Morphometric Analysis of Axis Vertebra for Atlantoaxial Fixation in Northeastern Brazil

Abstract The gastropod Littoraria angulifera (Littorinidae) is an exclusively estuarine mollusk with Neotropical anfiatlantic distribution. Recent studies indicate a possible use of the species as bioindicator. The aim of this study was to analyze the shell height, as well as to perform a morphometric analysis of the reproductive apparatus of L. angulifera collected in 22 sampling points located between latitudes 13º54'S and 15º44'S in the South Atlantic, State of Bahia, Northeastern Brazil. The specimens were obtained in different estuarine environments including mangroves, as well as on rocks and concrete walls in places close to ports, shipyards and berths during January and February 2014. All specimens (n = 880) were analyzed regarding the sex and shell height/morphology, 440 were analyzed about the reproductive apparatus morphometry and 15 in histological description. The average shell height of animals from artificial substrates in nautical areas was lower (p<0.05) than the animals from mangroves, mainly in preserved areas, evidencing relation with human impacts and desiccation. The morphometric analysis of L. angulifera reproductive tract allowed us to conclude that the length of prostate in males and of palial oviduct in females may be useful in the reproductive evaluation of the species.

Download Full-text

Morphometric Analysis of Populations of Centris aenea Lepeletier (Hymenoptera: Apidae) from Northeastern Brazil

Neotropical Entomology ◽

10.1590/s1519-566x2011000100014 ◽

2011 ◽

Vol 40 (1) ◽

pp. 97-102 ◽

Cited By ~ 3

Author(s):

VS Ferreira ◽

CML Aguiar ◽

MA Costa ◽

JG Silva

Keyword(s):

Morphometric Analysis ◽

Northeastern Brazil

Download Full-text

Morphometric Analysis of Axis Vertebra in Northeastern Brazil

10.5327/1516-3180.399 ◽

2021 ◽

Author(s):

Gustavo de Souza Marques Filho ◽

Ana Karoliny de Souza Gomes ◽

João Pedro Maia Medeiros ◽

Henrique Ribeiro Pessoa Cavalcanti ◽

André Luiz Pinto Fabrício Ribeiro ◽

...

Keyword(s):

Clinical Importance ◽

Cervical Vertebra ◽

Northeastern Brazil ◽

Anatomical Landmarks ◽

Anterior View ◽

Morphological Variations ◽

Axis Vertebra ◽

Significant Difference ◽

Different Populations ◽

Morphological Differences

Introduction: The axis is the second cervical vertebra and differs from the others by presenting particular anatomical landmarks. Morphological variations of the axis in different populations have clinical importance, since the lack of anatomical reference may compromise surgical procedures in this region. Objective: To analyze the morphometry of axis vertebra in northeastern Brazil. Methodology: Data collection was performed at the Federal University of Paraiba. Fifty-eight axis were used. Damaged or infantile vertebrae were excluded.Morphometric analysis was performed using a digital caliper and the data were statistically analyzed. Results were considered significant when p<0.05. Results: The width of the pars interarticulares was 9.25±1.68mm and the height was 7.37±1.87mm. The height of the dens of the axis in an anterior view was 16.29±1.82mm and the width was 9.41±0.86mm. The width of the articular face of the dens was 8.27±0.88mm. The anteroposterior length of the vertebral body was 15.29±2.02mm, the width was 16.79±1.68mm, and the height in anterior view was 19.96±2.48mm. The mean height of the vertebral lamina was 10.89±1.64mm and the anteroposterior length was 20.33±2.13mm. Significant difference was observed between right and left sides of anteroposterior length (p=0.012). Conclusion: Axis morphometry was shown for the first time in a specific population from northeastern Brazil. Morphological differences were observed in the present study and differ from others in the literature. These data may serve as guidance for professionals who will perform any procedures in this region, highlighting the importance of anatomical knowledge and its variations.

Download Full-text

Morphometric Analysis of The Accessory Transverse Foramen in a Population in Northeastern Brazil

Journal of Morphological Sciences ◽

10.51929/jms.38.12.2021 ◽

2021 ◽

Vol 38 ◽

pp. 70-74

Author(s):

João Pedro Medeiros ◽

Jami Santana ◽

Fábio Antônio Lima Júnior ◽

Jonathan Cavalcante ◽

Cecília Leite ◽

...

Keyword(s):

Morphometric Analysis ◽

Northeastern Brazil ◽

Transverse Foramen

Download Full-text

Morphometric analysis of axis vertebra on MRI

MedPulse International Journal of Anatomy ◽

10.26611/10011114 ◽

2019 ◽

Vol 11 (1) ◽

pp. 19-22

Author(s):

Pathan F J ◽

◽

Rubeena Hashmi ◽

Keyword(s):

Morphometric Analysis ◽

Axis Vertebra

Download Full-text

Morphometric analysis of the Inner Continental Shelf in northeastern Brazil for seabed geomorphic classification

Journal of South American Earth Sciences ◽

10.1016/j.jsames.2020.102847 ◽

2020 ◽

Vol 104 ◽

pp. 102847

Author(s):

R.J.A. Macêdo ◽

N.S. Pereira ◽

V.A.V. Manso

Keyword(s):

Continental Shelf ◽

Morphometric Analysis ◽

Northeastern Brazil ◽

Inner Continental Shelf

Download Full-text

Morphometric Analysis of the Hepatocytes from Fish Exposed to Arsenic

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100091391 ◽

1976 ◽

Vol 34 ◽

pp. 282-283

Author(s):

Elsie M. B. Sorensen

Keyword(s):

Morphometric Analysis ◽

Arsenic Concentration ◽

Ultrastructural Changes ◽

Sodium Arsenate ◽

Lepomis Cyanellus ◽

Mammalian Counterpart ◽

Intracellular Changes ◽

Green Sunfish ◽

Organic Pesticides

The detoxification capacity of the liver is well documented for a variety of substances including ethanol, organic pesticides, drugs, and metals. The piscean liver, although less enzymatically active than the mammalian counterpart (1), contains endoplasmic reticulum with an impressive repertoire of oxidizing, reducing, and conjugating abilities (2). Histopathologic changes are kncwn to occur in fish hepatocytes following in vivo exposure to arsenic (3); however, ultrastructural changes have not been reported. This study involved the morphometric analysis of intracellular changes in fish parynchymal hepatocytes and correlation with arsenic concentration in the liver.Green sunfish (Lepomis cyanellus, R.) were exposed to 0, 30, or 60 ppm arsenic (as sodium arsenate) at 20°C for 1, 2, or 3 week intervals before removal of livers for quantification of the arsenic burden (using neutron activation analysis) and morphometric analysis of ultrastructural alterations. Livers were cut into 1 mm cubes for fixation, dehydration, and embedding.

Download Full-text