Cleft Lip and Palate Etiology and Development
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Questions and Answers

During which weeks of pregnancy does the lip form?

  • 1st and 2nd weeks
  • 10th and 12th weeks
  • 6th and 9th weeks
  • 4th and 7th weeks (correct)
  • Which failure of fusion leads to the formation of the primary palate?

  • Lateral palatine shelf with nasal septum
  • Intermaxillary segment with maxillary process (correct)
  • Two lateral palatine shelves
  • Lateral palatine shelf with maxillary process
  • At what stage is cleft lip typically detected on ultrasound?

  • 20th week of pregnancy
  • 6th week of pregnancy
  • 27th week of pregnancy
  • 13th week of pregnancy (correct)
  • What is the cause of cleft palate?

    <p>Failure of lateral palatine shelves to fuse</p> Signup and view all the answers

    Which structure is affected by a cleft palate?

    <p>Roof of the mouth (palate)</p> Signup and view all the answers

    What are some common issues associated with cleft lip?

    <p><strong>Speech issues</strong>, <strong>feeding issues</strong>, <strong>oral hygiene issues</strong></p> Signup and view all the answers

    In which stage of pregnancy is the roof of the mouth (palate) formed?

    <p><strong>6th and 9th weeks</strong></p> Signup and view all the answers

    What structures are formed by the first pharyngeal pouch?

    <p>Portions of the inner ear</p> Signup and view all the answers

    Which cranial nerve is responsible for sensation in the first pharyngeal arch?

    <p>CN V-5</p> Signup and view all the answers

    Which gland is formed from the ventral part of the third pharyngeal pouch?

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

    What is the main cause of Treacher Collins Syndrome?

    <p>Failure of neural crest cell migration</p> Signup and view all the answers

    Which cranial nerve is associated with taste in the second pharyngeal arch?

    <p>CN VII-7</p> Signup and view all the answers

    In Treacher Collins Syndrome, which of the following facial bones are typically underdeveloped?

    <p>Mandible and jaw</p> Signup and view all the answers

    Which glandular structure is formed by the ultimobranchial body from the fourth pharyngeal pouch?

    <p>Calcitonin-producing C-cells</p> Signup and view all the answers

    Which of the following is a classic triad associated with DiGeorge Syndrome?

    <p>Loss of thymus, loss of parathyroid glands, congenital heart defects</p> Signup and view all the answers

    Which pharyngeal pouches are affected in Arytenoid DiGeorge Syndrome?

    <p>3rd and 4th pharyngeal pouches</p> Signup and view all the answers

    Which structure is derived from the 1st pharyngeal cleft?

    <p>External auditory meatus</p> Signup and view all the answers

    A mass located below the angle of the mandible and anterior to the sternocleidomastoid muscle is most likely a result of which condition?

    <p>Branchial cleft cyst</p> Signup and view all the answers

    Which craniofacial malformation is considered the most common?

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

    What is a distinguishing feature between a Branchial cleft cyst and a thyroglossal duct cyst?

    <p>Ability to move with swallowing</p> Signup and view all the answers

    Which cranial nerve is primarily involved in innervating the muscles of mastication?

    <p>Cranial Nerve V (Trigeminal)</p> Signup and view all the answers

    Which embryonic structure is key for the development of the head and neck?

    <p>Pharyngeal arches</p> Signup and view all the answers

    From which pharyngeal arch does the Mandibular Process give rise to the Mandible?

    <p>1st arch</p> Signup and view all the answers

    Which nerve is associated with the development of the Muscles of Mastication?

    <p>CN V (5)</p> Signup and view all the answers

    Which structure is derived from Reichert’s Cartilage of the 2nd Arch?

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

    The Posterior Digastric muscle is innervated by which cranial nerve?

    <p>CN VII (7)</p> Signup and view all the answers

    Which embryonic vessel is involuted in development and does not persist into adulthood?

    <p>Stapedial Artery</p> Signup and view all the answers

    Which pharyngeal arch gives rise to the Laryngeal muscles?

    <p>4th Arch</p> Signup and view all the answers

    'Treacher Collins Syndrome' mainly affects which structures in the head and neck?

    <p>'1st Arch: forms the face' statement</p> Signup and view all the answers

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