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Related Concept Videos

Neural Regulation of Blood Pressure01:18

Neural Regulation of Blood Pressure

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The neural regulation of blood pressure involves intricate interactions between the autonomic nervous system (ANS) and cardiovascular system, ensuring adequate perfusion of tissues. This regulation primarily occurs through baroreceptor and chemoreceptor reflexes, involving both short-term and long-term mechanisms.
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
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Blood Pressure01:30

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Blood pressure (BP) is the pressure or force of blood exerted on the artery's walls as it circulates through the body. It is essential for maintaining blood flow throughout the body.
The average BP in an adult is typically around 120/80 mmHg (millimeters of mercury). In this measurement, the numerator (120) indicates the systolic pressure, which is the pressure in the arteries during the contraction of the heart's ventricles as blood is expelled. The denominator (80) represents the...
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Blood Pressure01:24

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The movement of blood in a human body, commonly referred to as blood flow, is determined by the volume of blood that traverses a certain section of the bodily system per unit time. It is the rhythmic contraction of the heart's ventricles that primarily instigates this movement. As the ventricles contract, blood is forced into the prominent arteries, which then flow from areas of greater pressure to lower pressure areas. This movement continues into smaller arteries and arterioles and...
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Hypertension and Regulation of Blood Pressure01:18

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Hypertension, the most common cardiovascular disease, is diagnosed through repeated measurements of elevated blood pressure. Its risks, including damage to the kidney, heart, and brain, are directly proportional to blood pressure levels. Starting from 115/75 mm Hg, the risk of cardiovascular disease doubles with each increment of 20/10 mm Hg. The diagnosis relies on blood pressure measurements, not on patient symptoms, as hypertension is often asymptomatic until end-organ damage is imminent or...
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Hormonal Regulation of Blood Pressure01:17

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Endocrinal or hormonal intervention in the cardiovascular system is predominantly exerted by the catecholamines - epinephrine and norepinephrine, as well as a slew of hormones that interact with renal function to modulate blood volume.
Epinephrine and Norepinephrine
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Hormonal Regulation01:33

Hormonal Regulation

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The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
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Updated: Feb 18, 2026

Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression
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Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression

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Cortical Structures Associated With Human Blood Pressure Control.

Nuria Lacuey1, Johnson P Hampson1, Wanchat Theeranaew2,3

  • 1Epilepsy Center, University Hospitals Cleveland Medical Center, Cleveland, Ohio.

JAMA Neurology
|November 29, 2017
PubMed
Summary
This summary is machine-generated.

Stimulating Brodmann area 25 in the brain significantly lowered systolic blood pressure in epilepsy patients. This area may be involved in sudden unexpected death in epilepsy (SUDEP) by causing hypotension.

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Area of Science:

  • Neuroscience
  • Cardiovascular Physiology
  • Epilepsy Research

Background:

  • Understanding cortical control of blood pressure is crucial for managing cardiovascular events.
  • Sudden unexpected death in epilepsy (SUDEP) may involve cardiovascular collapse.
  • Identifying brain regions influencing blood pressure can inform neurological and cardiac care.

Purpose of the Study:

  • To pinpoint specific cortical regions that regulate human blood pressure.
  • To investigate the role of the subcallosal cortex (Brodmann area 25) in blood pressure control.

Main Methods:

  • Prospective case series involving 12 epilepsy patients undergoing intracranial electrode implantation.
  • Electrical stimulation of various cortical regions including the amygdala, hippocampus, insula, orbitofrontal cortex, temporal lobe, cingulate gyrus, and subcallosal cortex.
  • Continuous, noninvasive monitoring of beat-by-beat blood pressure, heart rate, and other physiological parameters.

Main Results:

  • Stimulation of Brodmann area 25 in 4 patients resulted in significant systolic hypotension.
  • Hypotension was attributed to reduced sympathetic drive and cardiac output, not bradycardia or vasodilation.
  • No other stimulated cortical areas demonstrated significant blood pressure alterations.

Conclusions:

  • Brodmann area 25 plays a key role in reducing systolic blood pressure in humans.
  • This region is identified as a potential symptomatogenic zone for peri-ictal hypotension in epilepsy.
  • Findings contribute to understanding the neurobiological underpinnings of blood pressure regulation and SUDEP.