Abstract:
OBJECT:Although the gray matter of the spinal cord has been thought to be softer than the white matter, there is no evidence to support this belief. Because the spinal cord is extremely soft, it has been difficult to measure the mechanical properties of the gray and white matter. The modulis of elasticity of the gray and white matter were measured in situ by using a pipette aspiration method. METHOD:The spinal cord specimens were excised from Japanese white rabbits. Specimens were cut to display the surfaces of axial, frontal, and sagittal sections. The surfaces of the gray and white matter were aspirated using a 0.8-mm-inner-diameter glass pipette while monitoring with a video microscope, and the deformed length in the pipette was measured on a monitor. In each case the modulus of elasticity was calculated by comparing the relationship between the aspiration pressure and aspirated volume of the specimen with that determined by finite element analysis. The moduli of elasticity of the gray and white matter were 3.4+/-1.4 kPa (mean +/- standard deviation) and 3.4+/-0.9 kPa in the axial section, 3+/-0.3 kPa and 3.5+/-0.5 kPa in the frontal section, and 3.5+/-0.9 kPa and 2.8+/-0.4 kPa in the sagittal section, respectively. CONCLUSIONS:No significant difference in modulus of elasticity was shown between the gray and white matter of the spinal in sections made in various directions.
journal_name
J Neurosurgjournal_title
Journal of neurosurgeryauthors
Ozawa H,Matsumoto T,Ohashi T,Sato M,Kokubun Sdoi
10.3171/spi.2001.95.2.0221subject
Has Abstractpub_date
2001-10-01 00:00:00pages
221-4issue
2 Suppleissn
0022-3085issn
1933-0693journal_volume
95pub_type
杂志文章abstract::OBJECTIVE The middle clinoid process (MCP) is a bony projection that extends from the sphenoid bone near the lateral margin of the sella turcica. The varied prevalence and morphological features of the MCP in populations stratified by age, race, and sex are unknown; however, the knowledge of its anatomy and preoperati...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2017.2.JNS162114
更新日期:2018-07-01 00:00:00
abstract::Head trauma, intracerebral hematoma formation, and hemorrhagic cerebral infarction cause extravasation of the intravascular contents, red blood cell (RBC) hemolysis, hemosiderin deposition within the neuropil, and an increased incidence of epilepsy. Reports conflict regarding the efficacy of the administration of prop...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1984.60.3.0467
更新日期:1984-03-01 00:00:00
abstract::An unusual case of a sacral, extradural choroid plexus papilloma involving the S1-3 level is described. This 50-year-old woman presented with a 4-month history of pain involving her right buttock, perineum, and leg. Contrast-enhanced magnetic resonance (MR) imaging of the spine revealed a well-defined, mildly enhancin...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/spi.2002.97.1.0102
更新日期:2002-07-01 00:00:00
abstract:OBJECT:This outcome study was undertaken to investigate the long-term results obtained in surgically treated pediatric patients with lumbar disc disease by using standardized medical outcome scales and clinical follow-up examination. METHODS:Twenty nine patients 17 years of age or younger underwent surgery between 196...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/spi.2000.92.1.0001
更新日期:2000-01-01 00:00:00
abstract::Two patients with painless hypertrophy of one calf had clinical and myelographic features compatible with an S-1 radiculopathy. Electromyographic studies revealed intermittent spontaneous discharges (bizarre repetitive potentials) in the affected extremity. Several patients have previously been described with S-1 radi...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1985.62.3.0442
更新日期:1985-03-01 00:00:00
abstract::The author describes the syndrome of suprascapular nerve entrapment neuropathy that occurs as that nerve passes beneath the transverse scapular ligament, and discusses the anatomy, comparative anatomy, and five case histories. The cardinal findings include pain in the shoulder, weakness, and wasting of spinati muscles...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1975.43.3.0337
更新日期:1975-09-01 00:00:00
abstract:OBJECT:It is unclear if there is a relationship between Chiari malformation Type I (CM-I) and body mass index (BMI). The aim of this study was to identify the relationship between BMI and cerebellar tonsil position in a random sample of people. METHODS:Cerebellar tonsil position in 2400 subjects from a cohort of patie...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2014.10.JNS141317
更新日期:2015-07-01 00:00:00
abstract::Because it is often difficult to diagnose accurately the structurally intact cervical spine after acute trauma, a series of patients was evaluated with magnetic resonance (MR) imaging to assess its efficacy for the evaluation and clearance of the cervical spine in a trauma victim in the early posttrauma period. Ultral...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1996.85.5.0824
更新日期:1996-11-01 00:00:00
