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Prefrontal Cortex Brain Activation During Texting and Walking: A Functional Near-Infrared Spectroscopy Feasibility Study

Tal Krasovsky, Rawda Madi, Eyal Fruchter, Elias Jahjah, and Roee Holtzer

activation during task performance. This technology elucidates the unique role of the prefrontal cortex (PFC) in gait control, notably under dual-task (DT) conditions ( Bishnoi et al., 2021 ). The PFC is associated with higher-order executive functions such as working memory and attention ( Shechner & Bar

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Lateral Prefrontal Cortex Activation Induced by Proficient Skills During Rhythm Action Game

Takashi Oyama, Fumiya Chiba, and Teruaki Ito

hippocampus, cerebellum, and dorsolateral prefrontal cortex (PFC) in older adults. Game playing can also enhance cognitive control ( Anguera et al., 2013 ), cognitive skills ( Bediou et al., 2018 ), and the ability to learn new tasks ( Green & Baveiler, 2012 ). The cognitive skills required to achieve the

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Prefrontal Cortex Activity in Siblings With and Without Developmental Coordination Disorder: An Exploratory Study

Mandy S. Plumb, Megan Charity, Kimberly Milla, Barry Bodt, and Nancy Getchell

begun to unravel the correlates of the cerebral cortex in this population (e.g.,  Wilson et al., 2017 ). However, the deficits seen in DCD are movement related; therefore, the strict confines of the fMRI and motion artifacts observed in EEG may not give us a true representation of performance on an

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Effect of the Level of Physical Activity on Prefrontal Cortex Hemodynamics in Older Adults During Single- and Dual-Task Walking

Charles Germain, Alexandra Perrot, Christophe Tomasino, Julien Bonnal, Canan Ozsancak, Pascal Auzou, and Fabrice Prieur

) that showed the prophylactic effects of regular exercise on prefrontal cortex (PFC) ( Colcombe et al., 2003 ), numerous transversal and interventional studies showed that physical activity can optimize the volume, integrity, and brain function of certain areas associated with the performance of

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Bilateral Dorsolateral Prefrontal Cortex High-Definition Transcranial Direct-Current Stimulation Improves Time-Trial Performance in Elite Cyclists

Luca Pollastri, Gabriele Gallo, Milena Zucca, Luca Filipas, Antonio La Torre, Ugo Riba, Luigi Molino, and Elisabetta Geda

been an increasing number of studies that have investigated the effects of anodal tDCS on endurance physical performance. The results are contrasting for all the areas targeted 3 , 4 (primary motor cortex—M1, insular cortex [IC], prefrontal cortex [PFC]), with some studies that showed positive effects

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Sensory Disturbances after Focal Extirpations of the Human “Motor” Cortex

Joel A. Vilensky and Sid Gilman

From the late 1800s until approximately the middle of the 20th century, neurosurgeons made discrete motor cortex lesions in humans in attempts to reduce or eliminate a variety of involuntary movements, resulting mainly from epilepsy. In some cases, the neurosurgeons tested and recorded their patients' ability to perform various movements and to perceive various types of sensory stimuli after the operation. Although these studies have been largely forgotten, they have an immense advantage over primate lesion studies for understanding the function of the motor cortex because the patients were able to attempt to perform complex movements upon request, and to describe their perceptions of cutaneous stimuli, including integrated sensations (e.g., recognition of objects by palpation alone). We provide here a table containing the results of these studies pertaining to sensory deficits. The most consistent and persistent sensory deficits reported relate to object recognition and position sense. This finding is in keeping with recent electrophysiological studies in primates. Our analysis suggests that the “motor” cortex serves important sensory functions; hence, the term sensorimotor cortex, remains appropriate for the primate precentral (and postcentral) cortex.

