TY  - JOUR
T1  - Preattentive Processing of Level to Contour Tone Changes
AU - Sittiprapaporn, Wichian 
JO  - Research Journal of Applied Sciences
VL  - 7
IS  - 6
SP  - 301
EP  - 309
PY  - 2012
DA  - 2001/08/19
SN  - 1815-932x
DO  - rjasci.2012.301.309
UR  - https://makhillpublications.co/view-article.php?doi=rjasci.2012.301.309
KW  - Event-related potential
KW  -sound level tone
KW  -contour tone
KW  -mismatch negativity
KW  -Thailand
AB  - The main objective of the research reported here is to investigate the preattentive processing of changing from level tone to contour tone and vice versa. The long to short duration change with level to falling/rising and falling/rising to level tone changes perception elicited MMN between 196-220 msec with reference to the standard-stimulus ERPs. The long to short duration and level to falling/rising tone changes elicited a strong MMN bilaterally for both native and nonnative speakers of Thai, unlike short to long duration and falling/rising to level tone changes. Source localization analyses performed using LORETA-Key demonstrates that sources were obtained in the Middle Temporal Gyrus (MTG) of the left hemisphere and in the Superior Temporal Gyrus (STG) of the right hemisphere for both groups. The present study demonstrated that the grand enterprise of mapping language onto the human brain can be vitally enhanced by MMN studies.
ER  -