Transcranial direct current stimulation (tDCS) to broca’s area: persisting effects on non-verbal motor behaviors

Hupfeld, Kathleen E.; Ketcham, Caroline J.; Schneider, Harry D.

doi:10.15761/ndt.1000102

Cited by 2 publications

(1 citation statement)

References 48 publications

(72 reference statements)

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“…Although Broca's area was not the ROI initially, it was consistently active in IPD interactions. The Broca's area was proved as a critical region for social communication, including the involvement of non-verbal behaviors (Hupfeld et al, 2017) and sign language (Trettenbrein et al, 2021). Our results highlighted the function of FPA (BA10), DLPFC (BA9/BA46), and Broca's area (BA45) in real-time differing social status IPD interactions after social feedback.…”

Section: Brain Activations In Real-time Differing Social Status Inter...mentioning

confidence: 54%

Neural and behavioral alterations of a real-time interpersonal distance (IPD) development process in differing social status interactions

Huang

Izumi

Suzukamo

2022

Front. Behav. Neurosci.

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BackgroundEvidence showed neural changes in interpersonal distance (IPD) interaction, and neural activities are affected by relationships (such as friends or strangers). Behavior studies proved that social status strongly affects IPD between two persons. However, how the differing social status impacts neural alterations in the IPD interactions remains unknown.ObjectivesThe teacher-student relationship is a typical representation of the difference in social status. The present study aims to investigate the IPD performance and brain processes underlying real-time differing social status during the development process from teacher-student interactions.Materials and methodsWe designed three within-subject experiments corresponding to the inclusion, control, and affection stages of IPD. Altogether, 38 valid healthy participants participated in three experiments with a teacher (differing social status condition, DS condition) and a peer student (peer social status condition, PS condition) separately. This study employed functional near-infrared spectroscopy (fNIRS) and modified real-time stop-distance paradigms to record IPD performance and neural processes.ResultsFor IPD performance, significantly larger IPD gaps were shown in the DS condition than in the PS condition, and IPD feedback affected IPD performance. For neural alterations, activated frontopolar area (FPA, BA10), dorsolateral prefrontal cortex (DLPFC, BA9/BA46), and Broca’s area (BA45) were observed across the IPD stages. Importantly, brain activation shifts with the development of IPD. In addition, results showed that differences in Oxy-Hb changes were located in the FPA (BA10), DLPFC (BA9/BA46), and Broca’s area (BA45) between the DS and PS conditions across IPD stages. Additionally, negative correlations were found between Oxy-Hb changes and IPD performance.ConclusionWe propose prefrontal cortex (PFC) and Broca’s area involvement in IPD interactions, initially focusing on evaluation and action periods, and later on IPD-evaluation processes after feedback. In addition, a difference in Oxy-Hb activities implies the complexity of relationships and social status in IPD interactions.

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Section: Brain Activations In Real-time Differing Social Status Inter...mentioning

confidence: 54%

Neural and behavioral alterations of a real-time interpersonal distance (IPD) development process in differing social status interactions

Huang

Izumi

Suzukamo

2022

Front. Behav. Neurosci.

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Sensory system-specific associations between brain structure and balance

Hupfeld

McGregor

Hass

et al. 2022

Preprint

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Nearly 75% of older adults in the United States report balance problems. Balance difficulties are more pronounced during sensory feedback perturbation (e.g., standing with the eyes closed or on foam). Although it is known that aging results in widespread brain atrophy, less is known about how brain structure relates to balance performance under varied sensory conditions in older age. We measured postural sway of 36 young (18-34 years) and 22 older (66-84 years) adults during four conditions: eyes open, eyes closed, eyes open on foam, and eyes closed on foam. We calculated three summary measures indicating visual, proprioceptive, and vestibular contributions to balance. We also collected T1-weighted and diffusion-weighted anatomical MRI scans. We aimed to: 1) test for age group differences in brain structure-balance relationships across a range of structural brain measures (i.e., volumetric, surface, and white matter microstructure); and 2) assess how brain structure measures relate to balance, regardless of age. Across both age groups, thinner cortex in multisensory integration regions was associated with greater reliance on visual inputs for balance. Greater gyrification within sensorimotor and parietal cortices was associated with greater reliance on proprioceptive inputs for balance. Poorer vestibular function was correlated with thinner vestibular cortex, greater gyrification within sensorimotor, parietal, and frontal cortices, and lower free water-corrected axial diffusivity in the superior-posterior corona radiata and across the corpus callosum. These results contribute to our scientific understanding of how individual differences in brain structure relate to balance. This has implications for developing brain stimulation interventions to improve balance.

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Transcranial direct current stimulation (tDCS) to broca’s area: persisting effects on non-verbal motor behaviors

Cited by 2 publications

References 48 publications

Neural and behavioral alterations of a real-time interpersonal distance (IPD) development process in differing social status interactions

Neural and behavioral alterations of a real-time interpersonal distance (IPD) development process in differing social status interactions

Sensory system-specific associations between brain structure and balance

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