• Korean Journal of Plant Resources
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• v.16 no.1
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• pp.89-98
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• 2003

Pollens of six taxa in the genus Atractytis L. confused with Atractylodes DC. were investigated by the light and the scanning electron microscope. Pollen grains of six taxa in this genus were monads, 46.5-66.7$\mu\textrm{m}$ in length of polar axis, 43.6-60.47$\mu\textrm{m}$ in equatorial width. Aperture was tri-colporate, 19.6-29.1 $\mu\textrm{m}$ in colpus length,7.3-11.0$\mu\textrm{m}$ in colpus width and 6.4-10.6$\mu\textrm{m}$ in porus diameter. The exine was composed of three layers(foot layer, columellne, tectum), and 5.2-8.3 $\mu\textrm{m}$ in thickness. The surface sculpturing pattern was echinate, the spines were 1.4-5.8$\mu\textrm{m}$ in length and 6-33 per 20$\mu\textrm{m}$$^2$ in distribution numbers over the surface. Atractylis L. was not distinguished from Atractylodes DC. by pollen morphology, especially the pollens of Atractylis arabica, A. aristata, A. carduus, A. microcephala were very similar to that of Atractylodes. But its taxonomic significance was different, the taxa of Atractylodes DC. were divided into 2 types by only pollen size, but the treated taxa in this study were divided into various types by pollen size, shape of equatorial view, surface sculpturing and spine size. The characteristics of spine size and shape of equatorial view in A. cancellata and A. prolifera were very useful for consideration of evolutionary trends in this genus.

• Journal of Life Science
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• v.15 no.4 s.71
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• pp.600-606
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• 2005

Neurofilament (NF) proteins constitute the major intermediate filament type in adult neurons. They are made up by the copolymerization of the neurofilament light (NF-L, 61 kDa), medium (NF-M, 90kDa), and heavy (NF-H, 115 kDa) proteins. Although neurofilaments play a crucial .ole in neuronal growth, organization, shape, and plasticity, their expression pattern and cellular distribution in the developing neurons remain unknown. In this study, we have produced a rabbit polyclonal antibody specific to NF-M and investigated expression of NF-M in cultured cortical neurons. Immunostaining of 12 and 24 h cultures revealed strong expression of NF-M in axonal growth cone and in the region of a soma toward the axon. Doublestaining of 4 and 14 DIV corical neurons with NF-M and PSD95 antibodies revealed that both axon and dendrites were stained intensely with NF-M antibody, and that NF-M immunostaining along dendrites is often punctate and colocalize with PSD95 puncta, indicating that the puncta represent postsynaptic spines. Presence of NF-M in the postsynaptic spine was also indicated by immunoblot analysis of the postsynaptic density fraction. Taken together, our results show intensive targeting of NF-M into axons in the early axonal development, and into spines in mature neurons, indicating its important functions in axon and spine development.

• Journal of the Korean Society of Radiology
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• v.14 no.7
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• pp.899-906
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• 2020

The WSS lateral examination is important for diagnosing spinal disorders. Recently, long-length detectors for large-area diagnose have been popularized to effectively reduce the exposure dose and examination time. It can be applied very efficiently to examinations of patients with high risk of falls, children, and adolescents. However, since the image is acquired through a single irradiation, the volume of cervical vertebra is relatively smaller than the lumbar due to the geometrical anatomy of the spine. Therefore, this study intends to fabricate an additional filter using 3D printing technology and copper filament to obtain uniform image quality in the WSS lateral examination and to analyze the results. 3D printing technology is able to easily print a desired shape, so it is widely used in the entire industrial field, and recently, a copper filament has been developed to confirm the possibility as an additional filter. In the WSS lateral examination, CNR and SNR were excellently measured when the additional filter was applied, confirming the possibility of using the additional filter.

