Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 42
Filtrar
Mais filtros










Filtros aplicados
Base de dados
Intervalo de ano de publicação
1.
Eur. j. anat ; 23(2): 91-102, mar. 2019. ilus, tab
Artigo em Inglês | IBECS | ID: ibc-182419

RESUMO

Variation in the branches of the aortic arch is higher in individuals of African descent. However, published studies are few. The aims were to document variations in the branching pattern of the aortic arch in a South African sample, determine whether these variants are more common than other populations, and determine whether there are any significant differences in the prevalence of variation between males and females. The aortic arch and main branches were dissected in 733 cadavers. All branching patterns were documented and classified as types. Chi-Square tests were used to determine whether there were any significant differences in prevalence of variation between males and females. The diameters of the main branches were measured and compared between sexes.The standard branching pattern was present in 65% of individuals, similar to that reported for other African studies, but lower than other studies from around the world. Variations were more prevalent in males than in females (p = 0.025), while only the diameter of the left vertebral artery, when arising from the arch was significantly larger in females, with no differences between sexes for the other vessel diameters. The results of this study support the hypothesis that variations in the branching pattern of the aortic arch are more common in African individuals. These individuals may be at increased risk of associated although rare, clinical symptoms or iatrogenic injury


No disponible


Assuntos
Humanos , Masculino , Feminino , Aorta Torácica/anatomia & histologia , Variação Anatômica , Artéria Subclávia/anatomia & histologia , Artéria Vertebral/anatomia & histologia , Dissecação/métodos , Artéria Carótida Primitiva/anatomia & histologia , Estudos Transversais , Análise Estatística , Cadáver , Aorta/anatomia & histologia , África
2.
Eur. j. anat ; 23(1): 49-58, ene. 2019. ilus, tab, graf
Artigo em Inglês | IBECS | ID: ibc-181630

RESUMO

Vertebral artery (VA) variations are important for diagnostic angiographic procedures. This study aimed to describe the anatomical variations of VA using multidetector computed tomography angiography (MDCTA), and to provide a quantitative and qualitative anatomy of the VA groove in dry atlas vertebrae. The study was carried out on 100 MDCTA images from adult Egyptian individuals (69 males; 31 females) and 50 dry atlas fully ossified and of unknown age and sex. MDCTA films were evaluated for VA origin, level of entrance into foramen transversarium, caliber, and distance from the midline. VA grooves in dry bones were examined for the presence of ponticulus posticus (PP). Inner and outer distances from the midline, width and thickness were measured using sliding Vernier caliper. The results revealed that the left VA arose directly from the aortic arch in 7% of cases and was absent in 2% of cases. Atypical entry of VA into foramen transversarium was through C5 (4.5%), followed by C7 (1.5%), then C4 (1%). The left vertebral arteries with direct aortic origin were more medially located than the left arteries with subclavian origin (p=0.005). The mean diameter was significantly greater on the left (3.67±1.07 mm), as compared to the right side (3.36±0.93 mm) (p=0.038). PP was detected in 47% of cases in radiological images and 96% of dry bones. It could be concluded that the most important variations of VA were the aortic origin of the left VA and abnormal entry through transverse foramina. PP was a common variation in atlas vertebrae. These variations should be taken into consideration during radiological and orthopedic procedures


No disponible


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Variação Anatômica , Artéria Vertebral/anatomia & histologia , Atlas Cervical/anatomia & histologia , Radiologia/métodos , Artéria Subclávia/anatomia & histologia , Artéria Subclávia/diagnóstico por imagem , Artéria Vertebral/diagnóstico por imagem , Atlas Cervical/diagnóstico por imagem , Angiografia , Tomografia Computadorizada Multidetectores , Artéria Vertebral/crescimento & desenvolvimento
4.
Eur. j. anat ; 22(5): 419-423, sept. 2018. ilus
Artigo em Inglês | IBECS | ID: ibc-179813

RESUMO

In clinical practice, rare structural vascular variations pose important risks for clinical procedures such as diagnostic vascular interventions or surgical treatment. The authors herein describe a rare case of an unusual origin of both vertebral arteries in a singular adult male cadaver. The two right vertebral arteries independently originated from the right subclavian artery, while the left vertebral artery took origin from the aortic arch. The left vertebral artery entered the 5th transverse foramen while the two right vertebral arteries entered the 4th and 6th transverse foramen, respectively


