Abstract:
:Fractures of the odontoid process are potentially serious injuries; Type II and III fractures, as described by Anderson and D'Alonzo, are seen in the emergency room especially in young adolescents and individuals over 60 years of age. The etiology of these fractures is still controversial. Malunion and nonunion in both types of fractures are presumed to be due to insufficient external or internal fixation, but this theory has not been fully explained. To examine these issues, the authors expanded their prior studies of the anatomy of the axis. For histomorphometric analysis of cancellous and cortical bone, the axis was removed in 37 autopsies (26 normal and 11 osteoporotic cases) and sectioned in the sagittal plane to a thickness of 1 mm using a surface-stained block-grinding technique. The base of the dens is the region of least resistance for fractures because of its reduced trabecular bone volume, a poorer trabecular interconnection, and a cortical thickness one-third that of the axis. In all cases, trabeculae were disconnected from the trabecular lattice, and in 30%, microcallus formations were demonstrated in the base of the dens. A special filigree type of trabeculae in the base of the dens is often seen in patients with osteoporosis; microarchitectural differences of cancellous bone between the base of the dens and the other regions of the axis are also markedly increased. The authors infer from the data that the bone structure of the axis is responsible for the location, distribution, and frequency of fractures of the odontoid process in normal healthy bone and this frequency is greatly increased in individuals with osteoporosis. The deficiency of bone mass within the base also suggests a new explanation for the occurrence of nonunions, even after treatment of fractures of the base of the dens.
journal_name
J Neurosurgjournal_title
Journal of neurosurgeryauthors
Amling M,Pösl M,Wening VJ,Ritzel H,Hahn M,Delling Gdoi
10.3171/jns.1995.83.2.0330subject
Has Abstractpub_date
1995-08-01 00:00:00pages
330-5issue
2eissn
0022-3085issn
1933-0693journal_volume
83pub_type
杂志文章abstract::Intracranial arteriovenous malformations (AVM's) have been classified as pure pial, pure dural, and mixed pial and dural. Dural AVM's are relatively uncommon, with 377 cases documented up to 1990. These lesions were believed to be situated within the walls of the sinuses, but during the last decade researchers discove...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1994.81.4.0620
更新日期:1994-10-01 00:00:00
abstract:OBJECT:Dissections were performed in 100 fresh cadaver palms to determine the frequency with which superficial palmar communication between the median and ulnar nerves occurs and to what extent it might incur iatrogenic injury during endoscopic carpal tunnel release. METHODS:Superficial palmar communication between th...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1999.91.6.1027
更新日期:1999-12-01 00:00:00
abstract:OBJECT:The aim of this study was to investigate the incidence of elevated (> or = 75%) jugular venous oxygen saturation (SjvO2) and its relationship to cerebral hemodynamic and metabolic parameters and to outcome after severe head injury. METHODS:Data from 450 severely head injured patients admitted to the Neurosurgic...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1999.90.1.0009
更新日期:1999-01-01 00:00:00
abstract::This is a prospective randomized study of the efficacy of steroid therapy in patients with severe head injury. One hundred patients were randomized into two equal groups: the steroid group received 5 mg/kg/day of methylprednisolone, and the nonsteroid group received no drug. The groups were similar in their clinical f...
