Morphometric analysis of pterion: A clinic-anatomical study in north Indian dry skulls

ABSTRACT Objective: The anatomical study of the vertebrae C7 and T1 of the cervicothoracic junction aimed to evaluate quantitatively, by axial computerized tomography (CT), the linear and angular dimensions of the anatomical laminae of the vertebrae of the cervicothoracic junction C7 and T1 in adults over 18 years. Methods: We retrospectively analyzed 49 CT of the cervical and thoracic spine (C7 and T1) of individuals over 18 years, of both sexes. We also evaluated the length and thickness of the laminae, as well as spinolaminar angle in axial sections of C7 and T1 at the point of least thickness between the inner cortical layers. The variables were correlated with age groups and sex of the individuals. Statistical analysis was performed using the t test and the results were considered significant when p<0.05. Results: After analyzing tomographic measurements of 49 patients, it was found that men had greater laminae thickness than women, both in C7 and T1, with 71% of C7 laminae and 92% of T1 laminae thicker than 5mm, and 97% of C7 laminae and 100% of T1 thicker than 4mm. The mean spinolaminar angle was 56.40 degrees in C7 and 57.31 degrees in T1. Conclusion: This study brings important anatomical information about the cervicothoracic junction C7 and T1 in the Brazilian population, showing that fixation of C7 and T1 with intralaminar screws is anatomically possible.

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Morphometric analysis of coracoid process and glenoid cavity in terms of surgical approaches: an anatomical study

Kocaeli Medical Journal ◽

10.5505/ktd.2018.50455 ◽

2018 ◽

Vol 7 (2) ◽

pp. 131-137

Author(s):

Sibel Cirpan ◽

Goksin Nilufer Yonguc ◽

Mustafa Güvençer

Keyword(s):

Morphometric Analysis ◽

Anatomical Study ◽

Coracoid Process ◽

Surgical Approaches ◽

Glenoid Cavity

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Morphometric Analysis of Atlas and Its Clinical Significance: An Anatomical Study of Indian Human Atlas Vertebrae

Indian Journal of Neurosurgery ◽

10.1055/s-0035-1558967 ◽

2015 ◽

Vol 04 (02) ◽

pp. 092-097 ◽

Cited By ~ 1

Author(s):

Mukesh Singla ◽

Kumar Ravi ◽

Prabhat Goel ◽

Raj Kumar ◽

Mohd Ansari

Keyword(s):

Clinical Significance ◽

Morphometric Analysis ◽

Anatomical Study

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Endoscopic endonasal medial-to-lateral and transorbital lateral-to-medial optic nerve decompression: an anatomical study with surgical implications

Journal of Neurosurgery ◽

10.3171/2016.8.jns16566 ◽

2017 ◽

Vol 127 (1) ◽

pp. 199-208 ◽

Cited By ~ 15

Author(s):

Alberto Di Somma ◽

Luigi Maria Cavallo ◽

Matteo de Notaris ◽

Domenico Solari ◽

Thomaz E. Topczewski ◽

...

Keyword(s):

Optic Nerve ◽

Morphometric Analysis ◽

Case Series ◽

Good Control ◽

Anatomical Study ◽

Optic Canal ◽

Endoscopic Endonasal ◽

Nerve Decompression ◽

Bone Removal ◽

Optic Nerve Decompression

OBJECTIVEDifferent surgical routes have been used over the years to achieve adequate decompression of the optic nerve in its canal including, more recently, endoscopic approaches performed either through the endonasal corridor or the transorbital one. The present study aimed to detail and quantify the amount of bone removal around the optic canal, achievable via medial-to-lateral endonasal and lateral-to-medial transorbital endoscopic trajectories.METHODSFive human cadaveric heads (10 sides) were dissected at the Laboratory of Surgical Neuroanatomy of the University of Barcelona (Spain). The laboratory rehearsals were run as follows: 1) preliminary preoperative CT scans of each specimen, 2) anatomical endoscopic endonasal and transorbital dissections and Dextroscope-based morphometric analysis, and 3) quantitative analysis of optic canal bone removal for both endonasal and transorbital endoscopic approaches.RESULTSThe endoscopic endonasal route permitted exposure and removal of the most inferomedial portion of the optic canal (an average of 168°), whereas the transorbital pathway allowed good control of its superolateral part (an average of 192°). Considering the total circumference of the optic canal (360°), the transorbital route enabled removal of a mean of 53.3% of bone, mainly the superolateral portion. The endonasal approach provided bone removal of a mean of 46.7% of the inferomedial aspect. This result was found to be statistically significant (p < 0.05). The morphometric analysis performed with the aid of the Dextroscope (a virtual reality environment) showed that the simulation of the transorbital trajectory may provide a shorter surgical corridor with a wider angle of approach (39.6 mm; 46.8°) compared with the simulation of the endonasal pathway (52.9 mm; 23.8°).CONCLUSIONSUsed together, these 2 endoscopic surgical paths (endonasal and transorbital) may allow a 360° decompression of the optic nerve. To the best of the authors' knowledge, this is the first anatomical study on transorbital optic nerve decompression to show its feasibility. Further studies and, eventually, surgical case series are mandatory to confirm the effectiveness of these approaches, thereby refining the proper indications for each of them.

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AN ANATOMICAL STUDY OF MORPHOLOGY AND MORPHOMETRIC ANALYSIS OF CALCANEUM AND ITS TALAR ARTICULAR SURFACES

International Journal of Anatomy and Research ◽

10.16965/ijar.2017.291 ◽

2017 ◽

Vol 5 (3.2) ◽

pp. 4223-4229

Author(s):

Anbumani T L ◽

◽

Sridharan R ◽

Thamarai Selvi A ◽

◽

...

Keyword(s):

Morphometric Analysis ◽

Anatomical Study ◽

Articular Surfaces

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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.

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