Della Santina is one of a handful of researchers working to develop an implant that restores vestibular system function.

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Della Santina says it's like being a little disoriented, a little wobbly and a little seasick all the time.

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Della Santina, director of the Vestibular Neuroengineering Laboratory at Johns Hopkins University.

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Della Santina guesses there are 50, 000 in the U.S. with serious problems, and many more with less severe symptoms that could also benefit from treatment.

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Della Santina has built a vestibular prosthesis that he hopes can someday be implanted in humans much like cochlear implants are now used to restore hearing.

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"The best we can offer them now is having them practice looking at a spot on the wall while shaking their heads, " says Della Santina, who is also a doctor.

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"We have a very good sense of what sort of signal we need to deliver to give an animal or a person the sense they are spinning in a certain direction, " Della Santina says.

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