No disponible


Assuntos
Humanos , Masculino , Idoso , Artéria Vertebral/anormalidades , Variação Anatômica , Artéria Vertebral/embriologia , Cadáver , Forame Magno
6.
Eur. j. anat ; 21(4): 315-317, oct. 2017. ilus
Artigo em Inglês | IBECS | ID: ibc-168649

RESUMO

The atlas plays an important role as a characteristic connective bony element between the cervical spine and the occiput. Its details and variations are of special interest to neurosurgeons - e.g., in a far lateral transcondylar approach. We investigated 121 atlases and their variations. During our investigations, we periodically found atlases with a complete arcuate foramen (canal for vertebral artery) and an additional foramen in the bony roof of a complete arcuate foramen. Different structures passing through this additional foramen are described in the literature, but no artery. We found a macroscopically clear verified artery in a 67-year-old male cadaver passing through the foramen in the bony roof of a complete arcuate foramen. Such an artery is of clinical importance to neurosurgeons or musculoskeletal surgeons, but unmentioned in literature until now. A potential name for this artery could be 'ponticular artery'. The discovered artery is most likely a branch to the neck muscles. The knowledge of a possible existence of such an artery is necessary to prevent complications during surgical procedures in the region of the upper cervical spine. Furthermore, the special course of this artery could be the reason for atrophy and imbalance of deep cervical muscles and consequently headaches


No disponible


Assuntos
Humanos , Artéria Vertebral/anatomia & histologia , Base do Crânio/anatomia & histologia , Ilustração Médica , Anatomia Artística/métodos , Anatomia/educação , Cadáver
8.
Rehabilitación (Madr., Ed. impr.) ; 51(1): 61-64, ene.-mar. 2017. ilus
Artigo em Espanhol | IBECS | ID: ibc-160488

RESUMO

La manipulación cervical es una técnica ampliamente empleada en el tratamiento de dolores cervicales y algunos tipos de cefalea. Es fácil de realizar y generalmente inocua, pero en ocasiones puede producir complicaciones vasculares. Son múltiples los profesionales que la emplean. Presentamos el caso de un paciente que sufre una disección de arteria vertebral e infarto cerebeloso como complicación tardía de una manipulación cervical. Proponemos que en los pacientes con clínica de dolor cervical, cefalea o afectación del territorio vascular posterior a una manipulación cervical estos síntomas sean tenidos en cuenta como posible complicación de la misma (AU)


Cervical manipulation is a widely used technique in the treatment of cervical pain and some types of headache. It is easy to perform and is usually harmless but can occasionally cause vascular complications. The technique is used by multiple professionals. We report the case of a patient with a vertebral artery dissection and cerebellar infarction as a late complication of cervical manipulation. We suggest that symptoms of neck pain, headache or disturbances of the posterior circulation after cervical manipulation should be considered possible complications of the technique (AU)


Assuntos
Humanos , Masculino , Pessoa de Meia-Idade , Manipulação da Coluna/instrumentação , Manipulação da Coluna/métodos , Artéria Vertebral/anatomia & histologia , Artéria Vertebral/patologia , Artéria Vertebral , Infarto Cerebral/complicações , Infarto Cerebral/reabilitação , Infarto Cerebral , Dissecação da Artéria Vertebral/reabilitação , Dissecação da Artéria Vertebral , Cerebelo/fisiopatologia , Cerebelo , Cervicalgia/complicações , Cervicalgia/reabilitação , Cervicalgia
15.
Eur. j. anat ; 18(3): 159-163, jul. 2014. ilus, tab
Artigo em Inglês | IBECS | ID: ibc-125133

RESUMO

Variations of the first segment (V1) of the vertebral arteey (VA) are important to spine surgeons and radiologists. The present study was conducted to document the anatomical variations of the V1 segment and estimate side and gender differences, if any. The study was a cross-sectional analytical study performed on 33 adult cadavers (24 male and 9 female) of Indian origin. The V1 segment of 67 VA was dissected and the following parameters were noted: site of origin, level of entry into cervical spine, presence of tortuosity, length, external diameter and presence of hypoplasia. Side differences were estimated using the paired sample T test and Wilcoxon signed rank test. The independent sample T test and Chi square test were used to estimate gender differences. An unusual origin of the right VA from the thyrocervical trunk, in addition to the origin of the left VA from the arch of the aorta, was noted. Stenotic segments were observed in 4.5% of the VA. Rare levels of entry into the cervical column of the V1 segment of the VA included the foramen transversarium of C5 (4.5%) and C7 vertebra (2.5%). Nine per cent of V1 segments showed a high degree of tortuosity. The mean length and diameter of the V1 segments were 3.7±1.5 cm and 4.2±0.9 mm respectively. Hypoplasia was observed in 18% of the V1 segments. The mean length of the V1 was found to be significantly greater on the left side. Male cadavers had a significantly greater external diameter of V1. The knowledge of these variations of the V1 segment of the VA is imperative for the safe performance of anterior spine procedures


