Chapter 21: Cochlear Implants

The first cochlear implant was performed in what year?

The FDA approved CIs for general surgery in what year?

As of 2008, how many CIs have been performed world wide?

Which ganglion cells better survive acoustic trauma?

It has been estimated that the human needs _____ ganglion cells to have good speech discrimination.

Of the 10,000 ganglion cells necessary to have good speech discrimination, how many must be apical?

Formant frequencies are maximum frequencies based upon the vocal tract.

F0 is the fundamental frequency.

Which formant frequencies contribute to the identification of higher frequency speech sounds?

Which formant frequencies contribute to vowel identification?

It is a medical indication that a person with bilateral severe-to-profound HL [70 dB or greater] can still receive benefit from hearing instruments.

The older the adult the less likely the medical community will recommend CIs.

For children, CIs are not indicated when parents are unmotivated.

Contraindications for CI may include the following:

The complication reate for posoperative management of CI is _____%.

One likely postoperative complication may be:

The shorter the UHL interval, the higher the _____ with CIs.

CIs result in _____ improvement.

The current percentage of bilateral CIs is _____ as of 2008.