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The development of human fetal hearing
Science (New York, N.Y.)
|November 4, 1983
Summary
Human fetuses show blink-startle responses to sound starting around 24 weeks. Consistent auditory responses develop by 28 weeks, aiding in prenatal diagnosis of hearing issues.
Area of Science:
- Fetal Development
- Auditory Neuroscience
- Prenatal Medicine
Background:
- Assessing fetal sensory development is crucial for understanding neurodevelopment.
- Auditory pathway maturation can be evaluated through response to stimuli.
Purpose of the Study:
- To determine the gestational age at which human fetuses exhibit blink-startle responses to vibroacoustic stimulation.
- To establish the developmental timeline of fetal auditory responses.
Main Methods:
- Ultrasonic monitoring of human fetuses.
- Application of vibroacoustic stimulation at specific gestational ages.
Main Results:
- Blink-startle responses were first observed between 24 and 25 weeks of gestational age.
- Consistent auditory responses were consistently present after 28 weeks of gestation.
Conclusions:
- The developmental sequence for fetal audition is established.
- This provides a basis for antenatal diagnosis of deafness and identification of abnormal fetal responses.