preganglionic fibers

(redirected from Pre-ganglionic)

pre·gan·gli·on·ic fi·bers

a fiber the cell body of which is located in an autonomic nucleus in the spinal cord or brainstem and the axon of which terminates in an autonomic (motor) ganglion; found in nerves conveying sympathetic or parasympathetic fibers.
References in periodicals archive ?
However, this low frequency stimulation when applied to the pre-ganglionic region reduces cardiac sympathetic activity (Sherry et al.
Aortic baroreceptors recognize blood pressure changes and generate an afferent signal to the caldoventrolateral region on the bulb, which inhibit the pre-ganglionic sympathetic neurons activity on the rostroventrolateral area in the bulb, resulting in decreases in heart rate, blood pressure, and peripheral vascular resistance (7).
They inhibit central neural transmission in the dorsal horn by presynaptic and postsynaptic mechanisms, and directly in spinal pre-ganglionic sympathetic nerves.
There, it synapses with second order neurons whose pre-ganglionic cell bodies give rise to axons, which exit the white rami communicantes of the spinal cord via the anterior horn and enter the sympathetic chain in the neck, synapsing in the superior cervical ganglion.
Type B: Herniation of a disc into the dural sheath in the pre-ganglionic region of the nerve root.
3,4) Notably, the first-ever published case was in the SAMJ and was thought to be a pre-ganglionic lesion.
Brachial plexus injuries usually involve either pre-ganglionic avulsion or post-ganglionic rupture.
8) This manner of forceful separation typically results in pre-ganglionic root avulsion or post-ganglionic rupture of the upper roots (C5-C6) while sparing the lower roots (C7, C8, T1).
These nerves carry pre-ganglionic fibers, pierce the diaphragmatic crura and supply the viscera through the plexuses (Standring, 2005).
Early hypotension observed in our RC group patients might be because of inhibition of spinal cord pre-ganglionic neural tone.
The two remaining sub-nuclei contain pre-ganglionic autonomic motor neurons whose axons comprise the parasympathetic outflow of the 3rd cranial nerve.
They inhibit central neural transmission in the dorsal horn by presynaptic and postsynaptic mechanisms and directly in spinal pre-ganglionic sympathetic nerves.