ACCELERANS NERVE Meaning and
Definition
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Accelerans nerve is a term used in neurology and anatomy to describe a specific nerve fiber pathway involved in the autonomic nervous system. The accelerans nerve, also known as the cardiac sympathetic nerve, is a branch of the sympathetic nervous system that innervates the heart.
The accelerans nerve originates from the superior cervical ganglion, a cluster of nerve cells located near the base of the skull. It consists of postganglionic sympathetic fibers that pass downward through the neck and chest, ultimately reaching the heart. These nerve fibers play a crucial role in regulating heart rate and cardiac output.
When activated, the accelerans nerve releases neurotransmitters, such as norepinephrine, onto the heart's pacemaker cells and myocardial tissue. This sympathetic stimulation leads to an increased heart rate, enhanced force of contraction, and overall cardiovascular activation. These changes are part of the fight-or-flight response, preparing the body for physical exertion or stressful situations.
The accelerans nerve is essential for maintaining proper cardiovascular function, and any disruption or dysfunction within this pathway can result in heart rhythm abnormalities or cardiac dysfunction. Therefore, studying the accelerans nerve and its innervation of the heart is crucial for understanding the physiology of the autonomic nervous system and its role in cardiovascular regulation.
