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Navigation Labs Affiliated Labs Auditory Neuroscience and Speech Recognition Lab (Dr. Lee Miller) People Publications Functional connectivity of cortical networks involved in bimanual motor sequence learning. The contribution of spike threshold to acoustic feature selectivity, spike information content, and information throughput. Measuring temporal dynamics of functional networks using phase spectrum of fMRI data. Perceptual fusion and stimulus coincidence in the cross-modal integration of speech. Functional interactions between oculomotor regions during prosaccades and antisaccades. Auditory thalamocortical transformation: structure and function. Coherence between fMRI time-series distinguishes two spatial working memory networks. Measuring interregional functional connectivity using coherence and partial coherence analyses of fMRI data. Naturalistic auditory contrast improves spectrotemporal coding in the cat inferior colliculus. Spectrotemporal receptive fields in the lemniscal auditory thalamus and cortex. Sensitivity of EEG and MEG to the N1 and P2 auditory evoked responses modulated by spectral complexity of sounds Participate Positions Research and Facilities CMB Cluster Tutorial Courses 267 Cousteau Place Davis, CA 95618 (530) 297-4651 phone (530) 297-4400 fax Quick links University Library MyUCDavis Search the CMB

Center for Mind and Brain > Labs > Auditory Neuroscience and Speech Recognition Lab (Dr. Lee Miller) > Publications > Sensitivity of EEG and MEG to the N1 and P2 auditory evoked responses modulated by spectral complexity of sounds Personal tools Log in Antoine J Shahin, Larry E Roberts, Lee M Miller, Kelly L McDonald, and Claude Alain (2007) Sensitivity of EEG and MEG to the N1 and P2 auditory evoked responses modulated by spectral complexity of sounds Brain Topogr 20(2):55-61. Abstract Acoustic complexity of a stimulus has been shown to modulate the electromagnetic N1 (latency approximately 110 ms) and P2 (latency 190 ms) auditory evoked responses. We compared the relative sensitivity of electroencephalography (EEG) and magnetoencephalography (MEG) to these neural correlates of sensation. Simultaneous EEG and MEG were recorded while participants listened to three variants of a piano tone. The piano stimuli differed in their number of harmonics: the fundamental frequency (f ( 0 )), only, or f ( 0 ) and the first two or eight harmonics. The root mean square (RMS) of the amplitude of P2 but not N1 increased with spectral complexity of the piano tones in EEG and MEG. The RMS increase for P2 was more prominent in EEG than MEG, suggesting important radial sources contributing to the P2 only in EEG. Source analysis revealing contributions from radial and tangential sources was conducted to test this hypothesis. Source waveforms revealed a significant increase in the P2 radial source amplitude in EEG with increased spectral complexity of piano tones. The P2 of the tangential source waveforms also increased in amplitude with increased spectral complexity in EEG and MEG. The P2 auditory evoked response is thus represented by both tangential (gyri) and radial (sulci) activities. The radial contribution is expressed preferentially in EEG, highlighting the importance of combining EEG with MEG where complex source configurations are suspected. URL http://www.springerlink.com/content/7648pn2878n17965/   Link to PubMed entry