occipital bone
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Author(s):  
Merve Sevgi İNCE ◽  
Güneş AYTAÇ ◽  
Esma Deniz BARÇ ◽  
Yener BEKTAŞ ◽  
Ahmet Cem ERKMAN ◽  
...  

Introduction: The craniovertebral junction comprises the occipital bone, atlas, axis and supporting ligaments. Surgical interventions for treatment of instability, require knowledge of morphometric properties of this area. Therefore, the aim of the present study was to evaluate adult dried human skulls to analyze morphometric features of the bones that joined the craniovertebral junction. Materials and Methods: Morphometric analysis was performed on dry bones which found in the excavations. 9 occipital bone, 18 atlas and 16 axis were measured. Differences between measurements were determined using t-tests and were considered significant at p<0.05. Results: The distance between both tips of the transverse processes (p<0.001), the distance between both outermost edges of the transverse foramen (p=0.011), the distance between both innermost edges of the transverse foramen (p=0.013), the maximum transverse diamater of the vertebral canal (p=0.014), the maximum anteroposterior diameter of the vertebral canal (p=0.014) and the width of the inferior articular facet (left p<0.001 and right p=0.005) were found significantly shorter in females atlases. The width of the dens axis (p<0.001), the height of the corpus axis (p=0.034), the distance from lateral most edge of the transvers process to midline (left p=0.049), the length of the inferior articular facet (left p=0.004, right p=0.005), the width of the superior articular facet (right p=0.007) were found significantly shorter in females axises. Conclusion: Morphometric analysis is very important in the development and improvement of surgical techniques. In this context, the results of our study can contribute to developments in this area. Keywords: Atlas, axis, occipital bone, craniovertebral junction


2021 ◽  
Author(s):  
M. Grzonkowska ◽  
M. Baumgart ◽  
M. Badura ◽  
M. Wiśniewski ◽  
J. Lisiecki ◽  
...  

2021 ◽  
Vol 7 (3) ◽  
pp. 180-185
Author(s):  
Vyachaslav V. Semyonov ◽  
Andrei M. Tsiatsiuyev

A case of missile group identification by comparative examination using the image superposition method is presented. Identification was carried out using a skeletonized body vault exit gunshot fracture. The exit gunshot buttonhole fracture shape and dimensions reflected the bullet caliber and its flank profile. The entrance injury located on the anterior arch of the first cervical vertebra and the basilar part of the occipital bone, in this case, had no identification significance.


2021 ◽  
Vol 22 (8) ◽  
pp. 964-964
Author(s):  
M. Friedland

An interesting view of the causal relationship between these two anomalies is expressed in his report by O. Beck (Zentr. F. Chir .. 1926, no. 16). Based on Vigchow's research, observations by Ghaawitz and his own, Beck believes that facial asymmetry in caput obstipum musculare is caused by basilar depression of the base of the skull due to unilateral pressure of the atlas on the proc, condyloideus of the occipital bone. The latter causes a disorder of the growth of the base of the skull and, as a consequence, basilar kyphosis and scoliosis.


2021 ◽  
Vol 25 ◽  
pp. 101218
Author(s):  
Ryuhei Kitai ◽  
Toshiaki Kodera ◽  
Hiroshi Arai ◽  
Makoto Isozaki ◽  
Takahiro Yamauchi ◽  
...  

Spine ◽  
2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Marie-Jacqueline Reisener ◽  
Artine Arzani ◽  
Ichiro Okano ◽  
Stephan N. Salzmann ◽  
Colleen Rentenberger ◽  
...  

Author(s):  
Tatsuya Ueno ◽  
Shuya Ochiai ◽  
Rena Okudera ◽  
Akira Arai ◽  
Masahiko Tomiyama

2021 ◽  
Vol 8 (4) ◽  
Author(s):  
Choayb S ◽  
◽  
Adil H ◽  
El Haddad S ◽  
◽  
...  

Achondroplasia is the most common hereditary skeletal dysplasia and is characterized by disproportionately short stature with rhizomelic short extremities [1]. The skull features include a narrowed foramen magnum, short skull base, and clivus [2]. Foramen magnum stenosis is a characteristic funding, secondary to an abnormal placement and premature fusion of the posterior synchondroses [1]. The second factor responsible for stenosis is a defect in endochondral ossification in the basiocciput that may result in an extension of the squamous occipital bone [2]. It can cause hydrocephalus and prominent emissary and meningeal veins (Figure 1). Figure 1: Sagittal T1WI revealing a narrowed stenosis of the foramen magnum and compression of the cervicomedullary junction. The most severe complication is the compression of the cervicomedullary junction, associated with severe morbidity and sudden death in younger children [1].


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