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각성 중 주기성사지운동 여부에 따른 하지불안증후군 환자의 수면 특성 차이에 대한 비교연구
신유용,변정익,신원철 대한수면연구학회 2018 Journal of sleep medicine Vol.15 No.2
Restless leg syndrome (RLS) is a common sensorimotor disorder and is frequently associated with periodic limb movement in sleep (PLMS). Also about one third of patient with RLS have periodic limb movement during wakefulness (PLMW). However there is little research on the correlation between PLMW and RLS. We aimed to evaluate difference in sleep characteristics between patients with RLS with PLMW and those without PLMW. Methods: Our study included twenty eight RLS patients. Subjects underwent suggested immobilization test (SIT) prior to one full-night polysomnography study. Patients were classified into two groups according to the presence of PLMW based on SIT-PLMW index. Polysomnographic findings, subjective sleep quality, and hematologic results were analyzed and compared between the two groups. Results: Mean age of patient with frequent PLMW (SIT-PLMW ≥40/hr) was significantly higher. RLS patients with frequent PLMW were also significantly related to insomnia severity. The PLMS index was higher in patients with PLMW and showed a significant correlation with the PLMW index. Conclusions: PLMW influence sleep quality such as insomnia and is correlated with movement during sleep.
저용량과 고용량 현미쌀눈 유래 GABA가 수면시간과 질에 미치는 영향에 대한 무작위 이중 눈가림법 위약 처치시행 연구
신유용,변정익,정승은,성민지,조한아,차현극,신원철 대한수면연구학회 2016 Journal of sleep medicine Vol.13 No.2
Gamma-aminobutyric acid (GABA) has potential benefits in counteracting the sleep disruption and potential therapeutic effects on blood pressure, stress, cancer, and inflammatory diseases. Recently, High-dose GABA can be extracted from fermented rice germ using lactic acid bacteria. This study aimed to evaluate the effects of GABA natural extracts from fermented rice-germ on sleep latency, subjective sleep quality and insomnia symptoms. Methods: This was a prospective randomized double-blind placebo-controlled trial performed at Kyung-Hee University hospital at Gangdong from June 2013 to October 2013. Adult (age≥30) patients who was diagnosed of insomnia according to DSM-IV criteria was enrolled. They were randomized into three groups: high dose treatment group 300 mg; low-dose treatment group, 100 mg; and placebo group. Questionnaires including Insomnia Severity Index (ISI), Pittsburgh Sleep Quality Index (PSQI), WHO-5 Well-Being Index were performed, and 1-week actigraphy was recorded before and 1 week after the treatment. Results: Total of 114 patients were randomized into 3 groups: high-dose treatment (n=37), low-dose treatment (n=38), and placebo treatment group (n=39). At 1 week after the treatment, PSQI total score and C2 (sleep latency) score significantly decreased in low-dose and high-dose treatment group than the placebo groups [Repeated measures analysis of variance (ANOVA), p=0.017, 0.004 respectively]. ISI score also decreased in the two groups in dose-dependent manner (Repeated measures ANOVA, p=0.037). There were five (4.4%) patients who reported medication adverse events. Conclusions: This study suggests that treatment of low and high-dose GABA from unpolished rice-germ decreases sleep latency and improve insomnia severity without severe adverse events.
김정수,신유용,김상범 대한근전도전기진단의학회 2019 대한근전도 전기진단의학회지 Vol.21 No.1
High-resolution ultrasonography (HRUS) is a diagnostic tool that is increasingly used in the work-up of peripheral nerve disease. As many peripheral nerves run a superficial course, they can be studied over a long tract, especially in the arms. This is a big advantage over magnetic resonance imaging (MRI) when multiple nerves have to be studied, as MRI is relatively expensive, time consuming and not readily available everywhere. Furthermore, different aspects of nerve morphology can be studied with HRUS. Nerve cross-sectional area (CSA) can be determined at multiple sites along the nerve. CSA can be measured at entrapment sites (e.g. the carpal tunnel, cubital tunnel, Guyon’s canal and the fibular head), but also at non-entrapment sites. Apart from nerve CSA, vascularization, echogenicity, fascicular pattern and endoneurial thickness can be investigated as well. All those modalities can give critical insight in the origin and development of various peripheral neuropathies.
변정익,신유용,정성은,신원철 대한신경과학회 2018 Journal of Clinical Neurology Vol.14 No.3
Background and Purpose This study aimed to determine the subjective and objective improvements in sleep quality after treatment with gamma-aminobutyric acid (GABA; 300 mg daily) extracted from unpolished rice germ. Methods This study was a prospective, randomized, double-blind, and placebo-controlled trial. In total, 40 patients who complained of insomnia symptoms were enrolled and randomly assigned to the GABA treatment group (n=30) or the placebo group (n=10). Polysomnography was performed, and sleep questionnaires were administered before treatment and after 4 weeks of treatment. Results After 4 weeks of treatment the sleep latency had decreased [13.4±15.7 min at pretreatment vs. 5.7±6.2 min at posttreatment (mean±SD), p=0.001] and the sleep efficacy had increased (79.4±12.9% vs. 86.1±10.5%, p=0.018) only in the GABA treatment group. Adverse events occurred in four subjects (10%). Conclusions This study shows that treatment with unpolished-rice-germ-derived GABA improved not only the subjective sleep quality but also the objective sleep efficacy without severe adverse events.
이학영,김정수,신유용 대한신경과학회 2019 대한신경과학회지 Vol.37 No.1
We describe a case of vertebral artery dissection (VAD) presenting with acute infarctions in cervical spinal cord and cerebellum in a 78-year-old man. Diffusion-weighted magnetic resonance (MR) imaging of the brain demonstrated diffusion-restricted lesions in the right cerebellum and sagittal T2-weighted MR imaging of spinal cord showed a hyperintense lesion of the cervical spinal cord at C2-C4 level. Right VAD was identified by transfemoral cerebral angiography and computed tomography angiography which showed segmental occlusion in the right vertebral artery.
Miller-Fisher증후군과 동반된 양쪽 거짓-신경핵사이 눈근육마비
하상희,윤태환,신유용,이은재,김범준 대한신경과학회 2018 대한신경과학회지 Vol.36 No.2
Bilateral internuclear ophthalmoplegia (INO) refers to a specific gaze abnormality of bilateral adduction deficits, often accompanied by dissociated abducting nystagmus, caused by medial longitudinal fasciculus lesions usually due to multiple sclerosis or stroke. We report a 63-year-old man with clinical features of Miller-Fisher syndrome (MFS), consisting of ataxia, areflexia, and external ophthalmoplegia which mimicked bilateral-INO without an identifiable central lesion. Although bilateral adduction deficits are usually caused by central lesions, peripheral nervous damage by MFS is needed to be considered.
송종민,권영남,나부석,송수진,신유용,이재홍,이도경,안태범 대한신경과학회 2016 대한신경과학회지 Vol.34 No.4
A 65-year-old female visited us due to gait disturbance. A neurological examination showed cognitive impairment, dystonia, myoclonus, bradykinesia, postural instability, and freezing of gait (FOG). She was diagnosed with extrapontine myelinolysis based on her history of hyponatremia and high signal intensities (HSIs) in both striata on T2-weighted images. Her neurological problems including FOG improved over 25 days. In a follow-up MRI 50 days after the onset, HSIs disappeared in the striata but new ones appeared in the pons. FOG may have been related to striatal dysfunction in this patient.