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1.
Clin Neurophysiol ; 132(7): 1398-1406, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-34038847

RESUMO

OBJECTIVE: To investigate the impact of early vs. delayed surgical decompression on peripheral motor axonal dysfunction following acute traumatic central cord syndrome (ATCCS). METHODS: Both axonal excitability testing and motor unit number estimation (MUNE) were performed in 30 ATCCS patients (early- vs. delayed-surgical treatment: 12 vs. 18) before operation and 28 healthy subjects. Axonal excitability testing was repeated 3-5 days and 1-year after operation, and MUNE was re-evaluated 1-year after operation. RESULTS: Preoperatively, an obvious modification in membrane potentials was observed in ATCCS patients that mostly coincided with depolarization-like features, and MUNE further revealed reduced motor units in tested muscles (P < 0.05). Unlike delayed-surgical cases, early-surgical cases showed recoveries of most measurements of axonal excitabilities soon after operation (P < 0.05). Postoperative one-year follow-up demonstrated that greater motor unit numbers in tested muscles were obtained in early-surgical cases than in delayed-surgical cases (P < 0.05). CONCLUSIONS: ATCCS has adverse downstream effects on peripheral nervous system, even in the early stage of ATCCS. Early surgical treatment can ameliorate both excitability abnormalities and motor unit loss in distal motor axons. SIGNIFICANCE: Optimizing axonal excitability in the early phases of ATCCS may alleviate peripheral nerve injury secondary to lesions of upper motor neuron and improve clinical outcomes.


Assuntos
Potenciais de Ação/fisiologia , Axônios/fisiologia , Síndrome Medular Central/fisiopatologia , Neurônios Motores/fisiologia , Condução Nervosa/fisiologia , Adulto , Idoso , Síndrome Medular Central/complicações , Síndrome Medular Central/diagnóstico , Estudos de Coortes , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Prevenção Secundária/métodos
2.
Am J Emerg Med ; 48: 276-278, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34022634

RESUMO

Burning Hands Syndrome is an unusual variant of central cord syndrome. There have been few published reports, and none in the emergency medicine literature. We present a case of Burning Hands Syndrome in which there were no computed tomography (CT) findings of cervical spine injury and only subtle magnetic resonance (MR) abnormalities. We discuss the importance of early diagnosis, as the optimal management of these patients ultimately depends upon prompt recognition of the underlying cervical trauma and a spinal cord at risk for further injury.


Assuntos
Síndrome Medular Central/diagnóstico por imagem , Mãos , Dor/fisiopatologia , Acidentes por Quedas , Síndrome Medular Central/fisiopatologia , Vértebras Cervicais , Diagnóstico Precoce , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Tomografia Computadorizada por Raios X
3.
J Neurol Surg A Cent Eur Neurosurg ; 81(4): 318-323, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32294792

RESUMO

To review the experience of managing central cord syndrome (CCS) surgically, we retrospectively reviewed 71 patients from October 2015 to April 2017. Deteriorating neurologic status with evidence of radiologic compression and spinal instability were absolute indications for surgery. The American Spinal and Injury Association (ASIA) motor scores (AMS) were recorded at the time of admission (aAMS), 3 days postoperatively (3dAMS), 1 month postoperatively(1mAMS), and at final follow-up (fAMS). Analysis of variance was performed to compare 3dAMS, 1mAMS, and fAMS. Surgery was successful in all 71 patients without re-injury of the spinal cord, infection, or other perioperative complications. The postoperative AMS at 3 days, 1 month, and at the final follow-up significantly improved over preoperative scores. ASIA sensory scores at fAMS were significantly better than 3dAMS and1mAMS scores. The ASIA motor and sensory scores at 1mAMS showed no significant improvements compared with the 3dAMS. Therefore, for patients diagnosed with CCS, combined with evidence of radiologic compression and spinal instability, surgery was beneficial in terms of gains in neurologic recovery.


