Abstract：
OBJECTIVE:To investigate the effects of posterior implant rigidity on spinal kinematics at adjacent levels by utilizing a cadaveric spine model with simulated physiological loading. METHODS:Five human lumbar spinal specimens (L3 to S1) were obtained and checked for abnormalities. The fresh specimens were stripped of muscle tissue, with care taken to preserve the spinal ligaments and facet joints. Pedicle screws were implanted in the L4 and L5 vertebrae of each specimen. Specimens were tested under 0 N and 400 N axial loading. Five different posterior rods of various elastic moduli (intact, rubber, low-density polyethylene, aluminum, and titanium) were tested. Segmental range of motion (ROM), center of rotation (COR) and intervertebral disc pressure were investigated. RESULTS:As the rigidity of the posterior rods increased, both the segmental ROM and disc pressure at L4-5 decreased, while those values increased at adjacent levels. Implant stiffness saturation was evident, as the ROM and disc pressure were only marginally increased beyond an implant stiffness of aluminum. Since the disc pressures of adjacent levels were increased by the axial loading, it was shown that the rigidity of the implants influenced the load sharing between the implant and the spinal column. The segmental CORs at the adjacent disc levels translated anteriorly and inferiorly as rigidity of the device increased. CONCLUSION:These biomechanical findings indicate that the rigidity of the dynamic stabilization implant and physiological loading play significant roles on spinal kinematics at adjacent disc levels, and will aid in further device development.
journal_name
J Korean Neurosurg Socjournal_title
Journal of Korean Neurosurgical Societyauthors
Chun K,Yang I,Kim N,Cho Ddoi
10.3340/jkns.2015.58.5.412subject
Has Abstractpub_date
2015-11-01 00:00:00pages
412-8issue
5eissn
2005-3711issn
1598-7876journal_volume
58pub_type
杂志文章abstract：Objective:Morphometric data for the lumbar posterior longitudinal ligament (PLL) was investigated to identify whether there is a difference in the morphometry of the PLL of the lumbar spine at each level with respect to the pattern of intervertebral disc displacement. Methods:In 14 formalin-fixed adult cadavers (12 ma...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2017.0257
更新日期：2018-01-01 00:00:00
abstract：OBJECTIVE:Because the anatomical structure of the brachial plexus is very complex, surgical treatment of tumors in this region is challenging. Therefore, a lot of clinical and surgical experience is required for successful treatment; however, many neurosurgeons have difficulty accumulating this experience owing to the ...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2018.0045
更新日期：2018-09-01 00:00:00
abstract：OBJECTIVE:We investigated the clinical and radiological advantages of unilateral laminectomy in posterior lumbar interbody fusion (PLIF) procedure comparing with bilateral laminectomy, under the same procedural condition including bilateral instrumentation and insertion of two cages, in patients with degenerative lumba...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2011.50.4.363
更新日期：2011-10-01 00:00:00
abstract：:Congenital anomalies in arches of the atlas are rare, and are usually discovered incidentally. However, a very rare subgroup of patients with unique radiographic features is predisposed to transient quadriparesis after minor cervical or head trauma. A 46-year-old male presented with a 2-month history of tremor and hyp...
journal_title：Journal of Korean Neurosurgical Society
pub_type：
doi：10.3340/jkns.2011.49.3.178
更新日期：2011-03-01 00:00:00
abstract：:A true collision tumor is a rare entity composed of two histologically distinct neoplasms coinciding in the same organ. This paper reports a unique case of cerebral collision tumor consisting of two benign components. On the first hand, meningioma which is usually a benign lesion arising from the meningothelial cell i...
journal_title：Journal of Korean Neurosurgical Society
pub_type：
doi：10.3340/jkns.2015.0707.011
更新日期：2017-01-01 00:00:00
abstract：OBJECTIVE:To examine the synergistic effects of both computer-assisted cognitive rehabilitation (CACR) and transcranial direct current stimulation (tDCS) on cognitive function in patients with stroke. METHODS:The current double-blind, sham-controlled study enrolled a total of 11 patients who were newly diagnosed with ...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2013.54.6.484
更新日期：2013-12-01 00:00:00
abstract：OBJECTIVE:The present study aims to investigate 1) the risk factors for hydrocephalus and subdural hygroma (SDG) occurring after decompressive craniectomy (DC), and 2) the association between the type of SDG and hydrocephalus. METHODS:We retrospectively reviewed the clinical and radiological features of 92 patients wh...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2015.58.3.254
更新日期：2015-09-01 00:00:00
abstract：: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 dr...
