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Neuromagnetic brain activities associated with perceptual categorization and sound-content incongruency: a comparison between monosyllabic words and pitch names.

Tsai CG, Chen CC, Wen YC, Chou TL - Front Hum Neurosci (2015)

Bottom Line: Congruency effects of musical stimuli revealed that pitch categorization and semantic processing of pitch information were associated with P2m and N400m, respectively.For verbal stimuli, P2m and N400m did not show any congruency effect.In both the pitch-semantic task and the voice-semantic task, we found that incongruent stimuli evoked stronger slow waves with the latency of 500-600 ms than congruent stimuli.

View Article: PubMed Central - PubMed

Affiliation: Graduate Institute of Musicology, National Taiwan University Taipei, Taiwan ; Neurobiology and Cognitive Science Center, National Taiwan University Taipei, Taiwan.

ABSTRACT
In human cultures, the perceptual categorization of musical pitches relies on pitch-naming systems. A sung pitch name concurrently holds the information of fundamental frequency and pitch name. These two aspects may be either congruent or incongruent with regard to pitch categorization. The present study aimed to compare the neuromagnetic responses to musical and verbal stimuli for congruency judgments, for example a congruent pair for the pitch C4 sung with the pitch name do in a C-major context (the pitch-semantic task) or for the meaning of a word to match the speaker's identity (the voice-semantic task). Both the behavioral data and neuromagnetic data showed that congruency detection of the speaker's identity and word meaning was slower than that of the pitch and pitch name. Congruency effects of musical stimuli revealed that pitch categorization and semantic processing of pitch information were associated with P2m and N400m, respectively. For verbal stimuli, P2m and N400m did not show any congruency effect. In both the pitch-semantic task and the voice-semantic task, we found that incongruent stimuli evoked stronger slow waves with the latency of 500-600 ms than congruent stimuli. These findings shed new light on the neural mechanisms underlying pitch-naming processes.

No MeSH data available.


Related in: MedlinePlus

Locations of regions of interests (ROIs) on (1) the right temporoparietal region, and (2) left temporoparietal region.
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Figure 1: Locations of regions of interests (ROIs) on (1) the right temporoparietal region, and (2) left temporoparietal region.

Mentions: On the basis of previous studies (Itoh et al., 2005; Steinbeis and Koelsch, 2008), we focused on three components of the evoked magnetic fields: P2m, N400m, and SWm. Neuromagnetic responses recorded in temporoparietal channels were evaluated using an ROI analysis. These channels were selected due to their role in auditory categorization based on previous studies (Shahin et al., 2003; Kuriki et al., 2006; Thaerig et al., 2008; Tong et al., 2009; Liebenthal et al., 2010; Rueschemeyer et al., 2014). The ROIs were defined as the pronounced evoked fields in the average topographies for P2m (Figure 1). For each participant, we selected the three channels from the ROIs that recorded strongest P2m. Time courses of the MEG signal in these spatial ROIs were obtained by averaging the waveforms of the event-related field within the epoch of 0–600 ms over these three channels.


Neuromagnetic brain activities associated with perceptual categorization and sound-content incongruency: a comparison between monosyllabic words and pitch names.

Tsai CG, Chen CC, Wen YC, Chou TL - Front Hum Neurosci (2015)

Locations of regions of interests (ROIs) on (1) the right temporoparietal region, and (2) left temporoparietal region.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4538295&req=5

Figure 1: Locations of regions of interests (ROIs) on (1) the right temporoparietal region, and (2) left temporoparietal region.
Mentions: On the basis of previous studies (Itoh et al., 2005; Steinbeis and Koelsch, 2008), we focused on three components of the evoked magnetic fields: P2m, N400m, and SWm. Neuromagnetic responses recorded in temporoparietal channels were evaluated using an ROI analysis. These channels were selected due to their role in auditory categorization based on previous studies (Shahin et al., 2003; Kuriki et al., 2006; Thaerig et al., 2008; Tong et al., 2009; Liebenthal et al., 2010; Rueschemeyer et al., 2014). The ROIs were defined as the pronounced evoked fields in the average topographies for P2m (Figure 1). For each participant, we selected the three channels from the ROIs that recorded strongest P2m. Time courses of the MEG signal in these spatial ROIs were obtained by averaging the waveforms of the event-related field within the epoch of 0–600 ms over these three channels.

Bottom Line: Congruency effects of musical stimuli revealed that pitch categorization and semantic processing of pitch information were associated with P2m and N400m, respectively.For verbal stimuli, P2m and N400m did not show any congruency effect.In both the pitch-semantic task and the voice-semantic task, we found that incongruent stimuli evoked stronger slow waves with the latency of 500-600 ms than congruent stimuli.

View Article: PubMed Central - PubMed

Affiliation: Graduate Institute of Musicology, National Taiwan University Taipei, Taiwan ; Neurobiology and Cognitive Science Center, National Taiwan University Taipei, Taiwan.

ABSTRACT
In human cultures, the perceptual categorization of musical pitches relies on pitch-naming systems. A sung pitch name concurrently holds the information of fundamental frequency and pitch name. These two aspects may be either congruent or incongruent with regard to pitch categorization. The present study aimed to compare the neuromagnetic responses to musical and verbal stimuli for congruency judgments, for example a congruent pair for the pitch C4 sung with the pitch name do in a C-major context (the pitch-semantic task) or for the meaning of a word to match the speaker's identity (the voice-semantic task). Both the behavioral data and neuromagnetic data showed that congruency detection of the speaker's identity and word meaning was slower than that of the pitch and pitch name. Congruency effects of musical stimuli revealed that pitch categorization and semantic processing of pitch information were associated with P2m and N400m, respectively. For verbal stimuli, P2m and N400m did not show any congruency effect. In both the pitch-semantic task and the voice-semantic task, we found that incongruent stimuli evoked stronger slow waves with the latency of 500-600 ms than congruent stimuli. These findings shed new light on the neural mechanisms underlying pitch-naming processes.

No MeSH data available.


Related in: MedlinePlus