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Thursday February 9, 2012 10:16 pm
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The Sense of Sound |
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The ear is our organ of hearing and balance. Only vertebrates, or animals with backbones, have ears. We discuss the structure and function of our ears and the sense of sound.
Listen closely! |
Articles In This Section:
A Brain Map of Auditory Space
by Dr. Gary Farr 9/28/2003
At Caltech in the mid-1970s, Masakazu ("Mark") Konishi began studying the auditory system of barn owls in an effort to resolve a seemingly simple question: Why do we have two ears?
All About the Ears
by Dr. Gary Farr 9/28/2003
The ear is our organ of hearing and balance. Only vertebrates, or animals with backbones, have ears. We discuss the structure and function of our ears.
Bat Sounds and Human Speech
by Dr. Gary Farr 9/28/2003
Perhaps the finest achievement in sound processing is the ability to understand speech. Since this is a uniquely human trait, it would seem difficult to study in animals. Yet a researcher at Washington University in St. Louis believes it can be examined—by working with bats.
Free Newsletter
by Dr. Gary Farr 7/22/2003
Sign up for our FREE health newsletter from BecomeHealthyNow.com. The Healthy newsletter brings the latest research, news and ideas you can use, fun mini-quizzes and a listing of the live events and happenings on the BecomeHealthyNow sites and communities. You'll always be up to date on current health topics as the BecomeHealthyNow.com web site is continually updated.
Health Survey
by Dr. Gary Farr 7/22/2003
The health survey finds out about the state of your health. You may discover things about your health you didn't know before. This increased awareness of your health can help you take the appropriate action to improve the state of your body's function.
On the Trail of Deafness Genes
by Dr. Gary Farr 9/28/2003
Being able to hear speech is so taken for granted—"Is it possible for a hearing person to comprehend the enormity of its absence in someone else?" asks Hannah Merker in her poignant book Listening. "The silence around me is invisible...."
The Goal of Our Ears: Extreme Sensitivity and Speed
by Dr. Gary Farr 9/28/2003
Because of the hair cell bundles' uncanny resemblance to little antennae and their location in the inner ear, the cells had long been suspected of playing an important role in hearing. This view was bolstered by clinical evidence that the majority of hearing impairments—which affect some 30 million Americans—involve damage to hair cells.
The Quivering Bundles That Let Us Hear: Signals From a Hair Cell
by Dr. Gary Farr 9/28/2003
An unusual dance recital was videotaped in David Corey's lab at Massachusetts General Hospital recently. The star of the performance, magnified many times under a high-powered microscope, was a sound-receptor cell from the ear of a bullfrog, called a hair cell because of the distinctive tuft of fine bristles sprouting from its top.
The Value of Having Two Ears
by Dr. Gary Farr 9/28/2003
As a rapid stream of impulses arrives from the hair cells in the ear, the auditory system filters out a few simple, discrete aspects of complex sounds. Information about how high or low-pitched a sound is, how loud it is, and how often it is heard is then channeled along separate nerve pathways to higher-order processing centers in the brain, where millions of auditory neurons can compute the raw data into a recognizable sound pattern.
Tip Links Pull Up the Gates of Ion Channels
by Dr. Gary Farr 9/28/2003
Unlike other types of sensory receptor cells, hair cells do not rely on a cascade of chemical reactions to generate a signal. Photoreceptor cells in the eye, for instance, require a series of intricate interactions with a G protein and a second messenger before their ion channels close, sending a signal to the brain.
Archived Articles:
There are no archived articles.
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