Assuntos
Síndrome Medular Central/cirurgia , Recuperação de Função Fisiológica/fisiologia , Adulto , Idoso , Síndrome Medular Central/fisiopatologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Procedimentos Neurocirúrgicos , Estudos Retrospectivos , Resultado do Tratamento
4.
Clin Biomech (Bristol, Avon) ; 74: 58-65, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-32145670

RESUMO

BACKGROUND: The pathogenesis of the central cord syndrome is still unclear. While there is a consensus on hyperextension as the main traumatic mechanism leading to this condition, there is yet to be consensus in studies regarding the pathological features of the spine (intervertebral disc bulging or ligamentum flavum hypertrophy) that could contribute to clinical manifestations. METHODS: A comprehensive finite element model of the cervical spine segment and spinal cord was used to simulate high-speed hyperextension. Four stenotic cases were modelled to study the effect of ligamentum flavum hypertrophy and intervertebral disc bulging on the von Mises stress and strain. FINDINGS: During hyperextension, the downward displacement of the ligamentum flavum and a reduction of the spinal canal diameter (up to 17%) led to a dynamic compression of the cord. Ligamentum flavum hypertrophy was associated with stress and strain (peak of 0.011 Mpa and 0.24, respectively) in the lateral corticospinal tracts, which is consistent with the histologic pattern of the central cord syndrome. Linear intervertebral disc bulging alone led to a higher stress in the anterior and posterior funiculi (peak 0.029 Mpa). Combined with hypertrophic ligamentum flavum, it further increased the stress and strain in the corticospinal tracts and in the posterior horn (peak of 0.023 Mpa and 0.35, respectively). INTERPRETATION: The stenotic typology and geometry greatly influence stress and strain distribution resulting from hyperextension. Ligamentum flavum hypertrophy is a main feature leading to central cord syndrome.


Assuntos
Síndrome Medular Central/patologia , Disco Intervertebral/patologia , Ligamento Amarelo/patologia , Síndrome Medular Central/fisiopatologia , Humanos , Hipertrofia , Disco Intervertebral/fisiopatologia , Ligamento Amarelo/fisiopatologia , Masculino
5.
Spine (Phila Pa 1976) ; 45(14): E829-E838, 2020 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-32097277

RESUMO

STUDY DESIGN: An ambispective cohort analysis. OBJECTIVE: The aim of this study was to investigate the impact of early (≤2 weeks) versus delayed (>2 weeks) surgical intervention on the spinal motor neurons at and distal to injury site in acute traumatic central cord syndrome (ATCCS). SUMMARY OF BACKGROUND DATA: Accumulating evidence demonstrated degeneration in distal lower motor neurons (LMNs) following spinal cord injury, and this secondary degeneration may exacerbate motor impairments and limit spontaneous motor recovery. However, few studies involved this pathological process in ATCCS. METHODS: Motor unit number estimation (MUNE) was performed on both abductor pollicis brevis (APB) and extensor digitorum brevis (EDB) in 69 ATCCS patients (early vs. delayed surgical-treatment: 29 vs. 35) and 42 healthy subjects. All patients were assessed by American spinal injury association and Medical Research Council scales. These examinations and disabilities of arm, shoulder, and hand (c) questionnaire were administered approximately 21 months after operation in 65 of these patients. RESULTS: Preoperatively, MUNE values were lower in cervical-innervated muscles of ATCCS patients than in those of controls, and reduced motor units were observed in lumbosacral-innervated muscles in ATCCS patients with preoperative duration over 6 months (P < 0.05). Increased motor unit size without modification of MUNE values was found in delayed-surgical patients, whereas early-surgical patients mainly showed increased MUNE values in tested muscles between two assessments (P < 0.05). The postoperative follow-up analysis identified larger motor unit size and relatively fewer motor units in tested muscles, as well as higher DASH scores, in delayed-surgical patients than in early-surgical patients (P < 0.05). CONCLUSION: ATCCS has adverse downstream effects on the LMNs distal to injury site. Surgical intervention within 2 weeks after injury in ATCCS patients may be beneficial in ameliorating dysfunction of spinal motor neurons at and distal to injury site, reducing secondary motor neuron loss, and eventually improving neurologic outcomes. LEVEL OF EVIDENCE: 3.


Assuntos
Síndrome Medular Central , Descompressão Cirúrgica , Neurônios Motores/fisiologia , Síndrome Medular Central/fisiopatologia , Síndrome Medular Central/cirurgia , Estudos de Coortes , Descompressão Cirúrgica/efeitos adversos , Descompressão Cirúrgica/estatística & dados numéricos , Humanos , Coluna Vertebral/cirurgia , Tempo para o Tratamento/estatística & dados numéricos
7.
Eur Spine J ; 26(1): 56-63, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-27116258

