The sympathetic system is also called the:

1. The name reflects where its fibres emerge. 2. They come from thoracic and upper lumbar cord. 3. It is referred to as the thoracolumbar system to reflect this anatomical basis. 4. So the answer is thoracolumbar. _Source: OpenStax 'Anatomy and Physiology 2e', Ch 15 'The Autonomic Nervous System'_