Developments in Switching

Kaskey, B.

doi:10.1016/b978-0-12-467401-1.50011-7

Cited by 1 publication

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After much early debate about the form of the input-output function the con sensus is that the increase is roughly linear in microvolts per decibel, with a tendency to saturate or even reverse at high levels [4,22,51,52], The saturation level may decrease at short interstimulus intervals and the higher the stimulus frequency, but reports arc incon sistent [47,[50][51][52][53][54][55][56]. It is clear that the intensi ty-amplitude functions differ for N1 and P2 [57.…”

Section: Envelopementioning

confidence: 99%

The N1 Response and Its Applications

Hyde¹

1997

Audiol Neurotol

195

165

View full text Add to dashboard Cite

Some properties and applications of the N1-P2 complex (100-200 ms latency) are reviewed. N1-P2 is currently the auditory-evoked potential (AEP) of choice for estimating the pure-tone audiogram in certain subjects for whom a frequency-specific, non-behavioural measure is required. It is accurate in passively cooperative and alert older children and adults. Although generally underutilized, it is an excellent tool for assessment of functional hearing loss, and in medicolegal and industrial injury compensation claimants. Successful use of N1-P2 requires substantial tester training and skill, as well as carefully designed and efficient measurement protocols. N1-P2 reflects conscious detection of any discrete change in any subjective dimension of the auditory environment. In principle, it could be used to measure almost any threshold of discriminable change, such as in pitch, loudness, quality and source location. It is established as a physiologic correlate of phenomena such as the masking level difference. Thus, N1-P2 may have many applications as an ObjectiveÊº proxy for psychoacoustic measures that may be impractical in clinical subjects. Advances in dipole source localization and in auditory-evoked magnetic fields (AEMFs) have clarified the multiple, cortical origins of Nl and P2. These potentials are promising tools for the neuro-physiologic characterization of many disorders of central auditory processing and of speech and language development. They also may be useful in direct “functional imaging’ of specific brain regions. A wide variety of potential research and clinical applications of N1 and P2, and considerable value as part of an integrated, goal- directed AEP/AEMF measurement scheme, have yet to be fully realized.

show abstract