Visual integration across fixation: automatic processes are split but conscious processes remain unified in the split-brain
In this study we set out to explore this cross-hemifield interaction in more detail with the split-brain patient DDC and carried out two experiments. The aim of these experiments is to unveil the unity of deliberate and automatic processing in the context of visual integration across hemispheres. Experiment 1 suggests that automatic processing is split in this context. In contrast, when the patient is forced to adopt a conscious, deliberate, approach, processing seemed to be unified across visual fields (and thus across hemispheres). First, we looked at the confidence that DDC has in his responses. The experiment involved ...
Source: Frontiers in Human Neuroscience - November 10, 2023 Category: Neuroscience Source Type: research
Variance characteristic preserving common spatial pattern for motor imagery BCI
This study proposed a variance characteristic preserving CSP (VPCSP) that is modified by a regularization item based on graph theory. Specifically, we calculated the loss of abnormalities of the projected data while preserving the variance characteristic locally. Then the loss could be rewritten as a matrix with the introduction of the Laplace matrix, which turned it into a generalized eigenvalue problem equivalent to CSP. This study evaluated the proposed method on two public EEG datasets from the BCI competition. The modified method could extract robust and distinguishable features that provided higher classification per...
Source: Frontiers in Human Neuroscience - November 9, 2023 Category: Neuroscience Source Type: research
Can inertial measurement unit sensors evaluate foot kinematics in drop foot patients using functional electrical stimulation?
The accuracy of inertial measurement units (IMUs) in measuring foot motion in the sagittal plane has been previously compared to motion capture systems for healthy and impaired participants. Studies analyzing the accuracy of IMUs in measuring foot motion in the frontal plane are lacking. Drop foot patients use functional electrical stimulation (FES) to improve walking and reduce the risk of tripping and falling by improving foot dorsiflexion and inversion-eversion. Therefore, this study aims to evaluate if IMUs can estimate foot angles in the frontal and sagittal planes to help understand the effects of FES on drop foot pa...
Source: Frontiers in Human Neuroscience - November 9, 2023 Category: Neuroscience Source Type: research
Visual motion detection thresholds can be reliably measured during walking and standing
ConclusionVisual motion detection thresholds can be reliably measured during both walking and standing, and thresholds are higher during walking. (Source: Frontiers in Human Neuroscience)
Source: Frontiers in Human Neuroscience - November 9, 2023 Category: Neuroscience Source Type: research
Alterations via inter-regional connective relationships in Alzheimer ’s disease
Disruptions in the inter-regional connective correlation within the brain are believed to contribute to memory impairment. To detect these corresponding correlation networks in Alzheimer’s disease (AD), we conducted three types of inter-regional correlation analysis, including structural covariance, functional connectivity and group-level independent component analysis (group-ICA). The analyzed data were obtained from the Alzheimer’s Disease Neuroimaging Initiative, comprising 52 cognitively normal (CN) participants without subjective memory concerns, 52 individuals with late mild cognitive impairment (LMCI) and 52 pat...
Source: Frontiers in Human Neuroscience - November 9, 2023 Category: Neuroscience Source Type: research
Trajectory of post-COVID brain fog, memory loss, and concentration loss in previously hospitalized COVID-19 survivors: the LONG-COVID-EXP multicenter study
ConclusionThe use of Sankey plots shows a fluctuating evolution of post-COVID brain fog, memory loss, or concentration loss during the first years after the infection. In addition, exponential bar plots revealed a decrease in the prevalence of these symptoms during the first years after hospital discharge. No risk factors were identified in this cohort. (Source: Frontiers in Human Neuroscience)
Source: Frontiers in Human Neuroscience - November 9, 2023 Category: Neuroscience Source Type: research
Use of non-invasive transcutaneous auricular vagus nerve stimulation: neurodevelopmental and sensory follow-up
ConclusionThis is the first report of neurodevelopmental follow-up in infants who received taVNS-paired feeding. They had similar developmental outcomes as historical control infants failing oral feeds who received G-tubes. Our data suggests that infants who attained full oral feeds had better sensory processing. (Source: Frontiers in Human Neuroscience)
Source: Frontiers in Human Neuroscience - November 9, 2023 Category: Neuroscience Source Type: research
TelePriming sentence production in aphasia