abstract::In patients with vein of Galen malformations, high-flow shunting decreases cerebral perfusion. By reducing or eliminating these shunts, transarterial embolization can improve cerebral perfusion and clinical outcomes. Quantifying pre- and postembolization shunt blood flow may help determine the optimal timing and effic...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/ped.2006.104.1.41
更新日期:2006-01-01 00:00:00
abstract:OBJECTIVE:Data on long-term functional recovery (LFR) following severe brain injury are essential for counseling of surrogates and for appropriate timing of outcome assessment in clinical trials. Delayed functional recovery (DFR) beyond 3-6 months is well documented following severe traumatic brain injury (sTBI), but t...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2018.2.JNS173247
更新日期:2018-07-06 00:00:00
abstract::OBJECTIVE Hemangiopericytomas (HPCs) are rare tumors widely recognized for their aggressive clinical behavior, high recurrence rates, and distant and extracranial metastases even after a gross-total resection. The authors report a large multicenter study, through the International Gamma Knife Research Foundation (IGKR...
journal_title:Journal of neurosurgery
pub_type: 杂志文章,多中心研究
doi:10.3171/2016.1.JNS152860
更新日期:2017-03-01 00:00:00
abstract:OBJECT:Noninvasive neuroimaging techniques are increasingly identifying unruptured intracranial arterial dissections (IADs) at examination for headache or ischemic symptoms. Approximately 3% of cases of aneurysmal subarachnoid hemorrhage (SAH) are caused by IADs in Japan, but the natural history of unruptured IADs is n...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2010.9.JNS10668
更新日期:2011-04-01 00:00:00
abstract::Saccular aneurysms arising at locations other than at arterial divisions are extremely rare. The authors describe eight such aneurysms that protruded from the dorsal wall of the internal carotid artery (ICA) and were unrelated to any arterial junction. Radical surgery was performed in all eight cases. The aneurysms we...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1986.65.3.0303
更新日期:1986-09-01 00:00:00
abstract::The first documented case of a symptomatic intrasellar hemangioblastoma is described, occurring in an 11-year-old girl with stigmata of von Hippel-Lindau disease who presented with headaches, progressive bitemporal hemianopsia, and adenohypophysial dysfunction. A subtotal resection of the lesion was achieved with two ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1996.84.6.1046
更新日期:1996-06-01 00:00:00
abstract::The President of the American Association of Neurological Surgeons (AANS) reviews formal neurosurgical training in the United States from its inception with one program in 1934 to 1984, with 94 programs and 650 residents. He reports on the 1st year's experience with a national neurosurgical residency matching plan. He...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1984.61.6.0999
更新日期:1984-12-01 00:00:00
abstract:OBJECT:Patients with intracranial vertebrobasilar artery (VBA) atherosclerotic occlusive disease have few therapeutic options. Unfortunately, VBA transient ischemic attacks (TIAs) herald a lethal or devastating event within 5 years in 25 to 30% of patients. The authors report their initial experience with eight patient...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2000.92.5.0771
更新日期:2000-05-01 00:00:00
abstract::Traction injury to the optic nerve and vasa nervorum is the suggested etiology for monocular blindness following trivial frontal trauma. Holographic interferometry was used on human skulls to demonstrate orbital deformation in response to nondestructive frontal loading. The findings suggest an additional mechanism for...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1981.55.6.0963
更新日期:1981-12-01 00:00:00
abstract:OBJECT:The management of massive brain swelling remains an unsolved problem in neurosurgery. Despite newly developed medical and pharmacological therapy, the rates of mortality and morbidity caused by massive brain swelling remain high. According to many recent reports, surgical decompression with dural expansion is su...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1999.91.6.0953
更新日期:1999-12-01 00:00:00
abstract:OBJECT:Until now there has been no reliable stimulation protocol for inducing transient language disruptions while mapping Broca's area. Despite the promising data of only a few studies in which speech arrest and language disturbances have been induced, certain concerns have been raised. The purpose of this study was t...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2013.11.JNS13952
更新日期:2014-05-01 00:00:00
abstract:OBJECTIVE:The endovascular treatment of complex bifurcation aneurysms possessing a neck that incorporates multiple side branches remains a surgical challenge. Double-stent-assisted coiling techniques, such as those with stents in an X and Y configuration, enable the endovascular treatment of wide-necked complex intracr...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2019.9.JNS191733
更新日期:2019-12-06 00:00:00
abstract:OBJECT:The authors assessed the efficacy and complications from gamma knife radiosurgery (GKS) for multiple sclerosis (MS)-associated trigeminal neuralgia (TN). METHODS:There were 15 patients with MS-associated TN (MS-TN). Treatment involved three sequential protocols, 70 to 90-Gy maximum dose, using a single 4-mm iso...