RESUMO

PURPOSE: To develop a large animal model for acute central cervical spinal cord injury syndrome (ACCSCIS. METHODS: Twenty-four adult male goats were randomized into four groups including group A with acute compression injury, group B with anterior chronic compression, group C as the test group that received anterior chronic compression by screw and acute compression by posterior balloon insertion, and group D as normal controls that received sham surgery. Neurological function (modified Tarlov motor function), CT, MRI, cortical somatosensory evoked potentials (CSEP), and pathological analysis were evaluated. The data were analyzed statistically. RESULTS: The motor function of the goats in group C was significantly lower than other groups. CSEP before spinal cord compression showed a stable pattern. Spinal cord compression resulted in a gradual decrement in the peak latency and significant increment in the peak amplitude. Cervical spinal canal occupying ratio was significantly lower in group C than the other groups. MRI revealed focal low signal in T1 weighted images and focal high signal in T2 weighted images in group C. Pathological analysis showed more severe lesions in the gray matter than that in the white matter in group C. CONCLUSIONS: The model well simulated the pathogenesis and resembled the clinical characteristics of ACCSCIS. This model seems to have the potential to contribute to the development of effective therapies for ACCSCIS.


Assuntos
Síndrome Medular Central/fisiopatologia , Vértebras Cervicais/lesões , Potenciais Somatossensoriais Evocados/fisiologia , Compressão da Medula Espinal/fisiopatologia , Traumatismos da Medula Espinal/fisiopatologia , Animais , Vértebras Cervicais/fisiopatologia , Modelos Animais de Doenças , Cabras , Distribuição Aleatória
8.
Spine (Phila Pa 1976) ; 41 Suppl 7: S27, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27015067

RESUMO

Spinal cord injury (SCI) can be complete or incomplete. The level of injury in SCI is defined as the most caudal segment with motor function rated at greater than or equal to 3/5, with pain and temperature preserved. The standard neurological classification of SCI provided by the American Spinal Injury Association (ASIA) assigns grades from ASIA A (complete SCI) through ASIA E (normal sensory/motor), with B, C, and D representing varying degrees of injury between these extremes. The most common causes of SCI include trauma (motor vehicle accidents, sports, violence, falls), degenerative spinal disease, vascular injury (anterior spinal artery syndrome, epidural hematoma), tumor, infection (epidural abscess), and demyelinating processes (). (SDC Figure 1, http://links.lww.com/BRS/B91)(Figure is included in full-text article.).


Assuntos
Síndrome de Brown-Séquard , Síndrome Medular Central , Ferimentos por Arma de Fogo , Síndrome de Brown-Séquard/diagnóstico por imagem , Síndrome de Brown-Séquard/etiologia , Síndrome de Brown-Séquard/fisiopatologia , Síndrome Medular Central/diagnóstico por imagem , Síndrome Medular Central/etiologia , Síndrome Medular Central/fisiopatologia , Humanos , Ferimentos por Arma de Fogo/complicações , Ferimentos por Arma de Fogo/diagnóstico por imagem
9.
J Neurosurg Spine ; 24(5): 792-6, 2016 May.
Artigo em Inglês | MEDLINE | ID: mdl-26745351

RESUMO

OBJECTIVE The aim of this paper was to compare the severity of the initial neurological injury as well as the early changes in the American Spinal Injury Association (ASIA) motor score (AMS) between central cord syndrome (CCS) patients with and without an increased T2 signal intensity in their spinal cord. METHODS Patients with CCS were identified and stratified based on the presence of increased T2 signal intensity in their spinal cord. The severity of the initial neurological injury and the progression of the neurological injury over the 1st week were measured according to the patient's AMS. The effect of age, sex, congenital stenosis, surgery within 24 hours, and surgery in the initial hospitalization on the change in AMS was determined using an analysis of variance. RESULTS Patients with increased signal intensity had a more severe initial neurological injury (AMS 57.6 vs 75.3, respectively, p = 0.01). However, the change in AMS over the 1st week was less severe in patients with an increase in T2 signal intensity (-0.85 vs -4.3, p = 0.07). Analysis of variance did not find that age, sex, Injury Severity Score, congenital stenosis, surgery within 24 hours, or surgery during the initial hospitalization affected the change in AMS. CONCLUSIONS The neurological injury is different between patients with and without an increased T2 signal intensity. Patients with an increased T2 signal intensity are likely to have a more severe initial neurological deficit but will have relatively minimal early neurological deterioration. Comparatively, patients without an increase in the T2 signal intensity will likely have a less severe initial injury but can expect to have a slight decline in neurological function in the 1st week.


