Which set correctly lists the three parts referred to as components of spinal nerves?

Which set correctly lists the three parts referred to as components of spinal nerves?

• A. Dorsal root, ventral root and intermediolateral cell column
• B. Dorsal root, dorsal horn and intermediolateral cell column
• C. Ventral root, ventral horn and dorsal root ganglion
• D. Dorsal root ganglion, ventral root and lateral horn

Answer: (A)

The question is asking which structures are associated with spinal nerves in terms of their formation and autonomic connections. Spinal nerves are formed by the union of a dorsal root and a ventral root. The intermediolateral cell column is the region in the spinal cord (thoracic and upper lumbar) containing the cell bodies of preganglionic sympathetic neurons; their axons travel out with the ventral root to join the spinal nerve and reach sympathetic ganglia and targets. So, listing the dorsal root, the ventral root, and the intermediolateral cell column captures the key components linked to spinal nerves: the two roots that form the nerve and the autonomic input that travels with it. The other options mix structures that are within the spinal cord itself (like the dorsal/ventral horns or dorsal root ganglion) and aren’t described as the triplet components of the spinal nerve.

The question is asking which structures are associated with spinal nerves in terms of their formation and autonomic connections. Spinal nerves are formed by the union of a dorsal root and a ventral root. The intermediolateral cell column is the region in the spinal cord (thoracic and upper lumbar) containing the cell bodies of preganglionic sympathetic neurons; their axons travel out with the ventral root to join the spinal nerve and reach sympathetic ganglia and targets.

So, listing the dorsal root, the ventral root, and the intermediolateral cell column captures the key components linked to spinal nerves: the two roots that form the nerve and the autonomic input that travels with it. The other options mix structures that are within the spinal cord itself (like the dorsal/ventral horns or dorsal root ganglion) and aren’t described as the triplet components of the spinal nerve.