10 Questions
What is the most common inner ear developmental anomaly?
Enlarged vestibular aqueduct
Which of the following is a contraindication for stapedectomy?
Internal auditory canal abnormalities
What can a narrow IAC with normal CN7 indicate?
Undeveloped CN8
Which genes influence ear and middle ear development?
HoxA2 and PACT
Where does ear auricle development come from?
First and second branchial arch
Where does the middle ear cavity come from?
First pharyngeal pouch
Where do almost all ossicles come from?
Neural crest mesenchyme of the first and second branchial arch
What is a rare inner ear developmental anomaly?
Cochlear aqueduct abnormalities
What hindbrain segmentation genes are related to inner ear development?
Hoxa1 and Pax2
When is the development of the membranous labyrinth completed?
20th week of gestation
Study Notes
- Enlarged vestibular aqueduct is the most common inner ear developmental anomaly.
- Cochlear aqueduct abnormalities are rare.
- Internal auditory canal abnormalities can be a contraindication for stapedectomy.
- Narrow IAC with normal CN7 can indicate undeveloped CN8 and is a contraindication for CI.
- Ear and middle ear development are influenced by genes such as HoxA2 and PACT.
- Inner ear development is related to hindbrain segmentation genes such as Hoxa1 and Pax2.
- Ear auricle development comes from the first and second branchial arch.
- Middle ear cavity comes from the first pharyngeal pouch.
- Almost all ossicles come from neural crest mesenchyme of the first and second branchial arch.
- The development of the membranous labyrinth is completed by the 20th week of gestation.
Test your knowledge of inner and outer ear development with this informative quiz! From the role of HoxA2 and Pax2 in inner ear development to the origin of the ear auricle, this quiz covers a range of topics related to ear development. Whether you're a medical student or simply curious about the fascinating process of ear development, this quiz will challenge and educate you. So put on your thinking cap and see how much you know about the development of the human ear!
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