Cortical representation of vowels reflects acoustic dissimilarity determined by formant frequencies

被引:67
作者
Obleser, J
Elbert, T
Lahiri, A
Eulitz, C
机构
[1] Univ Konstanz, Dept Clin Psychol, D-78457 Constance, Germany
[2] Univ Konstanz, Dept Linguist, D-7750 Constance, Germany
来源
COGNITIVE BRAIN RESEARCH | 2003年 / 15卷 / 03期
关键词
auditory cortex; auditory evoked potential; central auditory system; auditory evoked field;
D O I
10.1016/S0926-6410(02)00193-3
中图分类号
TP18 [人工智能理论];
学科分类号
081104 ; 0812 ; 0835 ; 1405 ;
摘要
We studied neuromagnetic correlates of the processing of German vowels [a], [e] and [i]. The aim was (i) to show an influence of acoustic/phonetic features on timing and mapping of the N100m component and (ii) to demonstrate the retest reliability of these parameters. To assess the spatial configuration of the N100m generators, Euclidean distances between vowel sources were computed. Latency, amplitude, and source locations of the N100m component differed between vowels. The acoustically most dissimilar vowels [a] and [i] showed more distant source locations than the more similar vowels [e] and [i]. This pattern of results was reliably found in a second experimental session after at least 5 days. The results suggest the preservation of spectral dissimilarities as mapped in a F-1-F-2 vowel space in a cortical representation. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:207 / 213
页数:7
相关论文
共 33 条
[1]   Cortical plasticity: From synapses to maps [J].
Buonomano, DV ;
Merzenich, MM .
ANNUAL REVIEW OF NEUROSCIENCE, 1998, 21 :149-186
[2]   Development of language-specific phoneme representations in the infant brain [J].
Cheour, M ;
Ceponiene, R ;
Lehtokoski, A ;
Luuk, A ;
Allik, J ;
Alho, K ;
Naatanen, R .
NATURE NEUROSCIENCE, 1998, 1 (05) :351-353
[3]   The neurotopography of vowels as mirrored by evoked magnetic field measurements [J].
Diesch, E ;
Eulitz, C ;
Hampson, S ;
Ross, B .
BRAIN AND LANGUAGE, 1996, 53 (02) :143-168
[4]   Magnetic fields elicited by tones and vowel formants reveal tonotopy and nonlinear summation of cortical activation [J].
Diesch, E ;
Luce, T .
PSYCHOPHYSIOLOGY, 1997, 34 (05) :501-510
[5]   Topographic and temporal indices of vowel spectral envelope extraction in the human auditory cortex [J].
Diesch, E ;
Luce, T .
JOURNAL OF COGNITIVE NEUROSCIENCE, 2000, 12 (05) :878-893
[6]   Between sound and perception: reviewing the search for a neural code [J].
Eggermont, JJ .
HEARING RESEARCH, 2001, 157 (1-2) :1-42
[7]   EXTENSIVE REORGANIZATION OF THE SOMATOSENSORY CORTEX IN ADULT HUMANS AFTER NERVOUS-SYSTEM INJURY [J].
ELBERT, T ;
FLOR, H ;
BIRBAUMER, N ;
KNECHT, S ;
HAMPSON, S ;
LARBIG, W ;
TAUB, E .
NEUROREPORT, 1994, 5 (18) :2593-2597
[8]  
EULITZ C, 1995, J NEUROSCI, V15, P2748
[9]   LINEAR PHONEME BOUNDARIES FOR GERMAN SYNTHETIC 2-FORMANT VOWELS [J].
HOSE, B ;
LANGNER, G ;
SCHEICH, H .
HEARING RESEARCH, 1983, 9 (01) :13-25
[10]   Auditory processing in primate cerebral cortex [J].
Kaas, JH ;
Hackett, TA ;
Tramo, MJ .
CURRENT OPINION IN NEUROBIOLOGY, 1999, 9 (02) :164-170