Question

Which structure is pure sensory?

• A. Ramus dorsalis
• B. Dorsal root
• C. Spinal nerve
• D. Ventral root

Answer 1

The correct option is B Dorsal root

Dorsal root is the pure sensory root of a spinal nerve.

The dorsal roots contain primary afferent fibers from the skin, subcutaneous and deep tissues, and viscera. Each dorsal root fiber is the central process of a dorsal root ganglion cell.

It emerges directly from the spinal cord, and travels to the dorsal root ganglion. Nerve fibres with the ventral root then combine to form a spinal nerve. The dorsal root transmits sensory information, forming the afferent sensory root of a spinal nerve.