The Role of the Dorsolateral Prefrontal Cortex for Speech and Language Processing

Hertrich, Ingo; Dietrich, Susanne; Blum, Corinna; Ackermann, Hermann

doi:10.3389/fnhum.2021.645209

Cited by 96 publications

(84 citation statements)

References 186 publications

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“…According to Table 2 as well as Section 3.4 , the supporting role of brain regions is maximal within the frontoparietal, dorsal attention, visual, and default mode networks such as DLPFC and PGi , regardless of the resting state or task engagement. This finding is in line with the previous studies showing the dominant role of these brain areas in internal processing and the facilitation of information exchange in functional brain networks [ 73 , 74 ].…”

Section: Discussionsupporting

confidence: 93%

On the Spatial Distribution of Temporal Complexity in Resting State and Task Functional MRI

Omidvarnia

Liégeois

Amico

et al. 2022

Entropy

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Measuring the temporal complexity of functional MRI (fMRI) time series is one approach to assess how brain activity changes over time. In fact, hemodynamic response of the brain is known to exhibit critical behaviour at the edge between order and disorder. In this study, we aimed to revisit the spatial distribution of temporal complexity in resting state and task fMRI of 100 unrelated subjects from the Human Connectome Project (HCP). First, we compared two common choices of complexity measures, i.e., Hurst exponent and multiscale entropy, and observed a high spatial similarity between them. Second, we considered four tasks in the HCP dataset (Language, Motor, Social, and Working Memory) and found high task-specific complexity, even when the task design was regressed out. For the significance thresholding of brain complexity maps, we used a statistical framework based on graph signal processing that incorporates the structural connectome to develop the null distributions of fMRI complexity. The results suggest that the frontoparietal, dorsal attention, visual, and default mode networks represent stronger complex behaviour than the rest of the brain, irrespective of the task engagement. In sum, the findings support the hypothesis of fMRI temporal complexity as a marker of cognition.

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Section: Discussionsupporting

confidence: 93%

On the Spatial Distribution of Temporal Complexity in Resting State and Task Functional MRI

Omidvarnia

Liégeois

Amico

et al. 2022

Entropy

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“…For neural plastic changes, we found that AC training increased the rGMV in the R. DLPFC, L. ITG, OFC, and right cerebellum (lobule 7 Crus 1). The DLPFC is suggested to be involved in central executive processes ( Hertrich et al, 2021 ). Particularly relevant to multiple tasks, the DLPFC is involved in scheduling processes in complex tasks (task management) ( Smith and Jonides, 1999 ).…”

Section: Discussionmentioning

confidence: 99%

Auditory Cognitive Training Improves Brain Plasticity in Healthy Older Adults: Evidence From a Randomized Controlled Trial

Kawata

Nouchi

Oba

et al. 2022

Front. Aging Neurosci.

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The number of older adults is increasing globally. Aging is associated with cognitive and sensory decline. Additionally, declined auditory performance and cognitive function affect the quality of life of older adults. Therefore, it is important to develop an intervention method to improve both auditory and cognitive performances. The current study aimed to investigate the beneficial effects of auditory and cognitive training on auditory ability and cognitive functions in healthy older adults. Fifty healthy older adults were randomly divided into four training groups—an auditory-cognitive training group (AC training; n = 13), an auditory training group (A training; n = 13), a cognitive training group (C training; n = 14), and an active control group (n = 12). During the training period, we reduced the sound intensity level in AC and A training groups and increase training task difficulty in AC, A, and C training groups based on participants’ performance. Cognitive function measures [digit-cancelation test (D-CAT); logical memory (LM); digit span (DS)], auditory measures [pure-tone audiometry (PTA)], and magnetic resonance imaging (MRI) scans were performed before and after the training periods. We found three key findings. First, the AC training group showed difference between other training groups (A, C, and active control training groups) in regional gray matter volume (rGMV) in the right dorsolateral prefrontal cortex, the left inferior temporal gyrus (L. ITG), the left superior frontal gyrus, the left orbitofrontal cortex, the right cerebellum (lobule 7 Crus 1). Second, the auditory training factor groups (ATFGs, the AC and A training groups) improved auditory measures and increased the rGMV and functional connectivity (FC) in the left temporal pole compared to the non-ATFGs (the C training group and active control group). Third, the cognitive training factor groups (CTFGs; the AC and C training groups) showed statistically significant improvement in cognitive performances in LM and D-CAT compared to the non-CTFGs (the A training group and active control group). Therefore, the auditory training factor and cognitive training factor would be useful in enhancing the quality of life of older adults. The current AC training study, the plasticity of the brain structure was observed after 4 weeks of training.

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“…Speech processing models propose that temporal information and memory representations are first integrated in the dorsolateral prefrontal cortex (DLPFC) to facilitate perception (Kotz & Schwartze, 2010, 2016. Given the functional role of the DLPFC in language processing has been mostly attributed to higher-level processing such as pragmatics, sentence processing, or comprehension of non-literal language (for review, see Hertrich et al, 2021), this is consistent with the lack of clear interactive effects at the sublexical level.…”

Section: Dissociable Processes Underlying Formal and Temporal Predict...mentioning

confidence: 54%

Electrophysiological correlates of phonological and temporal regularities in speech processing

Emmendorfer

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The Role of the Dorsolateral Prefrontal Cortex for Speech and Language Processing

Cited by 96 publications

References 186 publications

On the Spatial Distribution of Temporal Complexity in Resting State and Task Functional MRI

On the Spatial Distribution of Temporal Complexity in Resting State and Task Functional MRI

Auditory Cognitive Training Improves Brain Plasticity in Healthy Older Adults: Evidence From a Randomized Controlled Trial

Electrophysiological correlates of phonological and temporal regularities in speech processing

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