Figure 1.

Mismatch negativity (grand average, infrequent-frequent difference waveform) reflects the development of language specific memory traces (left-hemisphere C3 in the figure). Frequent phoneme was/e/, infrequent phoneme was non-native, Estonian/รต/. The MMN amplitude in response to non-native phoneme contrast diminished from the age of 6 months (on the left) to the age of 12 months (on the right) in the full-term controls, while in the prematurely born children this kind of reduction was not observed.

Jansson-Verkasalo et al. BMC Neuroscience 2010 11:88   doi:10.1186/1471-2202-11-88
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