motivation tests. Three types of hemispheric dominance were classified as the left hemispheric, the right hemispheric and whole brain dominances. The results showed that students with the right hemispheric dominance showed lower academic achievement and self concept than the other groups students. Those who had left hemisphere dominance showed higher achievement motivation than the right hemispheric students. These results could be interpreted that education in the high school in Korea mainly focuses left hemisphere related topics or subjects.

• Journal of the Korean Data and Information Science Society
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• v.18 no.3
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• pp.721-733
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• 2007

The purpose of this research was to determine the effects of the functional lateralization of the brain variables related to the sex, the scientific attitude and the scientific exploration skills. The science instruction is divided in each type of the lecturing class with the experiment class. As for the degree of SMR brainwave activation in each stage are presented while accumulating the brain waves from the right, left and the whole brain waves are analyzed during the science learning activities. It is therefore reasonable to consider the science instruction types and brain lateralization to enhance the science learning effectiveness. Sensorimotor rhythm brainwave as the low Beta is represented well to show the thought process. Category quantification scores and objective scores are calculated to show the visual positioning map for the relationships of the categories by homogeneity analysis.

• Pediatric Infection and Vaccine
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• v.4 no.2
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• pp.276-281
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• 1997

A 13-year-old male with normal immunity presented with Aspergillus brain abscess manifestating as frontal headache and fever. $T_2$-weight magnetic resonance imaging revealed a hypointense lesion in the right fronto-temporo-parietal lobe 1cm thickness and left midline shifting. The hypointense appearance on $T_2$-weighted images appears to be characteristic of aspergillosis. Right decompressive craniectomy and removal of subdural empyema right. Abscess culture was Aspergillus fumigatus. Antibiotic treatment with Amphotericin B was given for 2 months postoperatively. No recurrence was identified during 5 month follow-up.

• Journal of Korean Neurosurgical Society
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• v.45 no.3
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• pp.176-178
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• 2009

Traumatic brainstem hemorrhage after blunt head injury is an uncommon event. The most frequent site of hemorrhage is the midline rostral brainstem. The prognosis of these patients is poor because of its critical location. We experienced a case of traumatic brainstem hemorrhage. A 41-year-old male was presented with drowsy mentality and right hemiparesis after blunt head injury. Plain skull radiographs and brain computerized tomography scans revealed a depressed skull fracture, epidural hematoma, and hemorrhagic contusion in the right parieto-occipital region. But, these findings did not explain the right hemiparesis. T2-weighted magnetic resonance (MR) image of the cervical spine demonstrated a focal hyperintense lesion in the left pontomedullary junction. Brain diffusion-weighted and FLAIR MR images showed a focal hyperintensity in the ventral pontomedullary lesion and it was more prominent in the left side. His mentality and weakness were progressively improved with conservative treatment. We should keep in mind the possibility of brainstem hemorrhage if supratentorial lesions or spinal cord lesions that caused neurological deficits in the head injured patients are unexplainable.

• Nuclear Medicine and Molecular Imaging
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• v.42 no.1
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• pp.17-28
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• 2008

Purpose: It was well known that cerebral blood perfusion is normal or diffusely decreased in the majority of patients with Parkinson's disease (PD). Actually we interpreted brain perfusion SPECT images of PD patients in the clinical situation, we observed various cerebral perfusion patterns in patients with PD. So we performed brain perfusion SPECT to know the brain perfusion patterns of PD patients and the difference of perfusion patterns according to the sex and the age. Also we classified PD patients into small groups based on the brain perfusion pattern. Methods and Materials: Two hundred nineteen patients (M: 70, F: 149, mean age: $62.9{\pm}6.9$ y/o) who were diagnosed as PD without dementia clinically and 55 patients (M:15, F:40, mean age: $61.4{\pm}9.2$ y/o) as normal controls who had no past illness history were performed $^{99m}Tc$-HMP AO brain perfusion SPECT and neuropsychological test. Results: At first, we compared all patients with PD and normal controls. Brain perfusion in left inferior frontal gyrus, left insula, left transverse temporal gyrus, left inferior parietal lobule, left superior parietal lobule, right precuneus, right caudate tail were lower in patients with PD than normal controls. Secondly, we compared male and female patients with PD and normal controls, respectively. Brain perfusion SPECT showed more decreased cerebral perfusion in left hemisphere than right side in both male and female patients compared to normal controls. And there was larger hypoperfusion area in female patients compared with male. Thirdly, we classified patients with PD and normal controls into 4 groups according to the age and compared brain perfusion respectively. In patient below fifties, brain perfusion in both occipitoparietal and left temporal lobe were lower in PD group. As the patients with PD grew older, hypoperfusion area were shown in both frontal, temporal and limbic lobes. Fourthly, We were able to divide patients into small groups based on cerebral perfusion pattern. There was normal cerebral blood perfusion in 32 (14.7%) of 219 patients with PD, decreased perfusion on the frontal lobe in 45 patients (20.6%), the temporal lobe in 39 patients (17.4%), the parietal lobe in 39 patients (17.9%), the occipital lobe in 40 patients (18.3%), diffuse area in 14 patients (6.4%) and unclassified in 10 patients (4.6%). Fifthly, we compared the results of the neuropsychological test and cerebral perfusion pattern. There was no correlation between two tests except visuospatial function. Conclusion: Various perfusion state were found in patients with PD according to the age and sex. Also we were able to classify perfusion state into several groups and compare the neuropsychological test with cerebral perfusion.