Assuntos
Síndrome Medular Central/diagnóstico por imagem , Imageamento por Ressonância Magnética , Recuperação de Função Fisiológica/fisiologia , Medula Espinal/diagnóstico por imagem , Adulto , Idoso , Síndrome Medular Central/fisiopatologia , Feminino , Humanos , Escala de Gravidade do Ferimento , Masculino , Pessoa de Meia-Idade , Exame Neurológico , Prognóstico , Estudos Retrospectivos , Medula Espinal/fisiopatologia
10.
Eur Spine J ; 24(5): 985-9, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-25749728

RESUMO

PURPOSE: To compare early changes in the ASIA Motor Score (AMS) between patients with central cord syndrome (CCS) from an acute fracture to patients without a fracture. METHODS: Patients with CCS were identified and stratified based on the presence of a fracture. The AMS through the first week of the patients' hospitalization was obtained. Initial injury severity as well as early neurologic recovery was measured using the AMS. Analysis of variance was performed to determine if age, gender, rectal tone at presentation, congenital stenosis, or surgery within 24 h significantly effected the change in AMS. RESULTS: A strong trend (p = 0.0504) towards a more severe initial neurologic injury in patients with a fracture (AMS 59.7) than in patients without a fracture (AMS 70.2) was identified. However, in the week after injury, patients with a fracture had an improvement in their neurologic function (ΔAMS +4.8) while patients without a fracture demonstrated neurologic decline (ΔAMS -5.9). The change in AMS between patients with and without a fracture was nearly significant (p = 0.06). CONCLUSION: Patients with central cord syndrome present with similar symptoms, but injuries with and without a fracture may be associated with a different early neurologic recovery. Patients with a fracture have a more severe injury at initial presentation, but tend to have neurologic improvement in the first week; conversely patients without a fracture have a less severe initial neurologic injury, but tend to have a slight decline in neurologic function over the first week.


Assuntos
Síndrome Medular Central/fisiopatologia , Fraturas da Coluna Vertebral/fisiopatologia , Adulto , Idoso , Síndrome Medular Central/etiologia , Síndrome Medular Central/patologia , Feminino , Humanos , Escala de Gravidade do Ferimento , Masculino , Pessoa de Meia-Idade , Regeneração Nervosa/fisiologia , Prognóstico , Recuperação de Função Fisiológica , Fraturas da Coluna Vertebral/etiologia , Fraturas da Coluna Vertebral/patologia
11.
Disabil Rehabil ; 35(22): 1869-76, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23600711

RESUMO

PURPOSE: This is a pilot study with the aim to highlight the use of kinematic and kinetic analyses as an adjunct to the assessment of individual patients with central cord syndrome (CCS) and hemisection or Brown-Séquard syndrome (BSS) and to discuss their possible consequences for clinical management. METHODS: The sample studied consisted of 17 patients with CCS, 13 with BSS and 20 control subjects (control group (CG)). Data were obtained using a three-dimensional motion analysis system and two force plates. Gait differences were compared between CCS, BSS walking at a self-selected speed and CG at both a self-selected and a similar speed to that of the patient groups. RESULTS: The most relevant findings involved the knee and ankle, especially in the sagittal plane. In patients with CCS, knee flexion at initial contact was increased with respect to those in the BSS group (p < 0.01). The ankle in the BSS group made initial contact with a small degree of plantar flexion. CONCLUSION: The use of gait biomechanical analysis to detect underlying impairments can help the physician to set a specific rehabilitation program in each CCS and BSS walking patient. In this group of patients, rehabilitation treatment should aim to improve gait control and optimise ankle positioning at initial contact. Implications for Rehabilitation In this study, gait differences between patients with CSS and BSS were evaluated with biomechanical equipment. The most remarkable differences were found in the knee and ankle sagittal plane due to ankle position at initial contact. In this group of patients, rehabilitation treatment should aim to improve gait control and to get a better ankle positioning at initial contact.


Assuntos
Síndrome de Brown-Séquard/fisiopatologia , Síndrome Medular Central/fisiopatologia , Marcha/fisiologia , Caminhada/fisiologia , Adulto , Análise de Variância , Articulação do Tornozelo/fisiologia , Fenômenos Biomecânicos/fisiologia , Síndrome de Brown-Séquard/reabilitação , Estudos de Casos e Controles , Síndrome Medular Central/reabilitação , Avaliação da Deficiência , Feminino , Articulação do Quadril/fisiologia , Humanos , Articulação do Joelho/fisiologia , Masculino , Pessoa de Meia-Idade
12.
J Neuroeng Rehabil ; 8: 7, 2011 Feb 02.
Artigo em Inglês | MEDLINE | ID: mdl-21288347

