Which region of the spinal cord contains the lateral horns, which are associated with autonomic motor neurons?

• A. Thoracic region
• B. Lumbar region
• C. Cervical region
• D. Sacral region

Answer: (A)

Verified step by step guidance

1. Understand the anatomy of the spinal cord: The spinal cord is divided into regions—cervical, thoracic, lumbar, sacral, and coccygeal. Each region has distinct structural and functional characteristics.
2. Learn about lateral horns: Lateral horns are specific structures in the spinal cord gray matter that house autonomic motor neurons. These neurons are part of the autonomic nervous system, which controls involuntary functions like heart rate and digestion.
3. Identify the regions where lateral horns are present: Lateral horns are typically found in the thoracic and upper lumbar regions of the spinal cord. These regions are associated with the sympathetic division of the autonomic nervous system.
4. Eliminate incorrect options: Cervical and sacral regions do not contain lateral horns. The sacral region is associated with the parasympathetic division but lacks lateral horns.
5. Conclude the correct answer: Based on the presence of lateral horns, the thoracic and lumbar regions are correct. The thoracic region is most commonly associated with lateral horns and autonomic motor neurons.