• Journal of Korea Game Society
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• v.15 no.2
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• pp.123-130
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• 2015

In this paper, we present the research result related to a game application system which improves the symmetry of the left and right brain activity for alleviating the emotional disorders such as anxiety and depression. Since the characteristics of patients with affective disorders are less willing to therapy. obvious motivation is needed in general. To provide a strong incentive for these patients, we propose a customized game system through game-oriented content of enjoyment. After the experiments conducted for 5 days, it was found that the symmetry of left and right brain activity is enhanced. The proposed functional game system can be applied to a wide range of applications such as healthcare or education.

• Journal of the Korean Data and Information Science Society
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• v.20 no.3
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• pp.541-550
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• 2009

This research attempted to find out any implications for strategies to design and develop the connections between the activities of the brain function and the fields of English learning (dictation, word level, speaking, word memory, listening). Thus, in developing the brain based learning model for the English education, attempts need to be made to help learners to keep the whole brain toward learning. On this point, this study indicated the significant results for the exclusive brain location and the brainwaves on the each English learning field by the quantitative EEG analysis. The results of this study presented the guidelines for the balanced development of the left brain and the right brain to train the specific site of the brain connected to the English learning fields. In addition, whole brain training model is developed by the quantitative EEG data not by the theoretical learning methods focused on the right brain training.

• Korean Journal of Biological Psychiatry
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• v.4 no.1
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• pp.74-83
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• 1997

With increasing tendency of incidence and interest for the late onset schzophrenia, concerns about whether this disorder is etiologically or phenomenogically distinctive entity or not have increased also. To clarify the disease entity of the late onset schzophrenia and the role of structural brain changes in its etiology, authors tried to prove following hypothesis : Are there any evidences of structural brain changes in the lateonset schizophrenia? ; If present, are they not different from those of the early-onset schizophrenia or progressive schizophrenia? ; And are they not different from those of senile dementia? Subjects were 6 patients with the late-onset schizophrenia, 6 patients with the early-onset schizophrenia, 6 patients with progressive schizophrenia, 6 patients with Alzheimer's dementia, and 6 controls. We measured regions of interest of the magnetic resonance images by computer assisted planimetry using the AutoCad and digitizer. Our study results may suggest that the third ventricular enlargement and a reversal of normal difference between left and right temporal lobe and left-right difference in posterior lateral ventricle are common brain pathology for all types of schizophrenia including the late onset schzophrenia. And also suggest that brain structural changes of the late onset schizophrenia are related with neurodevelopmental abnormality rather than degenerative change.

• Journal of the Korean Institute of Intelligent Systems
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• v.18 no.5
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• pp.605-610
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• 2008

There are many methods for Human-Computer Interface. Recently, many researchers are studying about Brain-Signal this is because not only the disabled can use a computer by their thought without their limbs but also it is convenient to general people. But, studies about it are early stages. This paper proposes an EEG signals measurement and analysis methods for Brain-Computer Interface. Our purpose of this research is recognition of subject's intention when they imagine moving their arms. EEG signals are recorded during imaginary movement of subject's arms at electrode positions Fp1, Fp2, C3, C4. We made an analysis ERS(Event-Related Synchronization) and ERD(Event-Related Desynchronization) which are detected when people move their limbs in the ${\mu}$ waves and ${\beta}$ waves. Results of this research showed that ${\mu}$ waves are decreased and ${\beta}$ waves are increased at left brain during the imaginary movement of right hand. In contrast, ${\mu}$ waves are decreased and ${\beta}$ waves are increased at right brain during the imaginary movement of left hand.