NDLI: Source Analysis of Event-Related Potentials During Pitch Discrimination and Pitch Memory Tasks

Content Provider	Springer Nature Link
Author	Talja, Suvi Alho, Kimmo Rinne, Teemu
Copyright Year	2013
Abstract	Our previous studies using fMRI have demonstrated that activations in human auditory cortex (AC) are strongly dependent on the characteristics of the task. The present study tested whether source estimation of scalp-recorded event-related potentials (ERPs) can be used to investigate task-dependent AC activations. Subjects were presented with frequency-varying two-part tones during pitch discrimination, pitch n-back memory, and visual tasks identical to our previous fMRI study (Rinne et al., J Neurosci 29:13338–13343, 2009). ERPs and their minimum-norm source estimates in AC were strongly modulated by task at 200–700 ms from tone onset. As in the fMRI study, the pitch discrimination and pitch memory tasks were associated with distinct AC activation patterns. In the pitch discrimination task, increased activity in the anterior AC was detected relatively late at 300–700 ms from tone onset. Therefore, this activity was probably not associated with enhanced pitch processing but rather with the actual discrimination process (comparison between the two parts of tone). Increased activity in more posterior areas associated with the pitch memory task, in turn, occurred at 200–700 ms suggesting that this activity was related to operations on pitch categories after pitch analysis was completed. Finally, decreased activity associated with the pitch memory task occurred at 150–300 ms consistent with the notion that, in the demanding pitch memory task, spectrotemporal analysis is actively halted as soon as category information has been obtained. These results demonstrate that ERP source analysis can be used to complement fMRI to investigate task-dependent activations of human AC.
Starting Page	445
Ending Page	458
Page Count	14
File Format	PDF
ISSN	08960267
Journal	Brain Topography
Volume Number	28
Issue Number	3
e-ISSN	15736792
Language	English
Publisher	Springer US
Publisher Date	2013-09-17
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Event-related potentials Auditory cortex Human Attention Pitch Neurosciences Psychiatry Neurology
Content Type	Text
Resource Type	Article
Subject	Neurology Anatomy Radiology, Nuclear Medicine and Imaging Neurology (clinical) Radiological and Ultrasound Technology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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