Electronic Resource
Initial stage of fetal development of the pharyngotympanic tube cartilage with special reference to muscle attachments to the tube
| العنوان: | Initial stage of fetal development of the pharyngotympanic tube cartilage with special reference to muscle attachments to the tube |
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| المؤلفون: | Katori, Yukio, Rodríguez Vázquez, José Francisco, Verdugo López, Samuel, Murakami, Gen, Kawase, Tetsuaki, Kobayashi, Toshimitsu |
| بيانات النشر: | ACB 2024-02-01T10:47:59Z 2024-02-01T10:47:59Z 2012-09 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Fetal development of the cartilage of the pharyngotympanic tube (PTT) is characterized by its late start. We examined semiserial histological sections of 20 human fetuses at 14-18 weeks of gestation. As controls, we also observed sections of 5 large fetuses at around 30 weeks. At and around 14 weeks, the tubal cartilage first appeared in the posterior side of the pharyngeal opening of the PTT. The levator veli palatini muscle used a mucosal fold containing the initial cartilage for its downward path to the palate. Moreover, the cartilage is a limited hard attachment for the muscle. Therefore, the PTT and its cartilage seemed to play a critical role in early development of levator veli muscle. In contrast, the cartilage developed so that it extended laterally, along a fascia-like structure that connected with the tensor tympani muscle. This muscle appeared to exert mechanical stress on the initial cartilage. The internal carotid artery was exposed to a loose tissue facing the tubal cartilage. In large fetuses, this loose tissue was occupied by an inferior extension of the temporal bone to cover the artery. This later-developing anterior wall of the carotid canal provided the final bony origin of the levator veli palatini muscle. The tubal cartilage seemed to determine the anterior and inferior margins of the canal. Consequently, the tubal cartilage development seemed to be accelerated by a surrounding muscle, and conversely, the cartilage was likely to determine the other muscular and bony structures. Depto. de Anatomía y Embriología Fac. de Medicina TRUE pub |
| مصطلحات الفهرس: | 611, 611.013, Human fetuses, Internal carotid artery, Levator veli palatini muscle, Pharyngotympanic tube cartilage, Tensor tympani muscle, Ciencias Biomédicas, 32 Ciencias Médicas, journal article, VoR |
| URL: | |
| الاتاحة: | Open access content. Open access content open access |
| ملاحظة: | application/pdf 2093-3665 English |
| Other Numbers: | ESRCM oai:docta.ucm.es:20.500.14352/97562 Katori Y, Rodríguez-Vázquez JF, Verdugo-López S, Murakami G, Kawase T, Kobayashi T. Initial stage of fetal development of the pharyngotympanic tube cartilage with special reference to muscle attachments to the tube. Anatomy & Cell Biology. 2012 Sep;45(3):185-92. 2093-3665 10.5115/acb.2012.45.3.185 23094207 1429624252 |
| المصدر المساهم: | REPOSITORIO E-PRINTS UNIVERSIDAD COMPLU From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1429624252 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |