Treacher-Collins Syndrome Involves Defects

question 3

Multiple Choice

Treacher-Collins syndrome involves defects:

• A) Of the first and second branchial arches
• B) Of the third branchial arch
• C) Resulting in "cloverleaf" skull (kleeblattschädel)
• D) Resulting in brachycephaly or trigonocephaly

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Definitions:

Place Theory

A theory that proposes that our perception of sound depends on where each component frequency produces vibrations along the basilar membrane of the inner ear.

Low-Frequency Sounds

Sounds that have a frequency at the lower end of the audible range, typically below 250 Hz, often felt as vibrations more than they are heard.

High-Frequency Sounds

Sounds that have a high pitch, usually perceived as having a frequency over 2,000 Hz, which are often more difficult for certain populations, especially older adults, to hear.

Inattentional Blindness

A psychological lack of attention that is not associated with any vision defects, causing an individual to fail to perceive an unexpected stimulus.