Pressor and depressor reflexes

Location receptors in the heart of self-regulation provides a reflex cardiac activity. Rapid heartbeat irritation at heart discovered VN Great and Pavlov (1874).
Cardio-cardiac or own reflections on the heart are obtained as follows. Irritation receptors arising from a change in blood pressure in the cavities of the heart, the heart muscle under tension or cause the formation of reducing afferent impulses coming as part of the vagus nerve in the medulla oblongata. Hence come efferent impulses governing the angry, because she reflexively accelerates or decelerates, strengthens weakened IPT. By increasing the boiling point in the heart or the pressure on the heart outside the heart activity slows. Reflex disappears after section of both vagus nerves, therefore, it is transmitted via the vagus nerves.

Increased pressure in the mouth of the hollow claim and in the right atrium causes an acceleration of cardiac activity (Bainbridge, 1914), which is due to vagal tone and arousal of the sympathetic nerves. Stimulation of receptors coronary heart slows down the heartbeat.

There is a reflex to the heart with the pericardium. Stretching or irritation of the pericardium causes a slowing or reflex heart failure (P. Goncharov, 1936).

The reflex control of heart particularly important role played by afferent impulses coming into the nervous system of many reflex zones, located in the blood vessels.

Vistserokardialnye or reflections on the heart during stimulation of the internal organs. Severe irritation of the abdominal cavity causing reflex cardiac arrest (Goltz, 1863). This reflex is it found in all vertebrates and humans. Afferent fibers, which carry impulses from the abdominal cavity, leading to reflex cardiac arrest, pass through the spinal cord, the vagus nerves and the sympathetic trunks (VM Mühlberg, 1947). Irritation receptors of internal organs slows down and stops the heart, reaching the nucleus of the vagus nerves in the medulla oblongata. During stimulation of internal organs occurs as a reflex acceleration of cardiac activity.

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