|
Oades, R.D., Dittmann-Balcar,
A. & Zerbin, D. (1997). Development
and topography of auditory event-related potentials, mismatch and
processing negativity from 8 to 22 years of age. Psychophysiology,
34, 677-693. (request
a copy) . (view)
Introduction:
How do ERPs reflecting auditory information processing develop across
adolescence? This development is described for the amplitude and latency
of five ERP components and four difference-waves in four groups of
11 healthy subjects with mean ages of 10, 14, 17 & 21 years.
Methods:
Vector normalised data were recorded from 19 sites during diffuse
and focused attention in a three-tone oddball. (i.e. in passive,
diffuse-attention and active, focussed-attention, discrimination conditions)
to see how ERP loci varied with age for tone-type, attention-condition
and for four types of difference-wave reflecting nontarget and target
comparisons: (mismatch negativity, MMN, an auditory working memory
trace; Negative difference, Nd, an attentional trace, but also Processing
Negativity, PN and the Goodin-waveform).
Results:
Age interacted with site for most components. P1 loci sensitive to
rare tones moved posteriorly and N1 loci lost their right bias at
early puberty (figure 1). But P2 loci
did not move anterior to Cz until adulthood. N2 amplitude, sensitive
to attention condition, developed a mature frontal focus by 17 years.
Right-biased P3 loci move to the midline with focused attention in
young and old alike (figure 1).
Difference-waves reflected three developmental stages (figure
2): In 10 year-olds early deflections (<150 ms) were diffusely
distributed; in mid-adolescence the main frontal negative component
(150-300 ms) became well-formed and lost an earlier right bias; over
17 years the late positive complex developed a right bias in target-derived
waves. Latency decreases for early frontal components were marked
in 10-14y olds and for later posterior components in 14-17y olds.
MMN topography matured (from a right lateral to bilateral distribution)
between 10 and 14 y, while Nd topography matured and became bilateral
between 14 and 17y (figure 3).
Conclusions:
Major developments of brain function appear at the onset of adolescence
(<14y) in early stimulus-selection processes and during adolescence
in the differential use of this information (N2- and P3-like latencies:
see figure 2).
|
|