Neuromagnetic recordings reveal the temporal dynamics of auditory spatial processing in the human cortex

Tiitinen, Hannu; Salminen, Nelli H.; Palomäki, Kalle; Mäkinen, Ville; Alku, Paavo; May, Patrick

doi:10.1016/j.neulet.2005.11.018

Cited by 41 publications

(30 citation statements)

References 21 publications

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“…The model replicated experimental results both on the single-cell [5] and mass-action [3] levels of observation. Crucially, even though the model was specifically adapted to localize sound sources, neurons within the network were not only tuned to location but also to speech sound identity.…”

Section: Discussionsupporting

confidence: 69%

“…The right-hemispheric N1m varied similarly with larger responses to sound sources in the left than for those in the right. (bottom)[3].…”

mentioning

confidence: 99%

“…International Congress Series 1300 (2007) 81 -84 www.ics-elsevier.com of localizing sounds with different identities and tested the model for how well it could replicate previous MEG results[3].…”

mentioning

confidence: 99%

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Overlapping ‘what’ and ‘where’ in a model of auditory cortical processing

Salminen

May

Tiitinen

2007

International Congress Series

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Section: Discussionsupporting

confidence: 69%

“…The right-hemispheric N1m varied similarly with larger responses to sound sources in the left than for those in the right. (bottom)[3].…”

mentioning

confidence: 99%

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Overlapping ‘what’ and ‘where’ in a model of auditory cortical processing

Salminen

May

Tiitinen

2007

International Congress Series

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“…The mammalian studies further suggest that both cortices contain each channel, but that the size (number of neurons) of the channel tuned to the contralateral hemispace is larger in each cortex. Physiological studies on humans, however, have found that this contralateral preference is mainly restricted to one cortex, the other showing little such preference [8,[15][16][17][18][19][20][21]. This asymmetry is consistent with the finding that patients with injury to the right cortex exhibit sound localization deficits across azimuthal space, whereas patients with left cortical lesions primarily exhibit deficits in contralateral space [22,23].…”

Section: Introductionsupporting

confidence: 76%

Asymmetries in the representation of space in the human auditory cortex depend on the global stimulus context

2016

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Studies on humans and other mammals have provided evidence for a two-channel or three-channel representation of horizontal space in the auditory system, with one channel maximally responsive to each of the left hemispace, the right hemispace and, possibly, the midline. Mammalian studies have suggested that the contralateral channel is larger in both cortices, but human studies have found this contralateral preference in only one of the cortices. However, human studies are in conflict as to whether the contralateral preference is in the left or the right auditory cortex, and there are a number of methodological differences that this conflict could be attributed to. A key difference between studies is the duration of the silent interval preceding each stimulus and any perception of sound-source movement that the absence of a silent interval creates. We presented auditory noises that alternated between -90° (left) and +90° (right) and recorded neural responses (event-related potentials) using electroencephalography. We randomly varied the duration of the silent interval preceding each stimulus to create a condition with an immediate (local) stimulus context similar to that used in a study reporting contralateral preference in the left auditory cortex, a condition with a local context similar to that in a study reporting contralateral preference in the right auditory cortex, and an intermediate condition. Surprisingly, we found that both auditory cortices exhibited a similarly strong contralateral preference under all conditions, with responses 27% greater, on average, to the contralateral than the ipsilateral space. This suggests that both the cortices can exhibit a contralateral preference, but whether these preferences manifest depends on the global, rather than the local, stimulus context.

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“…As observed in source reconstruction studies, the MMN is generated by a temporo-frontal network (for a review, see Garrido, Kilner, Stephan, & Friston, 2009). This network includes regions in the temporal lobe -bilateral auditory cortices (Deouell, Bentin, & Giard, 1998;Grau, Fuentemilla, & Marco-Pallarés, 2007;Jemel, Achenbach, Müller, Röpcke, & Oades, 2002;Tiitinen et al, 2006), and prefrontal lobe (e.g., Giard et al, 1990;Opitz, Rinne, Mecklinger, Von Cramon, & Schröger, 2002). Both regions have been shown to contribute to speech sound perception.…”

Section: Discussionmentioning

confidence: 99%

Complex linguistic rules modulate early auditory brain responses

et al. 2015

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During speech perception, listeners compensate for phonological rules of their language. For instance, English place assimilation causes green boat to be typically pronounced as greem boat; English listeners, however, perceptually compensate for this rule and retrieve the intended sound (n). Previous research using EEG has focused on rules with clear phonetic underpinnings, showing that perceptual compensation occurs at an early stage of speech perception. We tested whether this early mechanism also accounts for the compensation for more complex rules. We examined compensation for French voicing assimilation, a rule with abstract phonological restrictions on the contexts in which it applies. Our results reveal that perceptual compensation for this rule by French listeners modulates an early ERP component. This is evidence that early stages of speech sound categorization are sensitive to complex phonological rules of the native language.

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Neuromagnetic recordings reveal the temporal dynamics of auditory spatial processing in the human cortex

Cited by 41 publications

References 21 publications

Overlapping ‘what’ and ‘where’ in a model of auditory cortical processing

Overlapping ‘what’ and ‘where’ in a model of auditory cortical processing

Asymmetries in the representation of space in the human auditory cortex depend on the global stimulus context

Complex linguistic rules modulate early auditory brain responses

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