White ramus communicans
Encyclopedia
The thoracic, and the first and second lumbar nerves
each contribute a branch, white ramus communicans to the adjoining sympathetic ganglion.
They contain myelinated preganglionic sympathetic
fibers (GVE
and GVA
).
Unlike the gray rami, white rami communicantes do not extend below L2 or above T1.
Lumbar nerves
The lumbar nerves are the five spinal nerves emerging from the lumbar vertebrae. They are divided into posterior and anterior divisions.-Posterior divisions:...
each contribute a branch, white ramus communicans to the adjoining sympathetic ganglion.
They contain myelinated preganglionic sympathetic
Sympathetic nervous system
The sympathetic nervous system is one of the three parts of the autonomic nervous system, along with the enteric and parasympathetic systems. Its general action is to mobilize the body's nervous system fight-or-flight response...
fibers (GVE
General visceral efferent fibers
The general visceral efferent fibers , probably arise from cells in the lateral column or the base of the anterior column and emerge through the anterior roots and white rami communicantes....
and GVA
General visceral afferent fibers
The general visceral afferent fibers conduct sensory impulses from the viscera, glands, and blood vessels to the central nervous system. They are considered to be part of the autonomic nervous system...
).
Unlike the gray rami, white rami communicantes do not extend below L2 or above T1.