The petrosquamous suture is a cranial suture between the petrous portion and the squama of the temporal bone. It forms the Koerner's septum. The petrous portion forms the medial component of the osseous margin, while the squama forms the lateral component. The anterolateral portion (squama) arises from the mesenchyme at 8 weeks of embryogenesis while the petromastoid portion develops later from a cartilaginous center at 6 months of fetal development.
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| - Fissure pétro-squameuse (fr)
- Petrosquamous suture (en)
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| - La fissure pétro-squameuse (ou scissure pétro-squameuse) est une suture crânienne entre la partie pétreuse médialement et l'écaille de l'os temporal latéralement. Un segment supérieur ou interne est visible sur la face endocrânienne de l'os temporal à l'union de l'écaille et de la partie pétreuse. Un segment postérieur ou externe est visible sur la face exocrânienne de l'os temporal à l'union de l'écaille et de la portion mastoïdienne. (fr)
- The petrosquamous suture is a cranial suture between the petrous portion and the squama of the temporal bone. It forms the Koerner's septum. The petrous portion forms the medial component of the osseous margin, while the squama forms the lateral component. The anterolateral portion (squama) arises from the mesenchyme at 8 weeks of embryogenesis while the petromastoid portion develops later from a cartilaginous center at 6 months of fetal development. (en)
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| - Petrosquamous suture (en)
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| - Petrosquamous suture (en)
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| - Base of the skull. Upper surface. (en)
- Temporal bone at birth. Inner aspect. (en)
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| - La fissure pétro-squameuse (ou scissure pétro-squameuse) est une suture crânienne entre la partie pétreuse médialement et l'écaille de l'os temporal latéralement. Un segment supérieur ou interne est visible sur la face endocrânienne de l'os temporal à l'union de l'écaille et de la partie pétreuse. Un segment postérieur ou externe est visible sur la face exocrânienne de l'os temporal à l'union de l'écaille et de la portion mastoïdienne. (fr)
- The petrosquamous suture is a cranial suture between the petrous portion and the squama of the temporal bone. It forms the Koerner's septum. The petrous portion forms the medial component of the osseous margin, while the squama forms the lateral component. The anterolateral portion (squama) arises from the mesenchyme at 8 weeks of embryogenesis while the petromastoid portion develops later from a cartilaginous center at 6 months of fetal development. In certain people, it can contain an emissary vein, referred to as the petrosquamosal sinus. Being aware of this anatomic variant with preoperative CT scanning can be important to prevent bleeding in certain types of otolaryngological surgeries. Some authors have theorized that a persistent venous sinus reflects an arrest in embryologic development. (en)
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| - sutura petrosquamosa (en)
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