Quantity language speakers show enhanced subcortical processing
Dawson, C., Aalto, D., Šimko, J., Putkinen, V., Tervaniemi, M., & Vainio, M. (2016). Quantity language speakers show enhanced subcortical processing. Biological Psychology, 118(July), 169-175. https://doi.org/10.1016/j.biopsycho.2016.06.003
Julkaistu sarjassa
Biological PsychologyTekijät
Päivämäärä
2016Tekijänoikeudet
© 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
The complex auditory brainstem response (cABR) can reflect language-based plasticity in subcortical
stages of auditory processing. It is sensitive to differences between language groups as well as stimulus
properties, e.g. intensity or frequency. It is also sensitive to the synchronicity of the neural population
stimulated by sound, which results in increased amplitude of wave V.
Finnish is a full-fledged quantity language, in which word meaning is dependent upon duration of the
vowels and consonants. Previous studies have shown that Finnish speakers have enhanced behavioural
sound duration discrimination ability and larger cortical mismatch negativity (MMN) to duration change
compared to German and French speakers.
The next step is to find out whether these enhanced duration discrimination abilities of quantity language
speakers originate at the brainstem level. Since German has a complementary quantity contrast
which restricts the possible patterns of short and long vowels and consonants, the current experiment
compared cABR between nonmusician Finnish and German native speakers using seven short complex
stimuli. Finnish speakers had a larger cABR peak amplitude than German speakers, while the peak onset
latency was only affected by stimulus intensity and spectral band. The results suggest that early cABR
responses are better synchronised for Finns, which could underpin the enhanced duration sensitivity of
quantity language speakers.
...
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