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Doctor insights on: How Does The Brain Control The Heart

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The function of the spinal cord and how does it work with the brain?

The function of the spinal cord and how does it work with the brain?

Fiberoptic cables: Like phone cords, the brain connects down through the brainstem by tracts like fiberoptic cables connecting the motor/sensory areas of the brain to the areas of the spinal cord sending out nerves to your body. Long and very complex but wonderfully made! ...Read more

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How can the brain and kindneys control the blood pressure ?

Feedback mechanisms: Many things impact bp. Neural stimuli and catecholamine release impact on heart rate and vasoconstriction. Renal blood flow and kidney function control internal fluid and salt regulation, as well as having an influence on hormonal activity and feedback on the nervous system. All of this helps regulate bp. ...Read more

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How does the body control the level of calcitonin?

How does the body control the level of calcitonin?

Calcitonin: For starters please go online and look for an article or two - not a difficult one to understand - that discusses Calcitonin at a level you will understand. Any questions - give me a call. ...Read more

Dr. Irv Loh Dr. Loh
3 doctors agreed:
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How does electrical stimulation of the heart coordinate the cardiac cycle again?

Dr. Irv Loh Dr. Loh
3 doctors agreed:
How does electrical stimulation of the heart coordinate the cardiac cycle again?

Reset own pacemaker: Assuming query is about cardioversion. There are hierarchies of pacemaker cells in the heart. Fastest one usually takes over. Normal sinus node, then av node or "junction", then purkinje or ventricular pacemakers, in that approximate order. If there is a rhythm disturbance involving a faster abnormal rhythm, an electrical pulse carefully delivered can reset, and allow the fastest normal pacer. ...Read more

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How does the heart get oxygen if it's the organ that pumping the blood to the rest of the body?

How does the heart get oxygen if it's the organ that pumping the blood to the rest of the body?

Oxygen: Oxygenated blood leaves the pulmonary circulation and is pumped through the left side of the heart. After it goes through the aortic valve oxygenated blood flows in both systole and diastole through the coronary arteries into the heart muscle. ...Read more

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How does the pericardium improve the efficiency of the heart?

How does the pericardium improve the efficiency of the heart?

By not interfering: A healthy pericardium is a very flexible, thin tissue that is "just there." it generally serves little purpose, other than to allow the chambers of the heart to expand outwards in a normal fashion, without resistance, as they fill with blood. If pericardium becomes inflamed, thickened or hardened, the heart loses this outward mobility, and pressure rises greatly as the heart tries to fill. ...Read more

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What cause angina to affect the system and how it affect the system?

What cause angina to affect the system and how it affect the system?

Trouble for heart: Angina is an uncomfortable sensation from heart muscle suffering from lack of circulation - essentially acute oxygen deprivation. If this deprivation is not corrected, then a heart attack, with permanent heart muscle damage, can follow. Hope that helps. ...Read more

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How does secondary brain cancer get into the brain? Can it cross the blood brain barrier?

How does secondary brain cancer get into the brain? Can it cross the blood brain barrier?

Yes!: Cabncer cells travel via the blood and can get to the brain just like they do to all other body parts/sites. They are very invasive and are capable of breaking the blood brain barrier easily! ...Read more

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What is the aorta in the heart and how does it work with the rest of the circulatory system?

What is the aorta in the heart and how does it work with the rest of the circulatory system?

Main artery: The aorta is the main artery in the boday and is responsible for delivering blood to the rest of the body. ...Read more

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How EXACTLY does general anesthesia lead to heart attack, stroke or death? What are the mechanisms in the drug that leads to a stroke? How does it kil

How EXACTLY does general anesthesia lead to heart attack, stroke or death? What are the mechanisms in the drug that leads to a stroke? How does it kil

No single answer: Serious complications from GA are much more likely in pts who are already sick. If you have coronary artery disease, the stress of surgery and anesthesia can lead to heart attack. If you have already had a stroke, the same stresses can contribute to another. No one drug or technique is at fault. Surgery makes the body tend to form clots as part of healing. This can add to risk of stroke or MI. ...Read more

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How does electrical stimulation of the heart coordinate the overall cardiac cycle?

How does electrical stimulation of the heart coordinate the overall cardiac cycle?

Millisecond timing: The 2 atria act as reservoirs for returning blood; the 2 ventricles are the "pumpers". The 4 chambers must be coordinated with millisecond timing to maximize the amount of blood pumped (cardiac output). This is done by a network of specialized cells which are found in tracts or bundles that conduct a micro-electrical current to time motion. A gross analogy: think of the distributor in your car. ...Read more

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How does the brain work?

How does the brain work?

No problem: If you want to find out how the brain works, you can start with one of the standard references: Principles of Neural Science, by Kandel and Schwartz. I have the fifth edition. It's 1709 pages long. It covers the basics. It's an introduction. If you really want to get into the subject, there are more and bigger books you can read. ...Read more

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How does tiny arteries to the heart affect procedures?

How does tiny arteries to the heart affect procedures?

Ensure blood supply: The question is a little vague but i will try to explain. The small arteries to the heart (the coronary arteries) are what supply blood to the hearyt to keep it pumping. The big artery from the heart supplies the systemic circulation. If the small arteries get blocked, then you have a heart attack and may die. Any surgical proceedure may put enough stress on the heart to have a heart attack. ...Read more

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How does the acetylcholine affect the blood vessels?

How does the acetylcholine affect the blood vessels?

ACH effect on BV: M3 muscarinic ach receptors are located in smooth muscles of blood vessels. Because they're gq-coupled & mediate increase in intracellular calcium, they typically cause contraction of smooth muscle (as in bronchi). But activation of m3 on vascular endothelial cells causes increased synthesis of nitric oxide, which diffuses to adjacent vascular smooth muscle cells and causes their relaxation. ...Read more

Dr. Alan Ali Dr. Ali
6 doctors agreed:
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What does olanzapine do to the biology of the brain?

Dr. Alan Ali Dr. Ali
6 doctors agreed:
What does olanzapine do to the biology of the brain?

Olanzapine: Zyprexa (olanzapine) is an atypical psychotropic that affect Dopamine receptors, hence lowers Dopamine levels & reduces psychotic symptoms. ...Read more

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How will herion affect the brain in the long term?

How will herion affect the brain in the long term?

It destroys lives: Heroin use/addiction destroys many lives, the users and their family and friends, and negatively affect society in general (huge healthcare recourse/cost burden). Some of the effects on the brain itself is pictured here. It also affect your circulatory/respiratory system. Stop it now and seek help--only u can turn your life around. Life is precious. Be good. Be alive! good luck. ...Read more

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