No disponible


Assuntos
Humanos , Variação Anatômica , Artéria Vertebral/anatomia & histologia , Índia/epidemiologia , Coluna Vertebral/cirurgia
17.
Rev. esp. investig. quir ; 16(1): 37-41, ene.-mar. 2013. ilus
Artigo em Inglês | IBECS | ID: ibc-111016

RESUMO

Vertebro-basilar occlusive disease is a condition that can cause symptomatology related to encephalic posterior circulation ischemia. Vertebro-basilar (VB) ischemia represents a 25% of all TIA’s and Strokes in North America (1). In a patient with a VB-TIA, if vertebro-basilar (VB) pathology is demonstrated, he or she will have a 30-35% risk of having a VB circulation stroke in the next 5 years (2); demonstrating that vertebro-basilar occlusive disease is a relevant condition regarding mortality, morbidity and health-related costs. Since Crawford and colleagues described the trans-subclavian vertebral artery endarterectomy by the end of the 50’s, vertebro- basilar occlusive disease has been studied rather little. We pretend to do a revision of this disease, and to discuss briefly the most up-to-date therapies described in current literature for this condition (AU)


No disponible


Assuntos
Humanos , Arteriopatias Oclusivas/cirurgia , Artéria Basilar/cirurgia , Artéria Vertebral/cirurgia , Aterosclerose/complicações , Isquemia/fisiopatologia
18.
Eur. j. anat ; 17(1): 53-58, ene. 2013.
Artigo em Inglês | IBECS | ID: ibc-110452

RESUMO

During routine dissection in an adult male cadaver, the presence of long segment near complete tracheal rings associated with variation in the second (V2) of right vertebral artery (VA) and third (V3) segments of the left VA was encountered. This case report highlights the normal lifespan of an individual despite anatomical variations that are reported to be incompatible with life. Congenital complete and near-complete tracheal rings are extremely rare tracheal deformities, and long-segment occurrences of these variations are usually incompatible with life. They are reported to be associated with cervical chondrogenic anomalies and craniosynostotic syndromes.In the same cadaver the left VA entered the foramen transversarium (FT) of C6 vertebra and exited through the FT of the axis. It formed a loop below the arch of atlas and entered the vertebral canal between the atlas and axis, completely bypassing the FT of the atlas. A branch from the loop divided into two branches, one of which supplied the dorsal ramus of C1, the other ending in the surrounding neck musculature. The right VA was normal, except that it entered the FT of C5 vertebra bypassing C6 vertebra. It was noted that the calibre of the VA on the left side was considerably more than that on the right. Variations in the vertebrobasilar system have a potential clinical impact, since they are the feed arteries of the brain (AU)


No disponible


Assuntos
Humanos , Artéria Vertebral/anormalidades , Malformações Vasculares , Traqueia/anormalidades , Atlas Cervical/anormalidades , Vértebras Cervicais/anormalidades
19.
Fisioterapia (Madr., Ed. impr.) ; 34(3): 118-124, mayo-jun. 2012.
Artigo em Espanhol | IBECS | ID: ibc-111232

RESUMO

Objetivos Los test premanipulativos para la insuficiencia vertebrobasilar (TPIBV) suelen incorporar la rotación cervical para comprobar la solvencia de las arterias vertebrales (AV), aunque las investigaciones acerca del efecto de la rotación en el flujo de la AV discrepan y arrojan dudas en cuanto a la validez de las pruebas. Como un primer paso en esta línea el objetivo fue comprobar el efecto de la rotación cervical en los parámetros hemodinámicos de la AV en sujetos sanos. Material y método Se contó con 10 mujeres voluntarias sanas de 18 a 23 años (media: 20,3; DT: 1,64 años) a las que se le realizaron ecografías Doppler bilaterales en el segmento de la AV suboccipital (AV3) en la posición de rotación neutra, contralateral y homolateral. Se calcularon la velocidad del pico sistólico (VPS), velocidad del pico diastólico (VPD), velocidad media (VM) e índice de resistencia (IR). Los datos se analizaron con una ANOVA de medidas repetidas y las comparaciones se realizaron con la corrección de Bonferroni (SPSS v15.0; IC del 95%).Resultados No se detectaron diferencias estadísticamente significativas en cuanto a la lateralidad y la rotación cervical ni en VPS (FVPS=0,935; p=0,47) ni en VPD (FVPD=1,067; p=0,39), ni en VM (FVM=1,172; p=0,34), ni en IR (FIR=1,183; p=0,33). Debe destacarse la baja potencia de los análisis (entre el 30 y el 38%) por lo que la ausencia de diferencias debe considerarse con precaución. Conclusiones Los parámetros hemodinámicos de la AV no se modificaron en sujetos sanos con las rotaciones cervicales, cuestión que debe ser investigada en sujetos con insuficiencia vertebrobasilar (AU)