RESUMO

BACKGROUND: Central cord syndrome (CCS) is considered the most common incomplete spinal cord injury (SCI). Independent ambulation was achieved in 87-97% in young patients with CCS but no gait analysis studies have been reported before in such pathology. The aim of this study was to analyze the gait characteristics of subjects with CCS and to compare the findings with a healthy age, sex and anthropomorphically matched control group (CG), walking both at a self-selected speed and at the same speed. METHODS: Twelve CCS patients and a CG of twenty subjects were analyzed. Kinematic data were obtained using a three-dimensional motion analysis system with two scanner units. The CG were asked to walk at two different speeds, at a self-selected speed and at a slower one, similar to the mean gait speed previously registered in the CCS patient group. Temporal, spatial variables and kinematic variables (maximum and minimum lower limb joint angles throughout the gait cycle in each plane, along with the gait cycle instants of occurrence and the joint range of motion - ROM) were compared between the two groups walking at similar speeds. RESULTS: The kinematic parameters were compared when both groups walked at a similar speed, given that there was a significant difference in the self-selected speeds (p < 0.05). Hip abduction and knee flexion at initial contact, as well as minimal knee flexion at stance, were larger in the CCS group (p < 0.05). However, the range of knee and ankle motion in the sagittal plane was greater in the CG group (p < 0.05). The maximal ankle plantar-flexion values in stance phase and at toe off were larger in the CG (p < 0.05). CONCLUSIONS: The gait pattern of CCS patients showed a decrease of knee and ankle sagittal ROM during level walking and an increase in hip abduction to increase base of support. The findings of this study help to improve the understanding how CCS affects gait changes in the lower limbs.


Assuntos
Fenômenos Biomecânicos , Síndrome Medular Central/fisiopatologia , Marcha/fisiologia , Adulto , Idoso , Tornozelo/fisiologia , Síndrome Medular Central/complicações , Interpretação Estatística de Dados , Feminino , Transtornos Neurológicos da Marcha/etiologia , Transtornos Neurológicos da Marcha/fisiopatologia , Quadril/fisiologia , Humanos , Joelho/fisiologia , Masculino , Pessoa de Meia-Idade , Movimento (Física) , Pelve/fisiologia , Adulto Jovem
13.
Spinal Cord ; 49(5): 614-22, 2011 May.
Artigo em Inglês | MEDLINE | ID: mdl-21151190

RESUMO

STUDY DESIGN: Prospective multicenter cohort study. OBJECTIVES: To compare the neurological recovery and functional outcomes between traumatic central cord syndrome (TCCS) patients and motor incomplete tetraplegic patients. SETTING: European Multicenter Study of human spinal cord injury. METHODS: In 248 traumatic motor incomplete tetraplegics, initial phase (0-15 days) American Spinal Injury Association (ASIA) impairment grading, upper and lower extremity motor scores (UEMS and LEMS), upper and lower sensory scores and chronic phase (6 or 12 months) neurological outcomes were analyzed. In addition, chronic phase self-care and indoor mobility Spinal Cord Independence Measure (SCIM) items were studied. Tetraplegics were subdivided into three groups: (1) non-TCCS group (UEMSLEMS), (2) intermediate-TCCS group (UEMS=(1-9 points)

Assuntos
Síndrome Medular Central/diagnóstico , Síndrome Medular Central/reabilitação , Vias Eferentes/fisiopatologia , Quadriplegia/diagnóstico , Quadriplegia/reabilitação , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Síndrome Medular Central/fisiopatologia , Estudos de Coortes , Diagnóstico Diferencial , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Prospectivos , Quadriplegia/fisiopatologia , Recuperação de Função Fisiológica/fisiologia , Resultado do Tratamento , Adulto Jovem
14.
Spine (Phila Pa 1976) ; 35(21 Suppl): S180-6, 2010 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-20881460

