Anatomy Of External Auditory Canal

9 Questions | Total Attempts: 502

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This quiz is on the topic "Anatomy of external auditory canal. Please read up the topic from here.


Questions and Answers
  • 1. 
    Which of the following are features of external auditory canal?
    • A. 

      It is the only skin lined culdesac in the entire human body

    • B. 

      It performs both auditory and non auditory functions

    • C. 

      Performs auditory function only

    • D. 

      This canal is self cleansing in nature

  • 2. 
    The external auditory canal develops from the ____________.
    • A. 

      First branchial cleft

    • B. 

      Second branchial cleft

    • C. 

      Third branchial cleft

    • D. 

      Fourth branchial cleft

  • 3. 
    Embryological Primary meatus corresponds to
    • A. 

      Medial third of external auditory canal

    • B. 

      Complete external auditory canal

    • C. 

      Lateral third of external auditory canal

    • D. 

      Medial half of external auditory canal

  • 4. 
    External auditory canal is fully canalized by
    • A. 

      Third week of gestation

    • B. 

      12th week of gestation

    • C. 

      18 weeks of gestation

    • D. 

      28th week of gestation

  • 5. 
    Foramen Huschke is seen
    • A. 

      In the floor of external auditory canal

    • B. 

      Antero inferior portion of bony external auditory canal

    • C. 

      Roof of the external auditory canal

    • D. 

      Posterior wall of external auditory canal

  • 6. 
    Features of infant external auditory canal include
    • A. 

      At birth tympanic membrane and ossicles are of adult size

    • B. 

      Tympanic membrane and squamous portion of temporal bone forms the roof of external canal

    • C. 

      Tympanic rim is fused completely inferiorly

    • D. 

      The shape of the external canal in a neonate is nearly straight

  • 7. 
    The adult external auditory canal measures about
    • A. 

      5 cms

    • B. 

      8 cms

    • C. 

      1 cm

    • D. 

      2.5 cms

  • 8. 
    The following are anatomical features of external auditory canal
    • A. 

      It is divided into outer cartilagenous and inner bony portions

    • B. 

      Outer 2/3 is cartilagenous and inner 1/3 is bony

    • C. 

      Outer 1/3 is cartilagenous and inner 2/3 is bony

    • D. 

      Antero inferior wall is slightly longer than postero superior wall

    • E. 

      Bony canal is directed antero inferiorly

  • 9. 
    Narrowest portion of external canal is at its bony cartilagenous junction
    • A. 

      True

    • B. 

      False

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