Embryology of the Skull
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Questions and Answers

Which process involves chondrocytes creating a cartilaginous model that is later replaced by osteoblasts with bone?

  • Mesenchymal condensation
  • Intramembranous ossification
  • Endochondral ossification (correct)
  • Cranial chondrification
  • Which type of ossification occurs mostly in the skull and part of the clavicles?

  • Intramembranous ossification (correct)
  • Neurocranial ossification
  • Endochondral ossification
  • Visceral ossification
  • Which part of the skull undergoes ossification directly from mesenchyme along the sides and top of the brain, forming the flat bones of the calvaria?

  • Parietal bones (correct)
  • Frontal bones
  • Maxilla bone
  • Ethmoid bone
  • Which type of ossification involves bones separating from each other by fibrous joints known as cranial sutures?

    <p>Endochondral ossification</p> Signup and view all the answers

    What is the term for the fibrous areas in neonates that allow for neurocranial bones to move during birth and close by age 2?

    <p>Fontanelles</p> Signup and view all the answers

    Which of the following bones encloses the brain and is part of the neurocranium?

    <p>Sphenoid bone</p> Signup and view all the answers

    Intramembranous ossification contributes to the formation of which part of the skull?

    <p>Frontal bone</p> Signup and view all the answers

    Which of the following is a function of fontanelles in the neonate?

    <p>Allowing for expansion of the skull during birth</p> Signup and view all the answers

    Which pharyngeal arch gives rise to the maxilla and zygomatic bone in the viscerocranium?

    <p>First pharyngeal arch</p> Signup and view all the answers

    Improper development in head and neck structures can lead to adult malformations known as ____________.

    <p>Cleft lip and palate</p> Signup and view all the answers

    Which process involves the formation of neurocranial bones by the replacement of cartilage with bone tissue?

    <p>Endochondral ossification</p> Signup and view all the answers

    Which part of the skull is derived from pharyngeal arches and contains special sensory organs for sight, smell, and taste?

    <p>Facial skeleton</p> Signup and view all the answers

    Which structure in the neonate allows for the movement of neurocranial bones during birth and closes by about age 2?

    <p>Fontanelles</p> Signup and view all the answers

    Which type of ossification contributes to the formation of flat bones of the calvaria in the skull?

    <p>Intramembranous ossification</p> Signup and view all the answers

    Improper development in head and neck structures can lead to adult malformations known as ____________.

    <p>Craniofacial anomalies</p> Signup and view all the answers

    In craniofacial development, which type of ossification involves mesenchyme forming a membranous sheath and osteoblasts forming bone within these sheaths?

    <p>Intramembranous ossification</p> Signup and view all the answers

    Which structure in the adult skull forms the cranial base and undergoes endochondral ossification during development?

    <p>Sphenoid bone</p> Signup and view all the answers

    During skull development, which part undergoes ossification directly from mesenchyme along the sides and top of the brain, forming the flat bones of the calvaria (skull cap)?

    <p>Parietal bone</p> Signup and view all the answers

    Which type of ossification involves chondrocytes creating a cartilaginous model that is later replaced by osteoblasts with bone, contributing to most of the postcrania and parts of the skull?

    <p>Endochondral ossification</p> Signup and view all the answers

    Improper development in head and neck structures can lead to adult malformations known as:

    <p>Craniosynostosis</p> Signup and view all the answers

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