The effect of speech distortion on the excitability of articulatory motor cortex

Nuttall, Helen E.; Kennedy-Higgins, Dan; Hogan, John S; Devlin, Joseph T.; Adank, Patti

doi:10.1016/j.neuroimage.2015.12.038

Cited by 50 publications

(69 citation statements)

References 49 publications

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“…Correlational analyses were then performed to evaluate the relationship between hearing abilities (measured as PTA) and the excitability of the lip motor cortex. In one study (Nuttall et al, 2016), there was a greater motor facilitation when listening to the challenging condition than to clear speech for individuals with less sensitive hearing, while there was an opposite finding in the other study . The authors suggested that the type of perturbation affected the direction of the correlation.…”

Section: Discussionmentioning

confidence: 81%

“…We found a significant correlation between hearing sensitivities and facilitation of the tongue motor cortex during speech perception in older adults, but not in young adults. Two previous TMS studies in young adults with normal hearing found a relationship between hearing abilities and facilitation of the articulatory motor cortex during speech perception (Nuttall et al, 2016. In these studies, young adults received single-pulse TMS to elicit lip MEPs while they listened to clear speech or speech in challenging conditions.…”

Section: Discussionmentioning

confidence: 99%

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Decline of auditory-motor speech processing in older adults with hearing loss

Panouillères

Möttönen

2017

Preprint

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Older adults often experience difficulties in understanding speech, partly because of age-related hearing loss. In young adults, activity of the left articulatory motor cortex is facilitated and interacts with the auditory cortex via the left-hemispheric dorsal stream during speech processing. Although it is unknown how ageing and age-related hearing loss affect the articulatory motor cortex, it has been proposed that enhanced activation of the frontal motor system in older adults would compensate for auditory deficits. The aim of the present study was to investigate the effect of ageing and agerelated hearing loss on the excitability of the tongue motor cortex during listening to spoken sentences using transcranial magnetic stimulation and electromyography. Our results show that the excitability of the tongue motor cortex was similarly facilitated during listening to speech in young and older adults with normal hearing, whereas it was reduced in older adults with hearing loss.These findings suggest a decline of auditory-motor processing of speech in adults with age-related hearing loss.

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Section: Discussionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Decline of auditory-motor speech processing in older adults with hearing loss

Panouillères

Möttönen

2017

Preprint

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“…It is equally remarkable that humans are able to swiftly and flexibly take advantage of diverse cues and resources in order to deal with the perceptual task at hand (Erb et al, 2013; Brown and Kuperberg, 2015). Listeners have been argued to draw on their knowledge about how speech is produced in order to help decode speech under difficult listening conditions (Nuttall et al, 2016) and as a tool to predict how upcoming speech will sound (Brunellière et al, 2009; Tian and Poeppel, 2010, 2013). What this exploratory study has suggested is that this knowledge is not static, but is updated and modulated by our ongoing sensorimotor experiences.…”

Section: Discussionmentioning

confidence: 99%

Mapping the Speech Code: Cortical Responses Linking the Perception and Production of Vowels

Schuerman

Meyer

McQueen

2017

Front. Hum. Neurosci.

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The acoustic realization of speech is constrained by the physical mechanisms by which it is produced. Yet for speech perception, the degree to which listeners utilize experience derived from speech production has long been debated. In the present study, we examined how sensorimotor adaptation during production may affect perception, and how this relationship may be reflected in early vs. late electrophysiological responses. Participants first performed a baseline speech production task, followed by a vowel categorization task during which EEG responses were recorded. In a subsequent speech production task, half the participants received shifted auditory feedback, leading most to alter their articulations. This was followed by a second, post-training vowel categorization task. We compared changes in vowel production to both behavioral and electrophysiological changes in vowel perception. No differences in phonetic categorization were observed between groups receiving altered or unaltered feedback. However, exploratory analyses revealed correlations between vocal motor behavior and phonetic categorization. EEG analyses revealed correlations between vocal motor behavior and cortical responses in both early and late time windows. These results suggest that participants' recent production behavior influenced subsequent vowel perception. We suggest that the change in perception can be best characterized as a mapping of acoustics onto articulation.

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“…MEPs tend to consist of multiple peaks, in contrast with hand MEPs, which tend to consist of two successive midline deflections (peak and trough) (Adank et al, 2016). It is not straightforward to measure p-p amplitudes when successive peaks are present, and the amplitude of lip MEPs can be underestimated if p-p is used as successive peaks in an OO MEP complex would be excluded from the final amplitude measurement.…”

Section: Effects Of Coil Orientation 10mentioning

confidence: 99%

“…The OO muscle is relevant to both clinical research, e.g., in Bell's Palsy (Schriefer et al, 1988, Meyer et al, 1994, and cognitive neuroscience studies where OO MEPs have been recorded to investigate changes in motor cortex activity during speech perception (Fadiga et al, 2002, Roy et al, 2008, Murakami et al, 2011, Swaminathan et al, 2013, Nuttall et al, 2016, Nuttall et al, 2017. These studies induced a PA current flow by adopting the standard 45 o downward pointing orientation recommended for hand MEP acquisition, despite the fact it has not been explicitly verified that the 45 o orientation used for hand MEPs is also suitable for OO.…”

Section: Introductionmentioning

confidence: 99%

Effects of coil orientation on Motor Evoked Potentials from Orbicularis Oris and First Dorsal Interosseous

Adank

Kennedy-Higgins

Maegherman

et al. 2018

Preprint

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Objective: This study aimed to characterise effects of coil orientation on the size of Motor Evoked Potentials (MEPs) from both sides of Orbicularis Oris (OO) and compare these effects with those reported for First Dorsal Interosseous (FDI), following stimulation to left lip and left hand Primary Motor Cortex.Methods: Using a 70mm figure-of-eight coil, we collected MEPs from eight different orientations while recording from contralateral and ipsilateral OO and FDI using a monophasic pulse.Results: MEPs from OO were evoked consistently for six out of eight orientations for contralateral and ipsilateral sites. When latency and silent periods were taken into account, contralateral orientations 0°, 45°, 90°, and 315° were found to best elicit OO MEPs with a likely cortical origin. As expected, the largest FDI MEPs were recorded with an orientation of 45°, invoking a posterior-anterior (PA) current flow, from the contralateral location. Conclusion:Orientations traditionally used for FDI were also found suitable for eliciting OO MEPs. Individuals vary more in their optimal coil orientation for eliciting MEPs from OO than for FDI. It is recommended that researchers iteratively probe several orientations when eliciting MEPs from OO. Care must be taken however because several orientations likely induced direct activation of facial muscles.

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The effect of speech distortion on the excitability of articulatory motor cortex

Cited by 50 publications

References 49 publications

Decline of auditory-motor speech processing in older adults with hearing loss

Decline of auditory-motor speech processing in older adults with hearing loss

Mapping the Speech Code: Cortical Responses Linking the Perception and Production of Vowels

Effects of coil orientation on Motor Evoked Potentials from Orbicularis Oris and First Dorsal Interosseous

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