Audiology: Diagnostic Assessment

The Bekesy audiograms are described primarily based on _________.

a). continous tone tracing

b). sweep-frequency pattern

c). fixed-frequency pattern

d). pulsed or interrupted tone tracing

Correct answer: b

Anatomy of Ear: Auricle

How many intrinsic muscles are found in the auricle _____?

a). three
b). nine
c). six
d). ten
e). four

correct answer: c

The intrinsic muscles of auricle are:

1. The Helicis major is a narrow vertical band located on the anterior margin of the helix. It arises from the spina helicis, and is inserted into the anterior border of the helix.

2. The Helicis minor is an oblique bundle and covers crus helicis.

3. The Tragicus is a short, flattened vertical band on the lateral surface of the tragus.

4. The Antitragicus from the outer part of the antitragus, and is inserted into the cauda helicis and antihelix.

5. The Transversus auriculae is placed on the cranial surface of the pinna. It consists of scattered fibers, extending from the eminentia conchæ to the prominence corresponding with the scapha.

6. The Obligus auriculae is found on the cranial surface, extending from the upper and back part of the concha to the convexity immediately above it.