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  1. Article ; Online: Cardiac output-mediated regulation of cerebral blood flow during exercise: Clinical perspectives on the indirect impact of muscle metaboreflex.

    Ogoh, Shigehiko

    Experimental physiology

    2024  

    Abstract: The muscle metaboreflex stimulates the elevation of arterial blood pressure, aiming to rectify the oxygen deficit by enhancing oxygen delivery to support muscle activity. Moreover, activating the muscle metaboreflex significantly increases cardiac output ...

    Abstract The muscle metaboreflex stimulates the elevation of arterial blood pressure, aiming to rectify the oxygen deficit by enhancing oxygen delivery to support muscle activity. Moreover, activating the muscle metaboreflex significantly increases cardiac output (CO) by increasing factors such as heart rate, ventricular contractility, preload, stroke volume and mobilization of central blood volume. Previous studies indicate that ageing and cardiovascular diseases modify the muscle metaboreflex during exercise, limiting the ability to increase CO during physical activity. Alongside reduced exercise capacity, the attenuated rise in CO due to abnormal muscle metaboreflex in these patients impedes the increase in cerebral blood flow during exercise. Considering that CO plays a pivotal role in regulating cerebral blood flow adequately during exercise, this occurrence might contribute to an elevated risk of cerebral diseases, and it could also, at least, reduce the effective role of exercise in preventing cerebral disease and dementia among elderly individuals and patients with cardiovascular conditions. Therefore, it is important to consider this phenomenon when optimizing the effectiveness of exercise rehabilitation in patients with cardiovascular disease to prevent cerebral diseases and dementia.
    Language English
    Publishing date 2024-03-18
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1016295-1
    ISSN 1469-445X ; 0958-0670
    ISSN (online) 1469-445X
    ISSN 0958-0670
    DOI 10.1113/EP091591
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Acute and Chronic Effect of Physiological Factors on Arterial Stiffness.

    Ogoh, Shigehiko

    Journal of clinical medicine

    2023  Volume 12, Issue 8

    Abstract: Arterial stiffness is a disease of the arterial media, and it is well known that it is accelerated by aging [ ... ]. ...

    Abstract Arterial stiffness is a disease of the arterial media, and it is well known that it is accelerated by aging [...].
    Language English
    Publishing date 2023-04-21
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm12083044
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  3. Article ; Online: Point/counterpoint: Arterial blood pressure response to exercise does relate to exercise-induced improvement in cognitive function.

    Washio, Takuro / Ogoh, Shigehiko

    Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism

    2023  Volume 43, Issue 4, Page(s) 610–612

    Abstract: Exercise is a beneficial intervention to prevent cognitive dysfunction. However, an optimal exercise prescription for preventing dementia has not been established because the physiological mechanism(s) of exercise-induced improvements in cognitive ... ...

    Abstract Exercise is a beneficial intervention to prevent cognitive dysfunction. However, an optimal exercise prescription for preventing dementia has not been established because the physiological mechanism(s) of exercise-induced improvements in cognitive function remains unclear. Interestingly, our recent study demonstrated that individuals with a higher exercise pressor response exhibit less exercise-induced cognitive improvement, suggesting that individual differences in cardiovascular responses to exercise or its associated physiological factors, may be related to exercise-induced alterations in cognitive function. Therefore, consideration of individual cardiovascular responses is warranted to develop appropriate exercise prescriptions for a given individual to prevent cognitive dysfunction.
    MeSH term(s) Humans ; Arterial Pressure ; Cognition ; Cognitive Dysfunction/prevention & control ; Exercise ; Vasoconstrictor Agents ; Blood Pressure ; Reflex ; Muscle, Skeletal ; Muscle Contraction
    Chemical Substances Vasoconstrictor Agents
    Language English
    Publishing date 2023-01-26
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 604628-9
    ISSN 1559-7016 ; 0271-678X
    ISSN (online) 1559-7016
    ISSN 0271-678X
    DOI 10.1177/0271678X231153734
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  4. Article ; Online: Response to Letter to Editor - Comments on: Sympathetic vasomotor outflow during low-intensity leg cycling in healthy older males.