RESUMO

STUDY DESIGN: Systematic review, ambispective analysis of observational data. OBJECTIVE: To make recommendations as to whether or not urgent surgical decompression is ever indicated as the optimal treatment for enhancing neurologic recovery in a patient with acute central cord injury without fracture or instability. SUMMARY OF BACKGROUND DATA: There are currently no standards regarding the role and timing of decompression in acute traumatic central cord syndrome. In the setting of TCCS without spinal column instability, much controversy exists. METHODS: We have performed a thorough literature search based on the following question: "Is there a role for urgent (within 24 hours from injury to surgery) surgical decompression in acute central cord syndrome without fracture or instability specifically to enhance neurologic recovery?" Data including patient demographics, mechanism of injury, comorbidities, neurologic status, and surgical treatment was analyzed from a multicenter STSG observational database. Outcome measured included ASIA Motor Score, ASIA Grade, Functional Independence Measure (FIM) Score, SF-36, Sphincter Disturbance, and Ambulatory status. Measures were recorded on admission, discharge, 6 months and 1 year. RESULTS: At 12-month follow-up, early surgery resulted in a 6.31 point greater improvement in total motor score than did the late surgery group, with a P = 0.0358. At 6-month follow-up, early surgery result in higher chance of improvement in ASIA Grade than late surgery, with an odds ratio = 3.39, while at 12-month follow-up early surgery resulted in a higher chance of improvement in ASIA Grade, with an odds ratio of 2.81. Patients who were operated on within 24 hours had 7.79 U more improvement in FIM Total Score than late surgery at 6 month follow-up, with P = 0.0474. CONCLUSION: The consensus of experts following review of relevant and examination of observational dataset concluded that it is reasonable and safe to consider early surgical decompression in patients with profound neurologic deficit (ASIA = C) and persistent spinal cord compression due to developmental cervical spinal canal stenosis without fracture or instability. Those with less severe deficit (ASIA = D) can be treated with initial observation with surgery potentially at a later date depending on the extent and temporal profile of the patients neurologic recovery.


Assuntos
Síndrome Medular Central/cirurgia , Descompressão Cirúrgica , Espondilose/cirurgia , Doença Aguda , Adulto , Idoso , Idoso de 80 Anos ou mais , Síndrome Medular Central/complicações , Síndrome Medular Central/fisiopatologia , Descompressão Cirúrgica/efeitos adversos , Avaliação da Deficiência , Medicina Baseada em Evidências , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Atividade Motora , Razão de Chances , Seleção de Pacientes , Guias de Prática Clínica como Assunto , Recuperação de Função Fisiológica , Medição de Risco , Fatores de Risco , Índice de Gravidade de Doença , Espondilose/complicações , Espondilose/fisiopatologia , Fatores de Tempo , Resultado do Tratamento , Adulto Jovem
16.
Spinal Cord ; 48(9): 657-63, 2010 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-20585327

RESUMO

STUDY DESIGN: A questionnaire survey. OBJECTIVES: To evaluate the need for the introduction of quantitative diagnostic criteria for the traumatic central cord syndrome (TCCS). SETTING: An online questionnaire survey with participants from all over the world. METHODS: An invitation to participate in an eight-item online survey questionnaire was sent to surgeon members of AOSpine International. RESULTS: Out of 3340 invited professionals, 157 surgeons (5%) from 41 countries completed the survey. Whereas most of the respondents (75%) described greater impairment of the upper extremities than of the lower extremities in their own TCCS definitions, symptoms such as sensory deficit (39%) and bladder dysfunctions (24%) were reported less frequently. Initially, any difference in motor strength between the upper and lower extremities was considered most frequently (23%) as a 'disproportionate' difference in power. However, after presenting literature review findings, the majority of surgeons (61%) considered a proposed difference of at least 10 points of power (based on the Medical Research Council scale) in favor of the lower extremities as an acceptable cutoff criterion for a diagnosis of TCCS. Most of the participants (40%) felt that applying a single criterion to the diagnosis of TCCS is insufficient for research purposes. CONCLUSION: Various definitions of TCCS were used by physicians involved in the spinal trauma care. The authors consider a difference of at least 10 motor score points between upper and lower extremity power a clear diagnostic criterion. For clinical research purposes, this diagnostic criterion can be considered as a face valid addendum to the commonly applied TCCS definition as introduced by Schneider et al.


Assuntos
Síndrome Medular Central/diagnóstico , Coleta de Dados/normas , Avaliação da Deficiência , Debilidade Muscular/diagnóstico , Paralisia/diagnóstico , Inquéritos e Questionários/normas , Síndrome Medular Central/complicações , Síndrome Medular Central/fisiopatologia , Diagnóstico Diferencial , Humanos , Debilidade Muscular/etiologia , Debilidade Muscular/fisiopatologia , Paralisia/etiologia , Paralisia/fisiopatologia
17.
Spine (Phila Pa 1976) ; 35(19): E955-64, 2010 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-20543769

