SDK
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Parasympathatic effect on heart is dec: contractility...dec: heart rate..thru vagal stimulation......
In bainbridge reflex vagal stimulation cause inc: heart rate.....how??? explain in detail????
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| KEROCHI
Forum Guru
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Bainbridge Reflex- aka cardiovascular reflex, Right Heart reflex
-causes acceleration of heartbeat following the stimulation of local muscle spindles when blood pressure in the venae cavae& right atrium is increased.
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| mildus
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it is involved in maintaining blood pressure, when preload is increased - it increases heart rate in order not to allow excess blood accumulation in heart; Ganong says that neither its physiological significance nor its exact mechanism are understood, he also says that it is probably a true reflex because it is abolished by bilateral vagotomy. Ganong also thinks that Bainbridge reflex competes with baroreceptor reflex because their roles are opposite
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| SDK
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how vagus has both tachycardic & bradycardic effect???? it is pure parasympathatic nerve....
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| mildus
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I don't know, maybe it is inhibition of vagus which is responsible for tachycardia (receptors decrease vagus activity so increasing heart rate)
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