The sympathetic division originates from which region?

The sympathetic division originates from which region?

• A. Craniosacral
• B. Thoracolumbar
• C. Brainstem
• D. Sacral

Answer: (B)

The sympathetic division arises from the thoracic and upper lumbar regions of the spinal cord, giving it a thoracolumbar outflow. Specifically, the preganglionic neurons are located in the intermediolateral column of T1–L2, exit the spinal cord, and synapse in nearby sympathetic chain or collateral ganglia before reaching target organs with postganglionic fibers. This setup contrasts with the parasympathetic division, which comes from the brainstem and sacral segments (cranial nerves and S2–S4). So the origin is the thoracolumbar region.

The sympathetic division arises from the thoracic and upper lumbar regions of the spinal cord, giving it a thoracolumbar outflow. Specifically, the preganglionic neurons are located in the intermediolateral column of T1–L2, exit the spinal cord, and synapse in nearby sympathetic chain or collateral ganglia before reaching target organs with postganglionic fibers. This setup contrasts with the parasympathetic division, which comes from the brainstem and sacral segments (cranial nerves and S2–S4). So the origin is the thoracolumbar region.