ConclusionInteractive message-structure alignment processes remain largely intact in PWA, and the positive effects of structural priming in a collaborative communicative task are not diminished by remote delivery. The findings demonstrate the feasibility and validity of TelePriming in OA and PWA, laying experimental groundwork for future use of TelePriming in the assessment and treatment of clinical populations with limited access to face-to-face sessions. (Source: Frontiers in Human Neuroscience)
Source: Frontiers in Human Neuroscience - November 9, 2023 Category: Neuroscience Source Type: research
fMRI changes during multi-limb movements in Parkinson ’s disease
ConclusionMulti-limb force control deficits in PD appear to be related to widespread underactivation within the basal ganglia-cortical loop. An overactivation of higher-level motor regions within the prefrontal cortex and lateral cerebellum may reflect increased cognitive control and performance monitoring that emerges during more complex motor tasks such as those that involve the coordination of multiple limbs. (Source: Frontiers in Human Neuroscience)
Source: Frontiers in Human Neuroscience - November 9, 2023 Category: Neuroscience Source Type: research
Decoding reach-to-grasp from EEG using classifiers trained with data from the contralateral limb
Fundamental to human movement is the ability to interact with objects in our environment. How one reaches an object depends on the object’s shape and intended interaction afforded by the object, e.g., grasp and transport. Extensive research has revealed that the motor intention of reach-to-grasp can be decoded from cortical activities using EEG signals. The goal of the present study is to determine the extent to which information encoded in the EEG signals is shared between two limbs to enable cross-hand decoding. We performed an experiment in which human subjects (n = 10) were tasked to interact with a novel object with...
Source: Frontiers in Human Neuroscience - November 8, 2023 Category: Neuroscience Source Type: research
Transcranial direct current stimulation in semantic variant of primary progressive aphasia: a state-of-the-art review
The semantic variant of primary progressive aphasia (svPPA), known also as “semantic dementia (SD),” is a neurodegenerative disorder that pertains to the frontotemporal lobar degeneration clinical syndromes. There is currently no approved pharmacological therapy for all frontotemporal dementia variants. Transcranial direct current stimulation (tDCS) is a promising non-invasive brain stimulation technique capable of modulating cortical excitability through a sub-threshold shift in neuronal resting potential. This technique has previously been applied as adjunct treatment in Alzheimer’s disease, while data for frontote...
Source: Frontiers in Human Neuroscience - November 8, 2023 Category: Neuroscience Source Type: research
Comparison of comprehensive quantitative EEG metrics between typically developing boys and girls in resting state eyes-open and eyes-closed conditions
In this study, we have rigorously challenged this assumption by performing a comprehensive qEEG analysis on EEG recoding of TD boys (n = 84) and girls (n = 62), during resting state eyes-open and eyes-closed conditions (EEG recordings from Child Mind Institute’s Healthy Brain Network (HBN) initiative). Our qEEG analysis was performed over narrow-band frequencies (e.g., separating low α from high α, etc.), included sex, age, and head size as covariates in the analysis, and encompassed computation of a wide range of qEEG metrics that included both absolute and relative spectral power levels, regional hemispheric ...
Source: Frontiers in Human Neuroscience - November 7, 2023 Category: Neuroscience Source Type: research
Fronto-parietal theta high-definition transcranial alternating current stimulation may modulate working memory under postural control conditions in young healthy adults
ConclusionFronto-parietal θ HD-tACS has the potential of being a neuromodulatory tool for improving working memory performance in dual-task situations, but its effect on the modulation of concurrently performed postural control tasks requires further investigation. (Source: Frontiers in Human Neuroscience)
Source: Frontiers in Human Neuroscience - November 6, 2023 Category: Neuroscience Source Type: research
Time course of effective connectivity associated with perspective taking in utterance comprehension
This study discusses the effective connectivity in the brain and its time course in realizing perspective taking in verbal communication through electroencephalogram (EEG) associated with the understanding of Japanese utterances. We manipulated perspective taking in a sentence with the Japanese subsidiary verbs -ageru and -kureru, which mean "to give." We measured the EEG during the auditory presentation of the sentences with a multichannel electroencephalograph, and the partial directed coherence and its temporal variations were analyzed using the source localization method to examine causal interactions between nineteen ...
Source: Frontiers in Human Neuroscience - November 6, 2023 Category: Neuroscience Source Type: research
Editorial: Perspectives in non-invasive brain stimulation and neuromodulation
(Source: Frontiers in Human Neuroscience)
Source: Frontiers in Human Neuroscience - November 3, 2023 Category: Neuroscience Source Type: research
