It's not what you say but the way that you say it: an fMRI study of differential lexical and non-lexical prosodic pitch processing

BMC Neuroscience

Research Article

Sukhwinder S Shergill¹  David K Ho¹  Owen O'Daly¹  Derek K Tracy¹  Eleanor Dimond¹  Lisa C Lloyd¹  Panayiota Michalopoulou¹  Kazunori Matsumoto² 

[1] CSI Lab, Institute of Psychiatry, King's College London, UK;Department of Psychiatry, Tohoku University School of Medicine, Sendai, Japan;

关键词: Temporal Cortex;    Inferior Frontal Gyrus;    Superior Temporal Gyrus;    Inferior Parietal Lobule;    Middle Frontal Gyrus;   

DOI  :  10.1186/1471-2202-12-128

 received in 2011-05-18, accepted in 2011-12-20,  发布年份 2011

来源: Springer

【 摘 要 】

BackgroundThis study aims to identify the neural substrate involved in prosodic pitch processing. Functional magnetic resonance imaging was used to test the premise that prosody pitch processing is primarily subserved by the right cortical hemisphere.Two experimental paradigms were used, firstly pairs of spoken sentences, where the only variation was a single internal phrase pitch change, and secondly, a matched condition utilizing pitch changes within analogous tone-sequence phrases. This removed the potential confounder of lexical evaluation. fMRI images were obtained using these paradigms.ResultsActivation was significantly greater within the right frontal and temporal cortices during the tone-sequence stimuli relative to the sentence stimuli.ConclusionThis study showed that pitch changes, stripped of lexical information, are mainly processed by the right cerebral hemisphere, whilst the processing of analogous, matched, lexical pitch change is preferentially left sided. These findings, showing hemispherical differentiation of processing based on stimulus complexity, are in accord with a 'task dependent' hypothesis of pitch processing.

【 授权许可】

CC BY   
© Tracy et al; licensee BioMed Central Ltd. 2011