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Related Concept Videos

Blood Flow01:29

Blood Flow

75.7K
Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
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Autoregulation of Blood Flow01:17

Autoregulation of Blood Flow

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Autoregulation mechanisms are characterized by their inherent capacity for self-regulation without necessitating specific nervous stimulation or endocrine control. These mechanisms facilitate the adjustment of blood flow and, therefore, perfusion specific to each tissue region. This self-regulation encompasses chemical signals and myogenic controls.
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation....
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Sound Intensity00:58

Sound Intensity

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The loudness of a sound source is related to how energetically the source is vibrating, consequently making the molecules of the propagation medium vibrate. To measure the loudness of a source, the physical quantity of interest is the intensity. This is defined as the energy emitted per unit of time per unit of area perpendicular to the sound wave's propagation direction. Since the total energy is greater if the source vibrates for a longer duration and over a larger area, dividing the...
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Sound Intensity Level00:53

Sound Intensity Level

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Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
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Exercise Stress Test01:26

Exercise Stress Test

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Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
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Increased Body Temperature01:25

Increased Body Temperature

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A body temperature above  38°C  (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in...
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Related Experiment Video

Updated: Jan 23, 2026

Impact of High-intensity Interval Exercise and Moderate-Intensity Continuous Exercise on the Cardiac Troponin T Level at an Early Stage of Training
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Impact of High-intensity Interval Exercise and Moderate-Intensity Continuous Exercise on the Cardiac Troponin T Level at an Early Stage of Training

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Hippocampal Blood Flow Is Increased After 20 min of Moderate-Intensity Exercise.

J J Steventon1,2,3, C Foster3, H Furby1,4

  • 1Neuroscience and Mental Health Research Institute, School of Medicine, Cardiff University, Cardiff, CF24 4HQ, UK.

Cerebral Cortex (New York, N.Y. : 1991)
|June 20, 2019
PubMed
Summary

A single bout of moderate exercise transiently boosts hippocampal blood flow, suggesting metabolic rather than vascular changes. This finding is key for understanding exercise benefits for brain health in aging and clinical populations.

Keywords:
MRIcerebral blood flowcerebrovascular reactivityhippocampusplasticity

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Area of Science:

  • Neuroscience
  • Exercise Physiology
  • Cardiovascular Science

Background:

  • Long-term exercise promotes neurogenesis and vascular plasticity.
  • The timing of exercise-induced vascular adaptations is not well understood.
  • Understanding these adaptations is crucial for therapeutic applications.

Purpose of the Study:

  • To determine if a single moderate-intensity exercise session induces cerebral vascular changes.
  • To investigate the temporal dynamics of exercise-induced cerebral blood flow and reactivity.

Main Methods:

  • Arterial spin labeling magnetic resonance imaging (ASL-MRI) measured cerebral blood flow (CBF).
  • Cerebrovascular reactivity (CVR) to CO2 was assessed.
  • Measurements were taken before and after a 20-minute cycling session.

Main Results:

  • CBF increased by 10-12% in the hippocampus 15, 40, and 60 minutes post-exercise.
  • CVR remained unchanged across all measured regions.
  • The observed hippocampal changes were not linked to mechanical vascular alterations.

Conclusions:

  • A single exercise session can induce immediate, transient metabolic changes in the hippocampus.
  • These findings provide a basis for exploring exercise's therapeutic potential in aging and clinical populations.
  • Exercise-induced plasticity may involve both neural and vascular mechanisms.