Cardiac nerve
Cardiac Nerve
The Cardiac Nerve (pronunciation: /ˈkɑːrdiæk nɜːrv/) is a term used in the field of medicine to refer to any nerve that innervates the heart.
Etymology
The term "Cardiac Nerve" is derived from the Greek words "kardia" meaning heart and "neuron" meaning nerve.
Function
The Cardiac Nerves are responsible for the regulation of the heart rate and heart rhythm. They are part of the autonomic nervous system, which controls involuntary body functions. The Cardiac Nerves include the vagus nerve, which slows the heart rate, and the sympathetic cardiac nerves, which increase the heart rate.
Related Terms
- Vagus Nerve: The tenth cranial nerve that interfaces with the parasympathetic control of the heart, lungs, and digestive tract.
- Sympathetic Nervous System: The part of the autonomic nervous system that serves to speed up the heart rate, contract blood vessels, and raise blood pressure.
- Parasympathetic Nervous System: The part of the autonomic nervous system that slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles.
- Autonomic Nervous System: The part of the nervous system responsible for control of the bodily functions not consciously directed, such as breathing, the heartbeat, and digestive processes.
External links
- Medical encyclopedia article on Cardiac nerve
- Wikipedia's article - Cardiac nerve
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