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1. Cerumen is produced in the a. osseous external auditory canal b. entire external auditory canal c. concha d. cartilaginous external auditory canal 2. The complete absence of a pinna is called a. microtia b. atresia c. anotia d. hyperplasia 3. The following outer-ear disorders often result audiometrically in a conductive hearing loss except a. microtia of the pinna b. atresia of the external auditory canal c. external otitis d. tympanic membrane perforation 4. Microorganisms causing middle-ear infection may enter the middle space a. through the eustachian tube b. through the external auditory canal in the presence of a tympanic membrane perforation c. by the way of blood vessels carrying organisms from another part of the body d. all of the above 5. What is the name of the surgery for removal of middle-ear fluid? a. Myringotomy b. Myringoplasty c. Myringitis d. Otitis 6. What are the effects of stenosis? a. Hearing loss up to 60 dB b. No significant hearing loss c. Collection of dirt and debris in the ear canal d. b and c 7. In some cases testing hearing with supra-aural earphones causes the appearance of air-bone gaps when there is no actual conductive hearing loss present. This may be caused by a. collapse of the cartilaginous external auditory canal b. the earphone pushing earwax against the tympanic membrane c. contraction of the tensor tympani muscle d. contraction of the stapedius muscle ANSWERS BELOW 1. Cerumen is produced in the a. osseous external auditory canal b. entire external auditory canal c. concha d. cartilaginous external auditory canal 2. The complete absence of a pinna is called a. microtia b. atresia c. anotia d. hyperplasia 3. The following outer-ear disorders often result in a conductive hearing loss except a. microtia of the pinna b. atresia of the external auditory canal c. external otitis d. tympanic membrane perforation 4. Microorganisms causing middle-ear infection may enter the middle space a. through the eustachian tube b. through the external auditory canal in the presence of a tympanic membrane perforation c. by the way of blood vessels carrying organisms from another part of the body d. all of the above 5. What is the name of the surgery for removal of middle-ear fluid? a. Myringotomy b. Myringoplasty c. Myringitis d. Otitis 6. What are the effects of stenosis? a. Hearing loss up to 60 dB b. No significant hearing loss c. Collection of dirt and debris in the ear canal d. b and c 7. In some cases testing hearing with supra-aural earphones causes the appearance of air-bone gaps when there is no actual conductive hearing loss present. This may be caused by a. Collapse of the cartilaginous external auditory canal (BC thresholds are not affected, while AC thresholds are poorer) b. The earphone pushing earwax against the tympanic membrane c. Contraction of the tensor tympani muscle d. Contraction of the stapedius muscle
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