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.1981.54.5.0596
更新日期:1981-05-01 00:00:00
abstract:OBJECT:Gamma Knife surgery (GKS) is one of the methods available to treat vestibular schwannomas (VSs), in addition to microsurgical resection; however, clear information regarding balance function outcomes and the impact of treatment on patients' quality of life over time remains an important clinical need. The purpos...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/JNS/2008/109/12/S21
更新日期:2008-12-01 00:00:00
abstract::The authors report outcomes in 18 patients with arteriovenous malformations (AVMs) who were treated with gamma knife radiosurgery and in whom magnetic resonance (MR) imaging was obtained a mean of 14 years (range 8-23 years) after treatment and 10 years (range 4-17 years) after confirmed obliteration of the AVM. All p...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1997.86.4.0589
更新日期:1997-04-01 00:00:00
abstract::A case of giant aneurysmal bone cyst of the skull is reported. Treatment was by total excision in three-staged surgery. The patient made a good recovery. ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1977.47.4.0633
更新日期:1977-10-01 00:00:00
abstract::Although they are excellent clinical tools, Caspar anterior cervical plates have not been studied closely with regard to their mechanisms of failure. As more extensive operations are contemplated on older, sicker patients, it is imperative to know when a plating system might be prone to failure and what the mechanism ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1996.84.6.0957
更新日期:1996-06-01 00:00:00
abstract::This study of the posterior communicating artery (PCoA) in 126 cranial cavities of adult cadavers revealed some hitherto unreported anomalies. These included: the origin of one PCoA from the ophthalmic artery inside the optic canal; the presence of three PCoA's on one side; the occurrence of two posterior cerebral art...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1984.60.3.0572
更新日期:1984-03-01 00:00:00
abstract:OBJECT:The authors studied the microsurgical anatomy of the ophthalmic artery (OphA), paying particular attention to its possibly dangerous anastomoses with the middle meningeal artery (MMA). METHODS:The microsurgical anatomy of the OphA and its anastomoses with the MMA were studied in 14 vessels from seven adult cada...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2007.106.1.142
更新日期:2007-01-01 00:00:00
abstract::Protection of the brain and spinal cord against ischemia is a goal of vast clinical importance. One approach to this objective is to reduce the tissue's functional activity in order to preserve energy for the metabolic processes that are essential to viability. Experiments to explore ways of reducing function-related ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1988.69.4.0568
更新日期:1988-10-01 00:00:00
abstract::The authors report microsurgical treatment in 32 cases of basilar artery aneurysms, operated on with good results in 28 cases, fair results in one, and poor results in one; there were two deaths. Twenty-nine patients (91%) were able to return to social activities. Characteristics of the surgical techniques include 1) ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1979.51.5.0615
更新日期:1979-11-01 00:00:00
abstract::OBJECTIVEThe authors' aim in this study was to evaluate placement accuracy and clinical outcomes in patients who underwent implantation of deep brain stimulation devices with the aid of frame-based stereotaxy and intraoperative MRI after induction of general anesthesia.METHODSThirty-three patients with movement disord...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2017.7.JNS171166
更新日期:2018-12-01 00:00:00
abstract:OBJECT:Due to the complex and variable nature of brachial plexus injury, outcome analysis can be cumbersome and imprecise. Many scales have been devised, but no single scale is used uniformly. Moreover, despite several studies in which the authors have reported brachial plexus surgical data, no highly predictive clinic...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/ped.2007.106.4.276
更新日期:2007-04-01 00:00:00
abstract::The effects of several calmodulin antagonists, such as N-(6-aminohexyl)-5-chloro-1-naphthalene-sulfonamide hydrochloride (W-7) and its dechlorinated structural analogue (W-5), on the growth and proliferation of cultured and transplanted glioma (GA-1, chemically induced from rat glioblasts) were evaluated. Under cultur...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1986.65.1.0074
更新日期:1986-07-01 00:00:00
abstract::Monitoring of cerebral oxygenation is considered to be of great importance in minimizing secondary hypoxic and ischemic brain damage following severe head injury. Although the threshold for cerebral hypoxia in jugular bulb oximetry (measurement of O2 saturation in the jugular vein (SjvO2)) is generally accepted to be ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1996.85.5.0751
更新日期:1996-11-01 00:00:00
abstract::Two unusual cases of neurocutaneous melanosis are presented. Both patients had congenital giant hairy nevi and both developed hydrocephalus, seizures, and myelopathy. The first patient displayed multicentric cerebral and spinal cord melanosis, as opposed to the more commonly described basilar leptomeningeal involvemen...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1984.61.4.0782
