Where is the dorsal motor nucleus located?

Where is the dorsal motor nucleus located?

• A. Upper medulla
• B. Lower medulla
• C. Pons
• D. Midbrain

Answer: (A)

The dorsal motor nucleus of the vagus is located in the medulla oblongata, specifically on the dorsal aspect near the floor of the fourth ventricle. This places it in the upper portion of the medulla. It contains the preganglionic parasympathetic neurons that give rise to the vagus nerve fibers innervating thoracic and abdominal viscera. The pons and midbrain do not house this nucleus, and the region is karakteristically within the dorsal medullary area, i.e., the upper medulla.

The dorsal motor nucleus of the vagus is located in the medulla oblongata, specifically on the dorsal aspect near the floor of the fourth ventricle. This places it in the upper portion of the medulla. It contains the preganglionic parasympathetic neurons that give rise to the vagus nerve fibers innervating thoracic and abdominal viscera. The pons and midbrain do not house this nucleus, and the region is karakteristically within the dorsal medullary area, i.e., the upper medulla.