Sometimes you may have atrial flutter that develops into atrial fibrillation and vice versa. The risk factors for and the symptoms and causes of atrial flutter are similar to those of atrial fibrillation. For example, strokes are also a concern in someone with atrial flutter. As with atrial fibrillation, atrial flutter is usually not life-threatening when it's properly treated.
Nerves and Nerve Types. There three types of nerves in the central nervous system: motor neurons, sensory neurons and autonomic neurons. Motor nerves send impulses or signals from the brain and spinal cord to all of the muscles in the body.
A nerve cell, or neuron, is the basic unit of the nervous system. It transmits information to and from the brain. The structure of a neuron allows the transmission to be quick.1  The Structure & Function of Muscle Cells.2  What Is the Function of Blood Cells? nerve cell, or neuron, is the basic unit of the nervous system. It transmits information to and from the brain. The structure of a neuron allows the transmission to be quick. 1  The Structure & Function of Muscle Cells. 2  What Is the Function of Blood Cells?