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Related Experiment Videos

Auditory sensory memory and the aging brain: A mismatch negativity study.

Rowena J Cooper1, Juanita Todd, Katherine McGill

  • 1Functional Neuroimaging Laboratory, School of Behavioural Sciences, University of Newcastle, University Drive, Callaghan, 2308NSW, Australia. Rowena.Cooper@newcastle.edu.au

Neurobiology of Aging
|May 24, 2005
PubMed
Summary

Elderly individuals show reduced auditory sensory memory (ASM) function compared to younger adults. This age-related deficit impacts both encoding and potentially retention of sound information, as measured by mismatch negativity (MMN).

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Gerontology

Background:

  • Auditory sensory memory (ASM) is crucial for processing sound information.
  • Mismatch negativity (MMN), an auditory event-related potential, assesses auditory sensory memory.
  • Normal aging may affect auditory sensory memory function.

Purpose of the Study:

  • To investigate age-related differences in auditory sensory memory (ASM) encoding and retention.
  • To examine how deviant tone type (duration, frequency) and stimulus-onset asynchrony (SOA) influence MMN in aging.

Main Methods:

  • Compared MMN responses in elderly (mean age 69) and young (mean age 21) adults.
  • Manipulated deviant tone type (duration, frequency) and SOA (450 ms, 3 s).
  • Measured MMN at Fz and mastoid sites.

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Main Results:

  • Elderly participants exhibited smaller and delayed MMN responses compared to young participants.
  • This effect was consistent across different deviant types and SOAs at Fz.
  • MMN reversal at mastoids suggested potential age-related deficits in information retention within ASM.

Conclusions:

  • Findings suggest an age-related deficit in encoding sound properties in auditory sensory memory.
  • Evidence indicates a possible additional age-related deficit in the retention of auditory information.
  • MMN is a valuable tool for assessing age-related changes in auditory sensory memory.