    Katayama, Keisho / Ogoh, Shigehiko

    Experimental physiology

    2023  Volume 108, Issue 2, Page(s) 320–322

    MeSH term(s) Male ; Humans ; Leg/physiology ; Blood Pressure/physiology ; Sympathetic Nervous System/physiology
    Language English
    Publishing date 2023-01-12
    Publishing country England
    Document type Letter ; Research Support, Non-U.S. Gov't ; Comment
    ZDB-ID 1016295-1
    ISSN 1469-445X ; 0958-0670
    ISSN (online) 1469-445X
    ISSN 0958-0670
    DOI 10.1113/EP091030
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  5. Article ; Online: Interaction between the respiratory system and cerebral blood flow regulation.

    Ogoh, Shigehiko

    Journal of applied physiology (Bethesda, Md. : 1985)

    2019  Volume 127, Issue 5, Page(s) 1197–1205

    Abstract: This review summarizes the interaction between the regulatory system of respiration and cerebral vasculature. Some clinical reports provide evidence for the association between these two physiological regulatory systems. Physiologically, arterial carbon ... ...

    Abstract This review summarizes the interaction between the regulatory system of respiration and cerebral vasculature. Some clinical reports provide evidence for the association between these two physiological regulatory systems. Physiologically, arterial carbon dioxide concentration is mainly regulated by two feedback control systems: respiration and cerebral blood flow. In other words, both of these systems are sensitive to the same mediator, i.e., carbon dioxide, at a set point. In addition, respiratory dysfunction alters various physiological factors that affect the cerebral vasculature. Therefore, it is physiologically plausible that these systems are closely linked. The regulation of arterial carbon dioxide concentration affected by respiration and cerebral blood flow may be a key factor for a rise in the risk of brain disease in the patients with respiratory dysfunction. For example, the management of respiratory disease (e.g., patients with chronic obstructive pulmonary disease) and the use of prophylactic therapy are essential to reduce the risk of stroke.
    MeSH term(s) Animals ; Baroreflex/physiology ; Blood Flow Velocity/physiology ; Cerebrovascular Circulation/physiology ; Humans ; Respiratory Mechanics/physiology ; Respiratory Physiological Phenomena ; Respiratory System
    Language English
    Publishing date 2019-03-28
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 219139-8
    ISSN 1522-1601 ; 0021-8987 ; 0161-7567 ; 8750-7587
    ISSN (online) 1522-1601
    ISSN 0021-8987 ; 0161-7567 ; 8750-7587
    DOI 10.1152/japplphysiol.00057.2019
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  6. Article ; Online: Why do African Americans have a higher risk for cerebral disease?

    Ogoh, Shigehiko

    Experimental physiology

    2018  Volume 103, Issue 3, Page(s) 310–311

    MeSH term(s) African Americans ; European Continental Ancestry Group ; Humans ; Risk Factors
    Language English
    Publishing date 2018-01-24
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 1016295-1
    ISSN 1469-445X ; 0958-0670
    ISSN (online) 1469-445X
    ISSN 0958-0670
    DOI 10.1113/EP086862
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  7. Article ; Online: Chronic obstructive pulmonary disease-induced autonomic dysfunction may be associated with cerebral blood flow regulation and brain function.

    Ogoh, Shigehiko

    Experimental physiology

    2018  Volume 103, Issue 8, Page(s) 1045–1046

    MeSH term(s) Autonomic Nervous System Diseases ; Brain ; Cerebrovascular Circulation ; Humans ; Hypoxia ; Oxygen ; Pulmonary Disease, Chronic Obstructive
    Chemical Substances Oxygen (S88TT14065)
    Language English
    Publishing date 2018-07-05
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 1016295-1
    ISSN 1469-445X ; 0958-0670
    ISSN (online) 1469-445X
    ISSN 0958-0670
    DOI 10.1113/EP087173
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  8. Article ; Online: Relationship between cognitive function and regulation of cerebral blood flow.

