Impaired speech perception in aphasic patients: event-related potential and neuropsychological assessment

  title={Impaired speech perception in aphasic patients: event-related potential and neuropsychological assessment},
  author={Val{\'e}ria Cs{\'e}pe and Judit Osm{\'a}n-S{\'a}gi and M{\'a}rk Moln{\'a}r and M{\'a}ria G{\'o}sy},
The mismatch negativity (MMN) response to complex tones and spoken words in individuals with aphasia
Background: The mismatch negativity (MMN) is a fronto-centrally distributed event-related potential (ERP) that is elicited by any discriminable auditory change. It is an ideal neurophysiological tool
Identification of target tones and speech sounds studied with event-related potentials: Language-related changes in aphasia
Background: Although frequently observed in aphasia, the contribution of speech sound processing impairments to auditory comprehension deficits has not been clarified. Event-related brain potentials
The Protective Influence of Bilingualism on the Recovery of Phonological Input Processing in Aphasia After Stroke
Investigation of the preattentive and attentive phonological discrimination ability in 17 aphasic patients at two timepoints during aphasia recovery finds a significant improvement of behavioral language performance in both languages.
Neurophysiological predictors of aphasia recovery in patients with large left-hemispheric infarction: a mismatch negativity study
LIs of MMN amplitudes at approximately 2 weeks post left-hemispheric stroke serve as more sensitive predictors of language outcome, among which the LI over the perisylvian area exhibits the best predictive value.
Processing of audiovisual stimuli in aphasic and non-brain-damaged listeners
Background: During speech perception not only auditory but also visual information (seen speech) is processed. This was shown by, for example, McGurk and MacDonald (1976). In their study participants
Speech elicited mismatch negativity in patients with aphasia
Results showed that speech processing at cortical levels was impaired in aphasics, and aphasic patients of different types differed significantly from the control group in all the parameters of the MMN test.
Auditory Event-Related Potentials in Studying Developmental Dyslexia
During the last decade an intensive use of electrophysiological techniques could be seen in developmental studies. The growing use of these techniques in a research area, called developmental


Neurophysiologic bases of pitch and place of articulation perception: A case study
Behavioral and neurophysiologic correlates of pitch and phoneme perception were investigated in a 42‐year‐old male with a unilateral cortical lesion (due to left hemisphere frontal‐temporal‐parietal craniotomy) and revealed that the subjects discrimination of pitch was intact, however his discrimination of place was severly impaired.
Cortical Differences in Tonal versus Vowel Processing as Revealed by an ERP Component Called Mismatch Negativity (MMN)
Event-related potentials were recorded from four aphasic subjects in order to study if discrimination of synthetic vowels is impaired by left posterior brain damage, and the fact that all four patients produced an MMN response to sine wave stimuli indicates that the result does not reflect an across-the-board effect.
Phonological factors in auditory comprehension in aphasia
Mismatch Negativity in the Neurophysiologic/Behavioral Evaluation of Auditory Processing Deficits: A Case Study
An 18 year-old woman with grossly abnormal auditory brain stem response, normal peripheral hearing, and specific behavioral auditory processing deficits is evaluated; the mismatch negativity (MMN) cortical eventirelated potential may provide an objective measure of auditory discrimination.
Phonemic Identification Defect in Aphasia
Acoustic versus phonetic representation of speech as reflected by the mismatch negativity event-related potential.
Aphasia, dichotic testing and defective hearing.
In a consecutive series of 114 patients who could cope with the test, 29 showed signs of an acquired left ear advantage (LEA), but the LEA of 11 patients lacked audiological rationales and a compensatory shift of cerebral speech-lateralization cannot be excluded.
Event-related brain potentials and the perception of a phonetic continuum
Auditory perception of speech and speech sounds in recent and recovered cases of aphasia