更新日期:1984-10-01 00:00:00
abstract::An analysis of Motor Index score, pinprick sensory score, joint position sense score, somatosensory evoked potential (SSEP) grade in the ulnar (SSEPu) and posterior tibial (SSEPt) regions, and overall SSEP grade (mean SSEPu + t) was conducted in 36 patients with cervical spinal cord injuries to determine the relations...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1990.72.4.0600
更新日期:1990-04-01 00:00:00
abstract::OBJECTIVE Quantitative assessment of tumor microvascularity has the potential to improve prognostication, advance understanding of tumor biology, and help narrow potential molecular therapies. While the role of tumor microvascularity has been widely studied in meningiomas, this study examines both the role of automate...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2016.10.JNS161825
更新日期:2018-03-01 00:00:00
abstract::Up to now, navigated transcranial magnetic stimulation (nTMS) has been used for motor mapping in the vicinity of rolandic brain lesions. Recently, nTMS has also been suggested to be useful in mapping human language areas. The authors describe the case of a left-handed patient with a left-side glioblastoma within the...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2012.9.JNS121053
更新日期:2013-01-01 00:00:00
abstract::In 10 patients with supratentorial ependymomas, the tumors exhibited hyperdensity on computerized tomography (CT) scanning prior to contrast infusion and, with one exception, all tumors were mixed lesions with the low densities suggesting cystic or necrotic portions. Eighty percent of the tumors contained small calcif...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1986.64.2.0209
更新日期:1986-02-01 00:00:00
abstract:OBJECT:Skull bone regeneration induced by transforming growth factor-beta1 (TGFbeta1)-containing gelatin hydrogels (TGFbeta1-hydrogels) was investigated using a rabbit skull defect model. Different strengths of TGFbeta1 were examined and compared: different TGFbeta1 doses in gelatin hydrogels with a fixed water content...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2000.92.2.0315
更新日期:2000-02-01 00:00:00
abstract:OBJECT:Neurocognitive performance is used to assess multiple cognitive domains, including motor coordination, before and after carotid endarterectomy (CEA). Although gross motor strength is impaired with ischemia of large cortical areas or of the internal capsule, the authors hypothesize that patients undergoing CEA de...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2014.8.JNS1459
更新日期:2015-01-01 00:00:00
abstract::The authors report on two patients in whom an increased signal on T1-weighted magnetic resonance images and a high-density signal on computerized tomography scans of the striatum were demonstrated, both of which were associated with nonketotic hyperglycemia. Involuntary movements, which have been present in all previo...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2004.101.2.0343
更新日期:2004-08-01 00:00:00
abstract::Bilateral and simultaneous sampling of the inferior petrosal sinuses in patients with Cushing's disease has been used to establish the presence and laterality of adrenocorticotropic hormone (ACTH)-producing microadenomas prior to transsphenoidal surgery. Successful preoperative lateralization depends upon equivalent d...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1988.68.2.0205
更新日期:1988-02-01 00:00:00
abstract::A case of traumatic avulsion of the L-5 and S-1 nerve roots is described. Surgical intervention was undertaken and long-term functional recovery obtained. ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1977.46.4.0536
更新日期:1977-04-01 00:00:00
abstract:OBJECT:The extent of peritumoral brain edema (PTBE) associated with meningiomas can be highly variable. The authors studied the correlation between the development of efferent venous drainage from the tumor and the degree of PTBE that occurs in intracranial meningiomas. METHODS:Twenty-five patients with 27 intracrania...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.2006.104.3.382
更新日期:2006-03-01 00:00:00
abstract:OBJECT:Glutamate is important in the pathogenesis of brain damage after cerebral ischemia and traumatic brain injury. Notably, brain extracellular and cerebrospinal fluid as well as blood glutamate concentrations increase after experimental and clinical trauma. While neurons are one potential source of glutamate, plate...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2014.3.JNS132130
更新日期:2014-12-01 00:00:00
abstract:OBJECTIVE:Craniopharyngiomas are rare and benign tumors of the sellar and/or parasellar region. Primary treatment involves resection followed by adjuvant radiotherapy. While the grade of resection was frequently analyzed following surgery, the neurological outcome and especially neuropsychological deficits and quality ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/2018.10.JNS181557
更新日期:2019-04-19 00:00:00
abstract::A combined radiological and surgical technique that permits identification of appropriate recipient vessels and accurate placement of the atrial catheter in ventriculoatrial shunts is described. The procedure uses readily available radiological skills and reduces operation time and morbidity related to malpositioning ...
journal_title:Journal of neurosurgery
pub_type: 杂志文章
doi:10.3171/jns.1995.82.1.0140
更新日期:1995-01-01 00:00:00