• Science of Emotion and Sensibility
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• v.24 no.2
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• pp.81-92
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• 2021

In this study, we investigated the effects of five EMS lumbar back pressure belts produced on an anatomical basis on lumbar spine stabilization. Five core muscles were selected, including the urinal, vertebral column, endotracheal, external abdominal, and large back muscles, and patterns were designed using a conductive fabric considering the appropriate muscle shape and pain-causing points. We experimented with four motions to examine the effects of different EMS abdominal compression belts on lumbar spine stabilization. Five healthy men in their 20s were selected. The selection conditions include no back pain history for the past three months, no restricted movements through pre-inspection, and the muscular strength of the body should belong to the normal grade. Using SLR, the sequence of experimental actions was chosen from the following but not limited to left-hand, body-hand, and back-line forces. Resting between movements lasted for 2 min, and the experiments were conducted after wearing the EMS abdominal pressure belt. Electrical stimulation was applied for 10 min to increase blood flow and muscle activation. The statistics of the experimental results were analyzed for specific differences by conducting the Wilcoxon and Friedman tests with nonparametric tests. The ranking results of each pattern were successfully assessed in the order of 5, 4, 3, 1, 2 for the five patterns, and we could identify slightly more significant results for experimental behavior associated with each muscle movement. Patterns produced based on anatomy showed differentiated effects when electric stimulation was applied to each muscle in different shapes, which could improve the stabilization of the lumbar spine in everyday life or training to the public. Based on these results, subsequent research would focus on developing smart healthcare clothing that is practical in daily life by employing different anatomical mechanisms, depending on the back pain, to utilize trunk-type tights.

• KIPS Transactions on Software and Data Engineering
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• v.12 no.1
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• pp.51-58
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• 2023

In this paper, we propose an organ segmentation technique for the automatic extraction of medical diagnostic indicators from X-ray images. In order to calculate diagnostic indicators of heart disease and spinal disease such as VHS(vertebral heart scale) and Cobb angle, it is necessary to accurately segment the thoracic spine, carina, and heart in a chest X-ray image. A deep neural network model in which the high-resolution representation of the image for each layer and the structure converted into a low-resolution feature map are connected in parallel was adopted. This structure enables the relative position information in the image to be effectively reflected in the segmentation process. It is shown that learning performance can be improved by combining the OCR module, in which pixel information and object information are mutually interacted in a multi-step process, and the channel attention module, which allows each channel of the network to be reflected as different weight values. In addition, a method of augmenting learning data is presented in order to provide robust performance against changes in the position, shape, and size of the subject in the X-ray image. The effectiveness of the proposed theory was evaluated through an experiment using 145 human chest X-ray images and 118 animal X-ray images.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.30 no.4
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• pp.562-573
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• 1997

Comparative osteology of Chromis notata, C. analis and C. fumea was studied based on the samples collected from the Korean waters. The three species are distinguished by the shape of cranium, visceral skeleton, vertebra and caudal skeleton. Chromis notata has a glossohyal which is slightly curved in shape while two other species are deeply curved. C. analis has three spiniform procurrent caudal rays while others have two. C. fumes could be distinguished easily by the shape of preopercle which is serrate in posterior margin. This investigator reveals following bones as new taxonomic criteria for the genus Chromis in Korea. In cranium, height of supraoccipital, height of process of parasphenoid and anterior margin of basisphenoid, in visceral skeleton, presence of fine papilla-like process at the surface of preopercular sensory canal, in orbital bone, width of preorbital, in hyoid arch, shape of glossohyal, union state between lower hypohyal and ceratohyal and union state between ceratohyal and epihyal, in shoulder girdle bone, dorsal margin of posttemporal, width of upper postclavicle, posterior end of lower postclavicle and posterior margin of first actinost bone, in vertebrae, beginning point of parapophysis, in caudal skeleton, upper shape of second neural spine of pleural centrum.