RESUMO

STUDY DESIGN: Numerical techniques were used to study the mechanisms of acute central cord syndrome. OBJECTIVE: To analyze the features of stress distribution in the cervical cord under different injury conditions using finite element model of the cervical cord and to improve the understanding of the possible pathogenesis of acute central cord syndrome. SUMMARY OF BACKGROUND DATA: Acute central cord spinal injury was initially attributed to hemorrhagic damage to the central portion of the spinal cord, but recent histopathologic studies showed that it was predominantly a white matter injury. The precise anatomic location of neuronal injury and the etiology of the clinical manifestation were poorly understood. METHODS: Cervical cord injury was simulated using a finite element model of the cervical enlargement described previously, with the model loaded under 3 traumatic postures: neutral, flexion, and extension. Five traumatic conditions were simulated and analyzed: hyperextension with the pinch force directed to the anterior (A) or posterior (B); flexion injuries (C), vertical compression with the pinch force directed to the anterior (D) or posterior (E). After simulation, several representative cross-sections of each traumatic pattern were selected. In each cross-section, the average von Mises stress of 9 regions, such as anterior funiculus, lateral part of the lateral funiculus, medial part of the lateral funiculus, lateral part of the posterior funiculus, medial part of the posterior funiculus, anterior horn, the bottom of anterior horn, the cervix cornu posterioris, the caput cornu posterioris, and the apex cornu posterioris was recorded. RESULTS: High localized stress occurred at the portion under compression injury and the level above it. High localized stress tended to occur at the lateral part of the anterior horn motor neurons innervating the hand muscles in traumatic conditions A and D. Under conditions A, D, and E, the average localized stress at the anterior and posterior horn of the gray matter was higher than that at the white matter in all selected cross-sections, and the stress was higher at the anterior funiculus, the medial part of the lateral funiculus, and the lateral part of the posterior funiculus in the white matter. Under conditions B and C, the differences of the localized stress between the gray and the white matter were not as significant as under conditions A, D, and E, and the stress was lower at the medial part of the lateral funiculus than that at the lateral part of the posterior funiculus. Under all traumatic conditions, the average stress at the lateral part was higher than that at the medial part of the posterior funiculus. CONCLUSION: Three common traumatic patterns: hyperextension, flexion, and vertical compression, could be the possibly underlying injury mechanisms of the central cervical cord syndrome according to the results of the current finite element analysis. The stress features under different injury conditions were not in complete accord. High stress mainly occurred at the posterior horn, the anterior horn, and the adjacent white matter. The centermost lesion was not common in mild central cord injuries. The upper extremity weakness should be ascribed to the damage at the corticospinal tract and the motor neurons in the anterior horn. Hyperpathia probably resulted from injuries to the posterior horn, the anterior funiculus, and the fasciculus cuneatus. Just as there are varieties of the localized stress features in central cord injuries, variations in clinical presentations were common.


Assuntos
Síndrome Medular Central/etiologia , Simulação por Computador , Modelos Biológicos , Doença Aguda , Fenômenos Biomecânicos , Síndrome Medular Central/fisiopatologia , Vértebras Cervicais/lesões , Vértebras Cervicais/fisiopatologia , Análise de Elementos Finitos , Humanos , Análise Numérica Assistida por Computador , Amplitude de Movimento Articular , Estresse Mecânico , Suporte de Carga
18.
Spinal Cord ; 48(9): 652-6, 2010 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-20048754

RESUMO

STUDY DESIGN: Systematic review. BACKGROUND: The applied definition of traumatic central cord syndrome (TCCS) lacks specific quantified diagnostic criteria. OBJECTIVE: To review currently applied TCCS diagnostic criteria and quantitative data regarding the 'disproportionate weakness' between the upper and lower extremities described in original studies reporting on TCCS subjects. METHODS: A MEDLINE (1966 to 2008) literature search was conducted. The descriptors applied to define TCCS were extracted from all included articles. We included original studies that reported on the differences in motor score (based on the Medical Research Council scale) between the total upper extremity motor score (UEMS) and the total lower extremity motor score (LEMS), in a minimum of five TCCS patients at the time of hospital admission. The mean difference between the total UEMS and the total LEMS of the patients included in each study was calculated. Case reports were excluded. RESULTS: None of the identified studies on TCCS patients reported inclusion and/or exclusion criteria using a quantified difference between the UEMS and LEMS. Out of 30 retrieved studies, we identified seven different clinical descriptors that have been applied as TCCS diagnostic criteria. Nine studies reporting on a total of 312 TCCS patients were eligible for analysis. The mean total UEMS was 10.5 motor points lower than the mean total LEMS. CONCLUSIONS: There is no consensus on the diagnostic criteria for TCCS. Nevertheless, this review revealed an average of 10 motor points between the UEMS and LEMS as a possible TCCS diagnostic criterion. However, further discussion by an expert panel will be required to establish definitive diagnostic criteria.