journal_title:Journal of neurosurgery
pub_type: 临床试验,杂志文章
doi:10.3171/jns.2002.97.supplement
更新日期:2002-12-01 00:00:00
abstract::The second lumbar vertebra was surgically removed from 10 dogs, and the shortened vertebral column was stabilized by internal fixation with two types of plastic plates. Shortening of the spinal column was usually not associated with detectable loss of function or neurological deficit. Histological lesions, however, in...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1975.42.1.0047
更新日期:1975-01-01 00:00:00
abstract:OBJECT:Recent observations indicate that traumatic brain injury (TBI) may be associated with mitochondrial dysfunction. This, along with growing use of brain tissue PO2 monitors, has led to considerable interest in the potential use of ventilation with 100% oxygen to treat patients who have suffered a TBI. To date, the...
journal_title:Journal of neurosurgery
pub_type: 临床试验,杂志文章
doi:10.3171/jns.2007.106.4.526
更新日期:2007-04-01 00:00:00
abstract:OBJECT:The goal in this study was to review the effects of treatment plan quality on outcomes after radiosurgery for vestibular schwannoma (VS). METHODS:Between July 1988 and August 2005, 390 patients were treated. The results of this experience have been published recently. In this study the authors looked at dosimet...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/JNS-07/11/0913
更新日期:2007-11-01 00:00:00
abstract::Four adults with unilateral (three cases) or bilateral (one case) closed schizencephaly, medically intractable epilepsy, and otherwise normal neurological examinations are presented. Three were examined preoperatively with magnetic resonance imaging and one with computerized tomography. Scalp electroencephalographic (...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1994.80.5.0820
更新日期:1994-05-01 00:00:00
abstract:OBJECT:The authors undertook this study to identify predictors of persistent postoperative seizures in their group of 28 Dutch pediatric and adolescent patients with medically intractable epilepsy who underwent functional hemispherectomy. METHODS:The records of 28 pediatric and adolescent patients who underwent a func...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/PED-07/10/275
更新日期:2007-10-01 00:00:00
abstract:OBJECT:Intraoperative bleeding often obscures the surgical field and may cause neurological damage. The irrigation fluids used during surgery might affect physiological hemostasis because they modulate the extracellular fluid composition of the bleeding area directly. The authors therefore investigated the influence of...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2009.7.JNS09561
更新日期:2010-04-01 00:00:00
abstract:OBJECT:The authors characterized the clinical course of tectal plate lesions in a group of pediatric patients to identify the prognostic factors at presentation that predict progression, in an attempt to differentiate tectal hamartomas from tumors. METHODS:A retrospective review was conducted of the management of tect...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/ped.2006.104.6.369
更新日期:2006-06-01 00:00:00
abstract::The pathophysiology of extracranial traumatic aneurysm formation has not been fully elucidated. Intraarterial optical coherence tomography (OCT), an imaging modality capable of micrometer cross-sectional resolution, was used to evaluate patients presenting with saccular traumatic aneurysms of the internal carotid arte...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2015.1.JNS142840
更新日期:2016-02-01 00:00:00
abstract:OBJECT:Sedation regimens for head-injured patients are quite variable. The short-acting sedative-anesthetic agent propofol is being increasingly used in such patients, yet little is known regarding its safety and efficacy. In this multicenter double-blind trial, a titratable infusion of 2% propofol accompanied by low-d...
journal_title:Journal of neurosurgery
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.3171/jns.1999.90.6.1042
更新日期:1999-06-01 00:00:00