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mandibular foramen การใช้

ประโยคมือถือ
  • The mandibular foramen of basilosaurids covered the entire depth of the lower jaw as in modern cetaceans.
  • In modern toothed whales, this fat pad in the mandibular foramen extends posteriorly to the middle ear.
  • The mandibular foramen in ambulocetids had increased in size, which indicates that a fat pad was likely to be housed in the lower jaw.
  • Other distinguishing features include a post-mandibular foramen, more posterior positioning of the orbit, and orientation of lacrimal and infraorbital foramina relative to the molars.
  • Rarely, a bifid inferior alveolar nerve may be present, in which case a second mandibular foramen, more inferiorly placed, exists and can be detected by noting a doubled mandibular canal on a radiograph.
  • Its fibers pass downward, lateral, and posterior, and are inserted, by a strong tendinous lamina, into the lower and back part of the medial surface of the mandible, as high as the mandibular foramen.
  • This effectively produces an evolute which can be termed the resultant axis of mandibular rotation, which lies in the vicinity of the mandibular foramen, allowing for a low-tension environment for the vasculature and innervation of the mandible.
  • Frayer " et al " . ( 1993 ) consider there to be at least 4 features in combination that are unique to the European fossil record : a horizontal-oval shaped mandibular foramen, anterior mastoid tubercle, suprainiac fossa and narrowing of the nasal breadth associated with tooth-size reduction.
  • Mylohyoid : by its own nerve, a branch of the inferior alveolar ( from the mandibular division of trigemminal nerve ), which arises just before the parent nerve enters the mandibular foramen, pierces the sphenomandibular ligament, and runs forward on the inferior surface of the mylohyoid, supplying it and the anterior belly of the digastric.