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Cerebrospinal Fluid Flow Dynamics during Handgrip Exercise in Young Healthy Adults: An MRI Study
Author(s) -
Tarumi Takashi,
Yamabe Takayuki,
Fukuie Marina,
Zhu David,
Zhang Rong,
Ogoh Shigehiko,
Sugawara Jun
Publication year - 2021
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.2021.35.s1.00415
Subject(s) - medicine , cerebral aqueduct , heart rate , magnetic resonance imaging , sss* , cerebral blood flow , cerebrospinal fluid , cardiology , hemodynamics , blood flow , stroke volume , respiratory rate , blood pressure , radiology
Cerebral blood flow (CBF) increases during exercise, but its impact on cerebrospinal fluid (CSF) flow remains unknown. This study investigated CBF and CSF flow dynamics during moderate‐intensity rhythmic handgrip (RHG) exercise in young healthy men and women. Twenty‐six participants (12 women) underwent the RHG and resting control conditions in random order. Participants performed 3 sets of RHG, during which CINE phase‐contrast magnetic resonance imaging (PC‐MRI) was performed to measure blood stroke volume (SV) and flow rate in the internal carotid (ICA) and vertebral (VA) arteries, the internal jugular vein (IJV), the superior sagittal (SSS) and straight sinuses (SRS), and CSF SV and flow rate in the cerebral aqueduct of Sylvius. Blood pressure, end‐tidal CO 2 (EtCO 2 ), heart rate (HR), and respiratory rate were simultaneously measured during CINE PC‐MRI scans. Compared with control conditions, RHG showed significant elevations of HR, mean arterial pressure, and respiratory rate with a mild reduction of EtCO 2 (all P <0.05). RHG decreased blood SV in the measured arteries, veins, and sinuses and CSF SV in the aqueduct (all P <0.05). Conversely, RHG increased blood flow in the ICA, VA, and IJV (all P <0.05). At the aqueduct, RHG decreased the absolute CSF flow rate ( P =0.031), which was calculated as a sum of the caudal and cranial CSF flow rates. Change in the ICA SV was positively correlated with changes in the IJV, SSS, SRS, and aqueductal SV during RHG (all P <0.05). These findings demonstrate a close coupling between the CBF and CSF flow dynamics during moderate‐intensity RHG exercise in young healthy adults.