Intermediate Semicircular Canals Quiz

Q1. Which two semicircular canals unite to form the common crus?

• Anterior and posterior canals
• Right and left lateral canals
• Posterior and lateral canals
• Anterior and lateral canals

Q2. How many openings do the three bony semicircular canals collectively make into the vestibule?

• Four
• Five
• Three
• Six

Q3. Which semicircular canal is approximately horizontal when the head is flexed forward about 30 degrees?

• Lateral semicircular canal
• Posterior semicircular canal
• Common crus
• Anterior semicircular canal

Q4. What is the immediate sensory consequence of cupular deflection?

• Contraction of the ampulla
• Opening of the oval window
• Bending of hair-cell stereocilia
• Movement of the auditory ossicles

Q5. Which statement correctly describes the normal cupula?

• Only the posterior cupula contains otoconia
• Only the lateral cupula contains otoconia
• It normally contains a dense otoconial layer
• It normally lacks otoconia

Q6. Where are the cell bodies of primary vestibular sensory neurons located?

• Spiral ganglion
• Geniculate ganglion
• Vestibular ganglion
• Trigeminal ganglion

Q7. Which vestibular nerve division generally supplies the anterior and lateral semicircular ducts?

• Inferior vestibular nerve
• Superior vestibular nerve
• Greater petrosal nerve
• Cochlear nerve

Q8. Which vestibular nerve division carries sensory fibers associated with the posterior semicircular duct?

• Auriculotemporal nerve
• Superior vestibular nerve
• Inferior vestibular nerve
• Facial nerve

Q9. How are the semicircular canals functionally organized across the two ears?

• As six canals in one plane
• As pairs only within each individual ear
• As completely independent canals
• As coplanar functional pairs

Q10. Which vertical canals form an approximate functional pair?

• The two posterior canals only
• An anterior canal on one side with the posterior canal on the opposite side
• The two anterior canals only
• The lateral and anterior canals of the same ear