• Journal of Korean Medicine Rehabilitation
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• v.23 no.4
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• pp.169-176
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• 2013

Objectives To investigate correlation between anthropometric data (neck circumference (NC), waist circumference (WC), body mass index (BMI), and body shape indexes) and radiological parameters of lumbosacrum. Methods The data of college students living in Seoul (n=24) were analyzed retrospectively. Anthropometric data of NC, WC, and BMI were measured. Lumbar spine X-ray film was taken to measure lumbar lordotic angle, Ferguson's angle. To evaluate body shape of participants, three indexes of neck-to-waist ratio (NWR), neck-to-height ratio (NHR), and waist-to-height ratio (WHR) were used. Anthropometric data's correlations with radiological parameters of lumbosacrum were investigated. Results Anthropometric data of NC, WC, and BMI had no significant correlation with radiological parameters of lumbosacrum. NWR had significant positive correlation with lumbar lordotic angle and Ferguson's angle. NHR and WHR had no significant correlation with radiological parameters of lumbosacrum. Conclusions The results suggest that NWR-related fat distribution in neck has significant correlation with radiological parameters of lumbosacrum regardless of obesity.

• The Journal of Korean Institute of Next Generation Computing
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• v.15 no.4
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• pp.40-50
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• 2019

In recent years, it is important to visualize an accurate human body model for the low-end system in the medical imaging field where augmented reality technology and virtual reality technology are used. Decreasing the geometry of a model causes a difference from the original shape and considers the difference as an error. So, the error should be minimized while reducing geometry. In this study, the organ areas of a human body in the tomographic images such as CT or MRI is segmented and 3D geometric model is generated, thereby implementing the reconstruction method of multiple resolution level-of-detail model. In the experiment, a virtual reality platform was constructed to verify the shape of the reconstructed model, targeting the spine area. The 3D human body model and patient information can be verified using the virtual reality platform.

• Applied Microscopy
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• v.8 no.1
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• pp.53-66
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• 1978

An attempt has been made to discriminate the synapses in the striatum consisting caudate nucleus, putamen and fundus striati of the cat with emphasis on the characteristic structures of axon terminals and postsynaptic profiles. The differentiation is based on the size and shape of vesicle in the bouton terminal, and the symmetrical or asymmetrical thickening the pre- and postsynaptic membrane. Four types of synapses could be differentiated: Type I: the bontons with asymmetrical,synaptic thickenings contain round 45 nm diameter vesicles and contact cell soma, dendritic shafts and dendritic spines (74%). Type II : the boutons contain round 45nm diameter vesicles and are associated with symmetrical membrane thickenings. These synapses are formed on the soma and dendritic shafts (6%). Type III: the boutons with symmetrical membrane thickenings contain 50-60 nm diameter pleomorphic vesicles, and contact soma and dendritic shafts (18%). Type IV: the terminals contain flattened vesicles ($25{\times}45 nm$) and are associated with symmetrical membrane thickenings. These synapses are found in contact with soma and dendritic shafts. Additionally, the bouton en passant, which is expanded from myelinated or unmyelinated axons containing round vesicles (45nm diameter) contacts the dendritic shaft or dendritic spine with asymmetrical membrane thickenings. Two unusual types of synapses, axo-axonic and dendro-dendritic, are found occasionally.

• Journal of Korean Neurosurgical Society
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• v.50 no.3
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• pp.264-267
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• 2011

A 50-year-old man presented bilateral hypesthesia on and below the T6 dermatome and paresthesia. Magnetic resonance imaging (MRI) showed an intraspinal extradural tumor, which located from the 6th thoracic vertebral body to the upper margin of the 7th vertebral body, continuing dumbbell-like through the intervertebral foramen into the right middle thorax suggesting a neurogenic tumor (neurofibroma or neurilemmoma). With the patient in a prone position, we exposed and excised the tumor via a one stage posterior approach through a hemi-laminictomy of T6. Histologic examination showed a grade 1 meningothelial meningioma, according to the World Health Organization classification. Initially, we assumed the mass was a schwannoma because of its location and dumbbell shape. However, the tumor was actually a meningioma. Postoperatively, hypesthesia resolved completely and motor power of the leg gradually full recovered. A postoperative MRI revealed no evidence of residual tumor.