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Motor Cortex Inhibition is Increased During a Secondary Cognitive Task

Katherine G. Holste, Alia L. Yasen, Matthew J. Hill, and Anita D. Christie

The purpose of this study was to assess the effect of a cognitive task on motor cortex excitability and inhibition. Transcranial magnetic stimulation of the motor cortex was performed on 20 healthy individuals (18–24 years; 9 females) to measure motor evoked potentials (MEPs) and cortical silent periods at baseline, during, and following a secondary cognitive task. The MEP amplitude increased from 0.50 ± 0.09–0.87 ± 0.50 mV during a secondary cognitive task (p = .04), and returned to baseline (0.48 ± 0.31 mV; p = .90) posttask. The CSP duration also increased from 93.48 ± 28.76–113.6 ± 33.68 ms (p = .001) during the cognitive task, and returned to baseline posttask (89.0 ± 6.9 ms; p = .88). In the presence of a cognitive task, motor cortex excitability and inhibition were both increased relative to baseline. The increase in inhibition may help to explain the motor deficits experienced while performing a secondary cognitive task.

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Effects of Bilateral Dorsolateral Prefrontal Cortex High-Definition Transcranial Direct-Current Stimulation on Physiological and Performance Responses at Severe-Intensity Exercise Domain in Elite Road Cyclists

Gabriele Gallo, Elisabetta Geda, Roberto Codella, Emanuela Faelli, Marco Panascì, Luis Eduardo Ranieri, Luca Pollastri, Stefania Brighenti, Luigi Molino, Ugo Riba, Livio Luzi, Piero Ruggeri, and Luca Filipas

(primary motor cortex, insular cortex, and prefrontal cortex [PFC]) with some studies showing positive effects, 2 – 5 and others no variation, 6 , 7 in performance results. The low focality of traditional tDCS may be responsible for this heterogeneity, producing excitatory or inhibitory effects in other

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Repeated Use of Transcranial Direct Current Stimulation Over the Dorsolateral Prefrontal Cortex Before Training Changes Visual Search and Improves Decision-Making Response Time in Soccer Athletes

Leonardo S. Fortes, Maicon R. Albuquerque, Heloiana K.C. Faro, Dalton de Lima-Júnior, Maria E.C. Ferreira, and Sebastião S. Almeida

cortex or dorsolateral prefrontal cortex (DLPFC), a-tDCS improves executive functions (e.g., inhibitory control and attention; Angius et al., 2019 ; Borducchi et al., 2016 ) and well-being in athletes ( Moreira et al., 2021 ). For example, Angius et al. ( 2019 ) found an improvement in Stroop task (i

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Effects of Upright and Recumbent Cycling on Executive Function and Prefrontal Cortex Oxygenation in Young Healthy Men

James Faulkner, Danielle Lambrick, Sebastian Kaufmann, and Lee Stoner

Background:

The purpose of this study was to assess the acute effects of posture (upright vs recumbent) during moderate-intensity cycle exercise on executive function and prefrontal cortex oxygenation in young healthy adults.

Methods:

Seventeen physically active men (24.6 ± 4.3 years) completed 2 30-minute submaximal exercise tests (conditions: upright and recumbent cycle ergometry). Executive function was assessed using the “color” and “word” Stroop task, preexercise (resting) and postexercise. Regional oxygen saturation (rSO2) to the prefrontal cortex was continuously monitored using near-infrared spectroscopy.

Results:

Significant improvements in executive function (Stroop color and word tasks) were observed after 30 minutes of exercise for both upright and recumbent cycling (P < .05). However, there were no differences in executive function between cycling conditions (P > .05). A significant increase in rSO2 was recorded immediately postexercise compared with preexercise for both conditions (P < .05), with a trend (P = .06) for higher peak rSO2 following recumbent cycling compared with upright cycling (81.9% ± 6.5% cf 79.7% ± 9.3%, respectively).

Conclusions:

Although submaximal cycling exercise acutely improves cognitive performance and prefrontal oxygenation, changes in cognition are not perceived to be dependent on body posture in young, healthy men.