NCIt definition : A cluster of nerve cell bodies located within one of two paravertebral columns comprised
of bundled nerve fibers that extend from the base of the skull to the first coccygeal
vertebrae, or in a subsidiary location within the sympathetic nervous system. Sympathetic
ganglia play a major role in the fight or flight and other stress-mediated responses.;
Alternative definition : CDISC: A mass containing the cell bodies of sympathetic nerves. Sympathetic ganglia
exist as paravertebral ganglia (located bilaterally adjacent to the spinal cord) or
prevertebral ganglia (located close to the target organ).;