Effects of hypocapnia and hypercapnia on human somatosensory processing

Nakata, Hiroki; Kakigi, Ryusuke; Kubo, Hiroko; Shibasaki, Manabu

doi:10.1016/j.neures.2022.11.007

Cited by 2 publications

(1 citation statement)

References 47 publications

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“…Indeed, overground walking affected the heart rate, mean arterial blood pressure, and prefrontal oxy-Hb and deoxy-Hb 38) . However, our previous studies showed no significant differences in mean arterial blood pressure and end-tidal PCO2 between resting and cognitive tasks 43,44) . Since the present study used motor imagery and action observation conditions rather than exercise tasks such as treadmill walking and a cycle ergometer, we considered the influence of these physiological factors to be limited.…”

Section: Correlation Analysismentioning

confidence: 75%

Motor imagery and action observation of whole-body movements for experienced motor repertoire: an fNIRS study

Yokota

Kamijo

Mizuguchi

et al. 2023

JPFSM

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The present study used functional near-infrared spectroscopy (fNIRS), and investigated the characteristics of hemodynamic responses of oxy-Hb and deoxy-Hb during motor imagery and action observation for whole-body movements. Sixteen female participants performed tasks under two conditions: motor imagery and action observation. Each condition included three tasks of whole-body movement of gymnastics: (1) forward roll, (2) backward roll, and (3) cartwheel. Under both motor imagery and action observation conditions, the mean amplitude of oxy-Hb in the left posterior parietal cortex (PPC) was significantly more positive for the forward roll than cartwheel. The mean amplitude of deoxy-Hb was significantly more negative for the cartwheel than forward roll in the middle PPC. These findings suggest that PPC plays an important role in representations of movement during motor imagery and action observation. In addition, correlations between the vividness of motor imagery and mean amplitudes of oxy-Hb were identified in the premotor and primary motor areas. These results suggest that psychological assessments for vividness are linked to neural motor processes, and may provide a valid and economic tool to evaluate a person's ability to perform motor imagery.

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Section: Correlation Analysismentioning

confidence: 75%

Motor imagery and action observation of whole-body movements for experienced motor repertoire: an fNIRS study

Yokota

Kamijo

Mizuguchi

et al. 2023

JPFSM

Self Cite

View full text Add to dashboard Cite

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Do changes in cerebral blood flow modulate the amplitudes of P300 during cognitive task?

Ogoh,

Nakata,

Kubo

et al. 2024

Journal of Applied Physiology

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A single session of aerobic or resistance training transiently enhances cognitive function, making it a valuable strategy for dementia prevention in the older people. Despite its acknowledged benefits, the precise mechanism behind exercise-induced cognitive improvement remains controversial. In the present study, we investigated the impact of altered cerebral blood flow (CBF) on brain neural activity originating from motor executive and inhibitory processing using electroencephalographic event-related potentials (EEG-ERPs). Sixteen healthy subjects participated in four sessions, with EEG-ERPs measured during somatosensory Go/No-go tasks. The sessions were conducted under four distinct respiratory conditions presented in random order: normal breathing (NB) and rapid breathing (RB) with room air, normal breathing with hypercapnic gas (5% CO2, 21% O2, and balanced N2) (NB+Gas), and rapid breathing with the same gas (RB+Gas). Changes in CBF were evaluated based on the middle cerebral artery mean blood velocity (MCA Vmean) using transcranial Doppler. PETCO2 was decreased under the RB condition but increased under the NB+Gas condition, thereby decreasing and increasing MCA Vmean, respectively. Under the NB+Gas condition, MCA Vmean significantly increased, but it had no effect on either the executive or inhibitory function. In contrast, the reduction in MCA Vmean induced by RB decreased the peak amplitudes of Go-P300 and No-go-P300. However, even under the RB+Gas condition while MCA Vmean increased, the peak amplitudes of both also decreased. These findings suggest that neither increases nor decreases in CBF affected cognitive function.

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Effects of hypocapnia and hypercapnia on human somatosensory processing

Cited by 2 publications

References 47 publications

Motor imagery and action observation of whole-body movements for experienced motor repertoire: an fNIRS study

Motor imagery and action observation of whole-body movements for experienced motor repertoire: an fNIRS study

Do changes in cerebral blood flow modulate the amplitudes of P300 during cognitive task?

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