journal_title：Journal of Korean Neurosurgical Society
pub_type：
doi：10.3340/jkns.2009.45.3.176
更新日期：2009-03-01 00:00:00
abstract：:A 65-year-old male presented with pain in his right medial calf. An imaging study revealed no acute lesions, and a diagnosis of saphenous neuralgia was made by a nerve conduction study. He received temporary pain relief with saphenous nerve blocks twice in a one-week interval. Pulsed radiofrequency neuromodulation red...
journal_title：Journal of Korean Neurosurgical Society
pub_type：
doi：10.3340/jkns.2013.54.2.136
更新日期：2013-08-01 00:00:00
abstract：OBJECTIVE:Brainstem metastases are rarely operable and generally unresponsive to conventional radiation therapy or chemotherapy. Recently, Gamma Knife Radiosurgery (GKRS) was used as feasible treatment option for brainstem metastasis. The present study evaluated our experience of brainstem metastasis which was treated ...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2011.50.4.299
更新日期：2011-10-01 00:00:00
abstract：OBJECTIVE:To report a minimally invasive treatment option using percutaneous pedicle screw fixation with adjuvant treatment for metastatic thoraco-lumbar and lumbar spinal tumors. METHODS:This is a retrospective study of charts of patients with spinal metastases. All were older than 18 years of age and were considered...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2015.57.2.100
更新日期：2015-02-01 00:00:00
abstract：OBJECTIVE:The diagnosis of insufficiency fractures of the sacrum in an elder population increases annually. Fractures show very different morphology. We aimed to classify sacral insufficiency fractures according to the position of cortical break and possible need for intervention. METHODS:Between January 1, 2008 and D...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2017.0188
更新日期：2018-03-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to evaluate the different patterns of bone loss between the lumbar spine and the femur after ovariectomy in rats. METHODS:Twenty-four female Sprague-Dawley rats underwent a sham operation (the sham group) or bilateral ovariectomy (the ovariectomized group). Four and eight weeks ...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2012.52.1.1
更新日期：2012-07-01 00:00:00
abstract：:Ehlers-Danlos syndrome (EDS) type IV is characterized by its clinical manifestations, which are easy bruising, thin skin with visible veins, and rupture of arteries, uterus, or intestines. Arterial complications are the leading cause of death in vascular EDS because they are unpredictable and surgical repair is diffic...
journal_title：Journal of Korean Neurosurgical Society
pub_type：
doi：10.3340/jkns.2010.48.6.528
更新日期：2010-12-01 00:00:00
abstract：:Pleomorphic xanthoastrocytoma (PXA) has been considered as a low grade tumor of adolescents and young adults. Although this tumor often shows cystic component, the hemorrhage within the cyst is extremely rare. The authors report a rare case of cystic PXA with a hemorrhage within the cyst and the mural nodule in the le...
journal_title：Journal of Korean Neurosurgical Society
pub_type：
doi：10.3340/jkns.2007.42.5.410
更新日期：2007-11-01 00:00:00
abstract：OBJECTIVE:Surgical obliteration of ruptured aneurysm of the proximal posterior inferior cerebellar artery (PICA) is challenging because of limited surgical accessibility. In recent years, coil embolization is the first-choice treatment for these lesions. However, coil embolization is not always easy in ruptured PICA an...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2017.0229
更新日期：2018-09-01 00:00:00
abstract：Objective:Electrooculography (EOG) records eyeball movements as changes in the potential difference between the negatively charged retina and the positively charged cornea. We aimed to investigate whether reliable EOG waveforms can be evoked by electrical stimulation of the oculomotor and abducens nerves during skull b...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2020.0179
更新日期：2020-12-23 00:00:00
abstract：:[This corrects the article on p. 338 in vol. 47, PMID: 20539792.]. ...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章,已发布勘误
doi：10.3340/jkns.2010.47.6.480
更新日期：2010-06-01 00:00:00
abstract：:We report a rare case of Williams syndrome accompanying moyamoya disease in whom postoperative global cerebral infarction occurred unpredictably. Williams syndrome is an uncommon hereditary disorder associated with the connective tissue abnormalities and cardiovascular disease. To our knowledge, our case report is the...
