Sinoatrial

... with nerves especially the cranial and medulla oblongata it extend all the way from the cranial to the anus nerve. You once said that the (SA )or sinoatrial node can keep the heart beating alone how. I still have not found actually what nerve but I think it is the Vagus nerve who is the boss Man ...

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It is important to note the sinoatrial (SA) node when mentioning heart rhythms as well. This provides sympathetic innervation of the myocardial muscle, the electrical signals are propogated the same way a defibulator works: a signal originates ...

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... to another. If the pacemaker cells get damaged(could happen if depolarisation is induced in the refractary period) the impulse won't get from the sinoatrial node to the rest of the heart. The heart simply stops. Just a hypothesis...

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PLEASE STATE YOUR QUESTIONS CLEARLY. AND THIS IS NOT A PLACE TO IRONY SOME ONE. The sinoatrial node (abbreviated SA node or SAN, also called the sinus node) is the impulse generating (pacemaker) tissue located in the right atrium of the heart. It is a group of cells ...

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... all of the heart's cells possess the ability to generate the electrical impulses (or action potentials) that trigger cardiac contraction, the sinoatrial node is what normally initiates it, simply because it generates impulses slightly faster than the other areas with pacemaker potential. Because ...

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