auditory processing disorder in adults aphasia

These studies have not reported group differences in latency of early perceptual ERPs, suggesting ASD is associated with reduced early perceptual attention to linguistic stimuli that is not due strictly to processing speed or orienting. Interestingly, among high functioning youth with ASD, P1 amplitude to speech sounds may be moderated by active attention to stimuli ( Whitehouse & Bishop, 2008). Relative to neurotypical controls, youth with ASD show attenuated perceptual ERP amplitudes in response to auditory speech-like stimuli (i.e., vowels) but no difference in response to non-speech stimuli (i.e., tones) ( Čeponienė et al., 2003 Whitehouse & Bishop, 2008). Using ERP, basic auditory processing, including stimulus evaluation, is reflected in components that occur within the first 200 milliseconds after stimulus onset (e.g. On the other hand, atypical neural activation is nearly always documented in ASD when speech-like stimuli are used (for review, see Groen, Zwiers, van der Gaag, & Buitelaar, 2008). These inconsistencies may reflect heterogeneity in the ASD phenotype, particularly as language ability has been correlated with amplitudes of early auditory perceptual ERP components in individuals with ASD ( Bruneau, Bonnet-Brilhault, Gomot, Adrien, & Barthélémy, 2003 Kemner, Verbaten, Cuperus, Camfferman, & van Engeland, 1995 Lincoln, Courchesne, Harms, & Allen, 1995). Some studies report delayed or impaired detection of novel stimuli ( Cardy, Flagg, Roberts, & Roberts, 2005 Jansson-Verkasalo et al., 2003), others show faster latency to a mismatch negativity (MMN) ERP component reflecting auditory discrimination ( Gomot, Giard, Adrien, Barthelemy, & Bruneau, 2002), and still others show no group differences ( Čeponienė et al., 2003).

While some children with ASD appear to show enhanced discrimination of basic auditory input, such as pitch and musical tones ( Heaton, Hudry, Ludlow, & Hill, 2008 Jones et al., 2009 Miller, 1989), there are conflicting results when complex acoustic stimuli are used. However, the pattern of atypicality depends on the type and complexity of stimulus ( O’Connor, 2012 Samson, Mottron, Jemel, Belin, & Ciocca, 2006). Atypical neurophysiological response to auditory stimuli among individuals with ASD has been recorded across multiple methodologies, including scalp electrophysiology (EEG and ERP) and functional neuroimaging (fMRI, MEG).

Auditory processing, which provides a link between language comprehension and basic sensory perception, is well studied in ASD, with atypical responses apparent at both behavioral and neurophysiological levels ( Kuhl, Coffey-Corina, Padden, & Dawson, 2005 Marco, Hinkley, Hill, & Nagarajan, 2011 Novick, Vaughan, Kurtzberg, & Simson, 1980). Individuals with ASD often show impairment in receptive/expressive language level and language pragmatics, as well as sensory-seeking or sensory-avoiding behaviors.

Autism spectrum disorder (ASD) is a neurodevelopmental disorder associated with social communication deficits and restricted and repetitive behaviors.

Auditory processing disorder in adults aphasia