journal_title：Journal of Korean Neurosurgical Society
pub_type：
doi：10.3340/jkns.2011.50.3.256
更新日期：2011-09-01 00:00:00
abstract：OBJECTIVE:The objectives of this study were to determine the frequency of symptomatic postdiscectomy pseudocyst (PP) after endoscopic discectomy and to compare the results of surgical and conservative management of them. METHODS:Initial study participants were 1,503 cases (1,406 patients) receiving endoscopic lumbar d...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2011.49.1.31
更新日期：2011-01-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to determine the optimal volume of injected cement and its distribution when used to treat vertebral compression fractures, and to identify factors related to subsequent vertebral fractures. METHODS:A retrospective analysis of newly developing vertebral fractures after percutane...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2010.48.2.125
更新日期：2010-08-01 00:00:00
abstract：:Syndromic craniosynostosis has severe cranial stenosis and deformity, combined with hypoplastic maxillary bone and other developmental skeletal lesions. Among these various lesions, upper air way obstruction by hypoplastic maxillary bone could be the first life-threatening condition after birth. Aggressive cranial vau...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章,评审
doi：10.3340/jkns.2016.59.3.204
更新日期：2016-05-01 00:00:00
abstract：Objective:Chronic subdural hematoma is a common and relatively benign disease. However, recurrence is common after surgical treatment, and the recurrence rate varies from 5% to 33%. The aim of this study was to investigate the predictive factors for recurrence of chronic subdural hematoma. Methods:We analyzed data fro...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2016.1010.003
更新日期：2017-11-01 00:00:00
abstract：:The authors present a case of multiple intracranial calcifications after the procedure of external ventricular drain placement in a 50-year-old man with pericallosal artery aneurysm. We believe that calcifications formed dust that had fallen into the track during the external ventricular drain procedure. The clinical ...
journal_title：Journal of Korean Neurosurgical Society
pub_type：
doi：10.3340/jkns.2010.47.2.158
更新日期：2010-02-01 00:00:00
abstract：:The most common neurologic manifestations of polycythemia vera (PV) are cerebral infarction and transient ischemic attacks, while cerebral hemorrhage or intracranial dissection has been rarely associated with PV. Here we report the first case of a 59-year-old patient with intracranial supraclinoid internal carotid art...
journal_title：Journal of Korean Neurosurgical Society
pub_type：
doi：10.3340/jkns.2015.58.2.137
更新日期：2015-08-01 00:00:00
abstract：OBJECTIVE:Perfusion computed tomography (PCT) has the ability to measure quantitative value and produce maps of mean transit time (MTT), cerebral blood flow (CBF), and cerebral blood volume (CBV). We assessed cerebral hemodynamics by using these parameters and acetazolamide (ACZ) challenge for pre- and post-procedural ...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2013.54.4.280
更新日期：2013-10-01 00:00:00
abstract：OBJECTIVE:Although traumatic brain injury (TBI) occurs in people of all age groups, the elderly population is at a particular risk. The proportion of elderly population in the society is markedly increasing and Korea is one of the most rapidly aging societies. Here, we analyzed the data from 904 patients older over 65 ...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2018.0017
更新日期：2019-03-01 00:00:00
abstract：OBJECTIVE:Transfemoral catheter angiography (TFCA) is a basic procedure in neurovascular surgery with increasing importance in surgical and non-invasive treatments. Unfortunately, resident neurosurgeons have relatively few opportunities to perform TFCA in most institutions. We report a method developed in our hospital ...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2013.54.2.81
更新日期：2013-08-01 00:00:00
abstract：Objective:This study aims to investigate the relationship between aneurysm wall enhancement and clinical rupture risks based on the magnetic resonance vessel wall imaging (MR-VWI) quantitative methods. Methods:One hundred and eight patients with 127 unruptured aneurysms were prospectively enrolled from Feburary 2016 t...
journal_title：Journal of Korean Neurosurgical Society
pub_type： 杂志文章
doi：10.3340/jkns.2020.0144
更新日期：2020-12-29 00:00:00
abstract：:A 61-year-old woman with a very rare case of totally ossified large thoracic spinal metaplastic meningioma, showing progressing myelopathy is presented. Computed tomographic images showed a large totally ossfied intradural round mass occupying the spinal canal on T9-10 level. Magnetic resonance imaging revealed a larg...
journal_title：Journal of Korean Neurosurgical Society
pub_type：
doi：10.3340/jkns.2013.54.3.257
更新日期：2013-09-01 00:00:00
