Sympathetic Part Lower center. located in intermediolateral nucleus(lateral gray horn) of spinal cord segments T1-L2 or L3 Sympathetic ganglia Paravertebral ganglia Prevertebral ganglia Transverse section of upper lumbar segment10 Sympathetic Part  Lower center: located in intermediolateral nucleus (lateral gray horn) of spinal cord segments T1~L2 or L3  Sympathetic ganglia  Paravertebral ganglia  Prevertebral ganglia Transverse section of upper lumbar segment