Sympathetic level for the gonads.

Sympathetic level for the gonads.

• A. T10-11
• B. T9-11
• C. T10-L2
• D. C2-Vagus

Answer: (A)

Sympathetic innervation to the gonads comes from preganglionic neurons in the lower thoracic spinal cord, specifically around the T10–T11 levels. These fibers travel via the lesser (thoracic) splanchnic nerves to the renal/aorticorenal ganglia and then follow the gonadal arteries to the testes or ovaries, providing vasomotor and other sympathetic effects. Because the gonads originate high in the abdomen and innervation follows the thoracic preganglionic route, the relevant spinal levels are around T10–T11, not higher cervical levels or sacral levels. This arrangement also helps explain why gonadal pain is referred to the T10 dermatome.

Sympathetic innervation to the gonads comes from preganglionic neurons in the lower thoracic spinal cord, specifically around the T10–T11 levels. These fibers travel via the lesser (thoracic) splanchnic nerves to the renal/aorticorenal ganglia and then follow the gonadal arteries to the testes or ovaries, providing vasomotor and other sympathetic effects. Because the gonads originate high in the abdomen and innervation follows the thoracic preganglionic route, the relevant spinal levels are around T10–T11, not higher cervical levels or sacral levels. This arrangement also helps explain why gonadal pain is referred to the T10 dermatome.