Objectives The pre-manipulative vertebrobasilar insufficiency tests (PVBIT) generally incorporate cervical rotation to verify the solvency of the vertebral arteries (VA). However, research on the effect of rotation on VA blood flow differ and question the validity of the tests. The first aim of this study was to verify the effect of cervical rotation on the hemodynamic parameters of the VAs in healthy subjects. Material and method Ten healthy female volunteers, aged 18 to 23 years (mean: 20.3, SD: 1.64 years), were subjected to bilateral Doppler ultrasonographies over the suboccipital segment of the AV (AV3) with neutral, contralateral and ipsilateral cervical rotation positions. We calculated peak systolic velocity (PSV), peak diastolic velocity (PDV), mean velocity (MV) and resistance index (RI). The data were analyzed with repeated measures ANOVA and comparisons were made with Bonferroni correction (SPSS v15.0, C.I. 95%).Results No statistically significant differences were detected regarding lateralization or rotation in the values of PSV (FPSV=0.935, P=.47), or PDV (FPDV=1.067, P=.39), or MV (FMV=1.172, P=.34), or RI (FRI=1.183, P=.33). The low power of analysis (between 30 and 38%) should be noted and thus the absence of differences should be observed with caution. Conclusions Hemodynamic parameters of the VA did not change with cervical rotations in healthy women so that this question should be studied in patients with vertebrobasilar insufficiency (AU)


Assuntos
Humanos , Feminino , Adolescente , Adulto Jovem , Manipulação da Coluna/métodos , Artéria Vertebral/fisiologia , Insuficiência Vertebrobasilar , Vértebras Cervicais/fisiologia , Velocidade do Fluxo Sanguíneo/fisiologia , Ultrassonografia Doppler/métodos , Hemodinâmica , Valores de Referência
20.
Eur. j. anat ; 16(2): 150-156, mayo 2012. ilus, tab
Artigo em Inglês | IBECS | ID: ibc-108906

RESUMO

Variability of the third segment (V3) of vertebral artery (VA) in correlation with individual shape of skull was studied by analyses of 32 MRI and angiograms of 64 arteries. According to value of cranial index, the group under research was divided into three subgroups: dolichocephalic (15.6%), mesocephalic (43.8%), and brachycephalic (40.6%). The V3 was studied according to its conventional division into three sections: vertical (vV3), horizontal (hV3), and oblique (oV3), with proximal and distal loop formations along its length. The mean diameter and length of vV3 and hV3 had minimal value in the patients with brachycephalic shape of skull. The angle between bends of proximal loop of V3 progressively increased from 67.5 } 0.75 degree in the dolichocephalic group to 77.1}0.44 degree in the brachycephalic group, while the angle between bends of distal loop was decreasing from the dolichocephalic group (79.6 } 4.7 degree) to the mesocephalic group (74.85}2.4), reaching the minimal value in the brachycephalic group (79.6 } 4.7 degree). In the dolichocephalic group downward deviation of hV3 was more in evidence than in all the rest groups, with inclination to minimal or zero-deviation in brachycephalic group. The results have showed that the anatomical variability of V3 significant correlates with the shape of skull. The findings open up possibilities for primary diagnosis and prognosis of acute and chronic disorders in posterior circulation enabling to choose the individual surgical approach to the craniocervical junction and base of skull (AU)


No disponible


Assuntos
Humanos , Artéria Vertebral/anatomia & histologia , Crânio/anatomia & histologia , Cefalometria/métodos , Vértebras Cervicais/irrigação sanguínea , Base do Crânio/irrigação sanguínea , Imagem por Ressonância Magnética
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA