Take the 2-minute tour ×
Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It's 100% free, no registration required.

I am trying to understand the effect of aging on the sympathetic fibers of SA node. I know that aging shifts the vagal curve to left in frequency due to aging. However, I am interested if aging has similar effect on sympathetic fibers.

In young heart, heart's intrinsic functions can work with simultaneous parasympathetic and sympathetic processes. If there is no change in the sympathetic function, then those processes have to happen at different times. I am having this kind of schematic picture in my mind:

enter image description here

where intrinsic functions occur in 100-110 BPM normally. However, aging shifts V1 to V2, no intersection anymore between V2 and S1.

What is the effect of aging on the sympathetic fibers of SA node?

share|improve this question

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.