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Age-related dissociation of sensory and decision-based auditory motion processing.

Ludwig AA, Rübsamen R, Dörrscheidt GJ, Kotz SA - Front Hum Neurosci (2012)

Bottom Line: In contrast, pronounced MMNs for both deviant sizes were found in children.The lack of MMN deviance dependency in children suggests that unlike in teenagers and adults, neural signatures of automatic auditory motion processing do not mirror discrimination abilities.The study critically accounts for advanced understanding of children's central auditory development.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig Leipzig, Germany.

ABSTRACT
Studies on the maturation of auditory motion processing in children have yielded inconsistent reports. The present study combines subjective and objective measurements to investigate how the auditory perceptual abilities of children change during development and whether these changes are paralleled by changes in the event-related brain potential (ERP). We employed the mismatch negativity (MMN) to determine maturational changes in the discrimination of interaural time differences (ITDs) that generate lateralized moving auditory percepts. MMNs were elicited in children, teenagers, and adults, using a small and a large ITD at stimulus offset with respect to each subject's discrimination threshold. In adults and teenagers large deviants elicited prominent MMNs, whereas small deviants at the behavioral threshold elicited only a marginal or no MMN. In contrast, pronounced MMNs for both deviant sizes were found in children. Behaviorally, however, most of the children showed higher discrimination thresholds than teens and adults. Although automatic ITD detection is functional, active discrimination is still limited in children. The lack of MMN deviance dependency in children suggests that unlike in teenagers and adults, neural signatures of automatic auditory motion processing do not mirror discrimination abilities. The study critically accounts for advanced understanding of children's central auditory development.

No MeSH data available.


Small deviant—ERPs and difference waves. Event-related potentials elicited by the ITDoff signal used as deviant (dark gray line) and as standard (light gray line) as well as the respective difference waves (black line) in (A) children, (B) teens, and (C) adults, respectively (cf. Figure 2). MMN was significant only for the children group.
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Figure 3: Small deviant—ERPs and difference waves. Event-related potentials elicited by the ITDoff signal used as deviant (dark gray line) and as standard (light gray line) as well as the respective difference waves (black line) in (A) children, (B) teens, and (C) adults, respectively (cf. Figure 2). MMN was significant only for the children group.

Mentions: Figure 3 shows the ERPs and difference waves elicited by the ITDoff signal as deviant and the ITDoff signal as standard in A [children], B [teens], and C [adults], respectively, for the small contrast. In adults, no significant MMNs were elicited by small ITDoff deviants inducing perception of motion to the left or to the right (Figure 3C). The small negativities, encountered at electrodes F3 and F4 (motion to the right), did not reach statistical significance (Table 3). In teens, MMN reached significance only for perceived motion to the left over right hemisphere scalp locations (Figure 3B, solid lines). No MMN was evoked at all other electrodes. However, in 6/7-year-old children, clearly discernable and prominent MMNs were elicited by small deviants in both stimulus conditions, and reached significance over both hemispheres (Figure 3A, Table 3).


Age-related dissociation of sensory and decision-based auditory motion processing.

Ludwig AA, Rübsamen R, Dörrscheidt GJ, Kotz SA - Front Hum Neurosci (2012)

Small deviant—ERPs and difference waves. Event-related potentials elicited by the ITDoff signal used as deviant (dark gray line) and as standard (light gray line) as well as the respective difference waves (black line) in (A) children, (B) teens, and (C) adults, respectively (cf. Figure 2). MMN was significant only for the children group.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3313480&req=5

Figure 3: Small deviant—ERPs and difference waves. Event-related potentials elicited by the ITDoff signal used as deviant (dark gray line) and as standard (light gray line) as well as the respective difference waves (black line) in (A) children, (B) teens, and (C) adults, respectively (cf. Figure 2). MMN was significant only for the children group.
Mentions: Figure 3 shows the ERPs and difference waves elicited by the ITDoff signal as deviant and the ITDoff signal as standard in A [children], B [teens], and C [adults], respectively, for the small contrast. In adults, no significant MMNs were elicited by small ITDoff deviants inducing perception of motion to the left or to the right (Figure 3C). The small negativities, encountered at electrodes F3 and F4 (motion to the right), did not reach statistical significance (Table 3). In teens, MMN reached significance only for perceived motion to the left over right hemisphere scalp locations (Figure 3B, solid lines). No MMN was evoked at all other electrodes. However, in 6/7-year-old children, clearly discernable and prominent MMNs were elicited by small deviants in both stimulus conditions, and reached significance over both hemispheres (Figure 3A, Table 3).

Bottom Line: In contrast, pronounced MMNs for both deviant sizes were found in children.The lack of MMN deviance dependency in children suggests that unlike in teenagers and adults, neural signatures of automatic auditory motion processing do not mirror discrimination abilities.The study critically accounts for advanced understanding of children's central auditory development.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig Leipzig, Germany.

ABSTRACT
Studies on the maturation of auditory motion processing in children have yielded inconsistent reports. The present study combines subjective and objective measurements to investigate how the auditory perceptual abilities of children change during development and whether these changes are paralleled by changes in the event-related brain potential (ERP). We employed the mismatch negativity (MMN) to determine maturational changes in the discrimination of interaural time differences (ITDs) that generate lateralized moving auditory percepts. MMNs were elicited in children, teenagers, and adults, using a small and a large ITD at stimulus offset with respect to each subject's discrimination threshold. In adults and teenagers large deviants elicited prominent MMNs, whereas small deviants at the behavioral threshold elicited only a marginal or no MMN. In contrast, pronounced MMNs for both deviant sizes were found in children. Behaviorally, however, most of the children showed higher discrimination thresholds than teens and adults. Although automatic ITD detection is functional, active discrimination is still limited in children. The lack of MMN deviance dependency in children suggests that unlike in teenagers and adults, neural signatures of automatic auditory motion processing do not mirror discrimination abilities. The study critically accounts for advanced understanding of children's central auditory development.

No MeSH data available.