    Ogoh, Shigehiko

    The journal of physiological sciences : JPS

    2017  Volume 67, Issue 3, Page(s) 345–351

    Abstract: Ageing is the primary risk factor for cognitive deterioration. Given that the cerebral blood flow (CBF) or regulation of cerebral circulation is attenuated in the elderly, it could be expected that ageing-induced cognitive deterioration may be affected ... ...

    Abstract Ageing is the primary risk factor for cognitive deterioration. Given that the cerebral blood flow (CBF) or regulation of cerebral circulation is attenuated in the elderly, it could be expected that ageing-induced cognitive deterioration may be affected by a decrease in CBF as a result of brain ischemia and energy depletion. CBF regulation associated with cerebral metabolism thus likely plays an important role in the preservation of cognitive function. However, in some specific conditions (e.g. during exercise), change in CBF does not synchronize with that of cerebral metabolism. Our recent study demonstrated that cognitive function was more strongly affected by changes in cerebral metabolism than by changes in CBF during exercise. Therefore, it remains unclear how an alteration in CBF or its regulation affects cognitive function. In this review, I summarize current knowledge on previous investigations providing the possibility of an interaction between regulation of CBF or cerebral metabolism and cognitive function.
    MeSH term(s) Aging/physiology ; Brain/physiology ; Brain Ischemia/physiopathology ; Cerebrovascular Circulation/physiology ; Cognition/physiology ; Exercise/physiology ; Homeostasis/physiology ; Humans
    Language English
    Publishing date 2017-02-03
    Publishing country Japan
    Document type Journal Article ; Review
    ZDB-ID 2234472-X
    ISSN 1880-6562 ; 1880-6546
    ISSN (online) 1880-6562
    ISSN 1880-6546
    DOI 10.1007/s12576-017-0525-0
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  9. Article ; Online: What is important for aging-induced arterial stiffening, autonomic dysfunction, vascular characteristics or both?

    Ogoh, Shigehiko

    Hypertension research : official journal of the Japanese Society of Hypertension

    2017  Volume 40, Issue 5, Page(s) 434–435

    MeSH term(s) Aging ; Arteries ; Vascular Stiffness
    Language English
    Publishing date 2017
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 1175297-x
    ISSN 1348-4214 ; 0916-9636
    ISSN (online) 1348-4214
    ISSN 0916-9636
    DOI 10.1038/hr.2017.8
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  10. Article ; Online: Handgrip exercise does not alter CO

    Saito, Shotaro / Watanabe, Hironori / Iwamoto, Erika / Ogoh, Shigehiko

    Experimental physiology

    2023  Volume 108, Issue 10, Page(s) 1337–1346

    Abstract: Handgrip exercise (HG), a small muscle exercise, improves cognitive function and is expected to provide a useful exercise mode to maintain cerebral health. However, the effect of HG on cerebral blood flow regulation is not fully understood. The present ... ...

    Abstract Handgrip exercise (HG), a small muscle exercise, improves cognitive function and is expected to provide a useful exercise mode to maintain cerebral health. However, the effect of HG on cerebral blood flow regulation is not fully understood. The present study aimed to examine the effect of acute HG on cerebral endothelial function as one of the essential cerebral blood flow regulatory functions. Thirteen healthy young participants performed interval HG, consisting of 4 sets of 2 min HG at 25% of maximum voluntary contraction with 3 min recovery between each set. Cognitive performance was evaluated before and at 5 and 60 min after interval HG using the Go/No-Go task (reaction time and accuracy). The diameter and blood velocity of the internal carotid artery (ICA) were measured using a duplex Doppler ultrasound system. To assess cerebral endothelial function, hypercapnia (30 s of hypercapnia stimulation, end-tidal partial pressure of CO
    MeSH term(s) Humans ; Carotid Artery, Internal/physiology ; Carbon Dioxide ; Hypercapnia ; Dilatation/methods ; Hand Strength/physiology ; Blood Flow Velocity/physiology ; Cerebrovascular Circulation/physiology
    Chemical Substances Carbon Dioxide (142M471B3J)
    Language English
    Publishing date 2023-08-25
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1016295-1
    ISSN 1469-445X ; 0958-0670
    ISSN (online) 1469-445X
    ISSN 0958-0670
    DOI 10.1113/EP091125
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