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Logarithmic laws of echoic memory and auditory change detection in humans

Koji Inui¹, Tomokazu Urakawa², Koya Yamashiro¹, Naofumi Otsuru³, Yasuyuki Takeshima³ & Ryusuke Kakigi⁴

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1. National Institute for Physiological Sciences, Department of Integrative Physiology
2. Dept of Integrative Physiology, National Inst of Physiological
3. NIPS
4. National Institute for Physiological Sciences, Integrative Physiology

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Manuscript

Date:

Received 19 August 2009 01:39 UTC; Posted 19 August 2009

Subjects:

Neuroscience

Tags:

• memory
• electrophysiology
• MMN

Abstract:

The cortical mechanisms underlying echoic memory and change detection were investigated using an auditory change-related component (N100c) of event-related brain potentials. N100c was elicited by paired sound stimuli, a standard followed by a deviant, while subjects watched a silent movie. The amplitude of N100c elicited by a fixed sound pressure deviance (70 dB vs. 75 dB) was negatively correlated with the logarithm of the interval between the standard sound and deviant sound (1 ~ 1000 ms), while positively correlated with the logarithm of the duration of the standard sound (25 ~ 1000 ms), indicating that the temporal representation of echoic memory is logarithmic. The amplitude of N100c elicited by a deviance in sound pressure, sound frequency and sound location was correlated with the logarithm of the magnitude of physical differences between the standard and deviant sounds, suggesting that Weber-Fechner's law holds for the automatic cortical response to sound changes.

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This document is licensed to the public under the Creative Commons Attribution 3.0 License

How to cite this document:

Inui, Koji, Urakawa, Tomokazu, Yamashiro, Koya, Otsuru, Naofumi, Takeshima, Yasuyuki, and Kakigi, Ryusuke. Logarithmic laws of echoic memory and auditory change detection in humans. Available from Nature Precedings <http://hdl.handle.net/10101/npre.2009.3652.1> (2009)

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