Increased Activation in Superior Temporal Gyri as a Function of Increment in Phonetic Features

Autor/inn/en	Osnes, Berge; Hugdahl, Kenneth; Hjelmervik, Helene; Specht, Karsten
Titel	Increased Activation in Superior Temporal Gyri as a Function of Increment in Phonetic Features
Quelle	In: Brain and Language, 116 (2011) 2, S.97-101 (5 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0093-934X
DOI	10.1016/j.bandl.2010.10.001
Schlagwörter	Stimuli; Phonetics; Brain Hemisphere Functions; Cognitive Processes; Auditory Stimuli; Diagnostic Tests; Acoustics + Suchen Sie Ihr Suchwort? Anreizsystem; Phonetik; Fonetik; Cognitive process; Kognitiver Prozess; Auditive Stimulation; Diagnostic test; Diagnostischer Test; Akustik
Abstract	A common assumption is that phonetic sounds initiate unique processing in the superior temporal gyri and sulci (STG/STS). The anatomical areas subserving these processes are also implicated in the processing of non-phonetic stimuli such as music instrument sounds. The differential processing of phonetic and non-phonetic sounds was investigated in this study by applying a "sound-morphing" paradigm, where the presence of phonetic features were parametrically varied, creating a step-wise transition from a non-phonetic sound into a phonetic sound. The stimuli were presented in an event-related fMRI design. The fMRI-BOLD data were analysed using parametric contrasts. The results showed a higher sensitivity for sounds containing phonetic features compared to non-phonetic sounds in the middle part of STG, and in the anterior part of the planum temporale (PT) bilaterally. Although the same areas were involved in the processing of non-phonetic sounds, a difference in activation was evident in the STG, with an increase in activation related to increment of phonetic features in the sounds. The results indicate a stimulus-driven, bottom-up process that utilizes general auditory resources in the secondary auditory cortex, depending on specific phonetic features in the sounds. (Contains 1 table and 3 figures.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10