Assuntos
Síndrome Medular Central/diagnóstico , Síndrome Medular Central/fisiopatologia , Avaliação da Deficiência , Extremidades/fisiopatologia , Paralisia/diagnóstico , Paralisia/fisiopatologia , Braço/inervação , Braço/fisiopatologia , Síndrome Medular Central/complicações , Diagnóstico Diferencial , Extremidades/inervação , Humanos , Perna (Membro)/inervação , Perna (Membro)/fisiopatologia , Debilidade Muscular/diagnóstico , Debilidade Muscular/etiologia , Debilidade Muscular/fisiopatologia , Paralisia/etiologia
19.
Spinal Cord ; 48(5): 407-14, 2010 May.
Artigo em Inglês | MEDLINE | ID: mdl-19901956

RESUMO

STUDY DESIGN: A retrospective analysis of prospectively collected data. OBJECTIVE: A hemisection of the spinal cord is a frequently used animal model for spinal cord injury (SCI), the corresponding human condition, that is, the Brown-Sequard syndrome (BS), is relatively rare as compared with the central cord syndrome (CC). The time course of neurological deficit, functional recovery, impulse conductivity and rehabilitation length of stay in BS and CC subjects were compared. SETTING: Nine European Spinal Cord Injury Rehabilitation Centers. METHODS: Motor score, walking function, daily life activities, somatosensory evoked potentials and length of stay were evaluated 1 and 6 months after SCI, and were compared between age-matched groups of tetraparetic BS and CC subjects. RESULTS: For all analyzed measures no difference in the time course of improvement was found in 15 matched pairs. CONCLUSION: In contrast to the assumption of a better outcome of subjects with BS, no difference was found between the two incomplete SCI groups. This is of interest with respect to the different potential mechanisms leading to a recovery of functions in these two SCI subgroups.


Assuntos
Síndrome de Brown-Séquard/reabilitação , Síndrome Medular Central/reabilitação , Avaliação de Resultados em Cuidados de Saúde/métodos , Recuperação de Função Fisiológica/fisiologia , Traumatismos da Medula Espinal/reabilitação , Atividades Cotidianas , Adulto , Idoso , Idoso de 80 Anos ou mais , Síndrome de Brown-Séquard/fisiopatologia , Síndrome Medular Central/fisiopatologia , Avaliação da Deficiência , Eletrodiagnóstico , Potenciais Somatossensoriais Evocados/fisiologia , Feminino , Humanos , Tempo de Internação , Masculino , Pessoa de Meia-Idade , Modalidades de Fisioterapia/estatística & dados numéricos , Prognóstico , Estudos Prospectivos , Estudos Retrospectivos , Medula Espinal/patologia , Medula Espinal/fisiopatologia , Traumatismos da Medula Espinal/fisiopatologia , Índices de Gravidade do Trauma , Resultado do Tratamento , Adulto Jovem
20.
J Am Acad Orthop Surg ; 17(12): 756-65, 2009 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-19948700

RESUMO

Central cord syndrome is the most common type of incomplete spinal cord injury. This syndrome most often occurs in older persons with underlying cervical spondylosis caused by a hyperextension mechanism. It also occurs in younger persons who sustain trauma to the cervical spine and, less commonly, as a result of nontraumatic causes. The upper extremities are more affected than the lower extremities, with motor function more severely impaired than sensory function. Central cord syndrome presents a spectrum, from weakness limited to the hands and forearms with sensory preservation, to compete quadriparesis with sacral sparing as the only evidence of incomplete spinal cord injury. Historically, treatment has been nonsurgical, but recovery is often incomplete. Early surgical treatment of central cord syndrome remains controversial. However, recent studies have shown benefits, particularly of early surgery to decompress the spinal cord in patients with pathologic conditions revealed by radiography or MRI.


Assuntos
Síndrome Medular Central , Diagnóstico por Imagem/métodos , Laminectomia/métodos , Síndrome Medular Central/diagnóstico , Síndrome Medular Central/fisiopatologia , Síndrome Medular Central/cirurgia , Vértebras Cervicais , Humanos , Prognóstico , Fatores de Tempo , Índices de Gravidade do Trauma
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