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P300 auditory evoked potential latency in elderly.

Maria José Santos Cóser¹, Pedro Luis Cóser, Fleming Salvador Pedroso

¹HUSM, Universidade Federal de Santa Maria, Brasil.

Brazilian Journal of Otorhinolaryngology

|July 27, 2010

Summary

This summary is machine-generated.

P300 latency, a measure of auditory processing, increases with age in older adults. This study found a significant age-related increase of 2.85 ms per year in healthy elderly individuals.

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Area of Science:

Neuroscience
Audiology
Gerontology

Background:

Auditory cortical disorders in the elderly can be assessed using the P300.
There is a lack of contemporary reference values for P300 latency in healthy elderly populations.

Purpose of the Study:

To estimate the effect of age on P300 latency in a group of elderly individuals.
To establish normative P300 latency values for different age groups within the elderly population.

Main Methods:

A cross-sectional observational study involving 62 elderly patients.
Participants had pure tone thresholds up to 40 dB HL.
P300 latency was assessed in response to rare stimuli at 1000 Hz and 2000 Hz (80 dB HL), with participants divided into age groups: 60-64, 65-69, and 70-74 years.

Main Results:

P300 latency increased with age: 337.26 ms (60-64 yrs), 351.86 ms (65-69 yrs), and 370.19 ms (70-74 yrs).
Linear regression revealed a significant increase of 2.85 ms per year of age.
Statistical analysis confirmed the significance of the age-related increase in P300 latency.

Conclusions:

P300 latency shows a significant age-dependent increase in elderly individuals aged 60-74 years.
The rate of increase is approximately 2.85 ms per year, providing updated reference values for this demographic.